Exhibit 4.2

                                 HSB GROUP, INC.



                                       to



                       THE FIRST NATIONAL BANK OF CHICAGO,
                                   as Trustee



                           ---------------------------



                                    INDENTURE


                          Dated as of December 31, 1997


                           ---------------------------



                          7.0% CONVERTIBLE SUBORDINATED
                          DEFERRABLE INTEREST DEBENTURE
                              DUE DECEMBER 31, 2017









                                                  HSB GROUP, INC.


         Reconciliation  and  tie  between  the  Trust  Indenture  Act  of  1939
(including  cross-references  to  provisions of Section 310 to and including 317
which, pursuant to Section 318(c) of the Trust Indenture Act of 1939, as amended
by the Trust Reform Act of 1990, are a part of and govern the Indenture  whether
or not physically contained therein) and the Indenture, dated as of December 31,
1997.

TRUST INDENTURE ACT SECTION                 INDENTURE SECTION

(ss.) 310 (a) (1), (2) and (5)..............................    6.9
          (a) (3)...........................................    Not Applicable
          (a)(4)............................................    Not Applicable
          (b)...............................................    6.8
          ..................................................    6.10
          (c)...............................................    Not Applicable
(ss.) 311 (a)...............................................    6.13
          (b)...............................................    6.13
          (b) (2)...........................................    7.3(a)
          ..................................................    7.3(a)
(ss.) 312 (a)...............................................    7.1
          ..................................................    7.2(a)
          (b)...............................................    7.2(b)
          (c)...............................................    7.2(c)
(ss.) 313 (a)...............................................    7.3(a)
          (b)...............................................    7.3(b)
          (c)...............................................    7.3(a), 7.3(b)
          (d)...............................................    7.3(c)
(ss.) 314 (a) (1), (2) and (3)..............................    7.4
          (a) (4)...........................................    10.5
          (b)...............................................    Not Applicable
          (c)(1)............................................    1.2
          (c)(2)............................................    1.2
          (c)(3)............................................    Not Applicable
          (d)...............................................    Not Applicable
          (e)...............................................    1.2
          (f)...............................................    Not Applicable
(ss.) 315 (a)...............................................    6.1(a)
          (b)...............................................    6.2
          ..................................................    7.3(a)
          (c)...............................................    6.1(b)
          (d)...............................................    6.1(c)
          (d)(1)............................................    6.1(a)(1)







          (d)(2)............................................    6.1(c)(2)
          (d)(3)............................................    6.1(c)(3)
          (e)...............................................    5.14
(ss.) 316 (a)...............................................    1.1
          (a)(1)(A).........................................    5.12
          (a)(1)(B).........................................    5.13
          (a)(2)............................................    Not Applicable
          (b)...............................................    5.8
          (c)...............................................    1.4(f)
(ss.) 317 (a)(1)............................................    5.3
          (a)(2)............................................    5.4
          (b)...............................................    10.3
(ss.) 318 (a)...............................................    1.7

- --------------------

Note:     This reconciliation and tie shall not, for any purpose, be deemed to 
          be a part of the Indenture.







                                TABLE OF CONTENTS
                                                                        Page



                                    ARTICLE I
              DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION..... 1

SECTION 1.1.  Definitions................................................  1
SECTION 1.2.  Compliance Certificate and Opinions........................ 10
SECTION 1.3.  Forms of Documents Delivered to Trustee.................... 11
SECTION 1.4.  Acts of Holders............................................ 11
SECTION 1.5.  Notices, Etc. to Trustee and Corporation................... 13
SECTION 1.6.  Notice to Holders; Waiver.................................. 14
SECTION 1.7.  Conflict with Trust Indenture Act.......................... 14
SECTION 1.8.  Effect of Headings and Table of Contents................... 14
SECTION 1.9.  Successors and Assigns..................................... 14
SECTION 1.10.  Separability Clause....................................... 15
SECTION 1.11.  Benefits of Indenture..................................... 15
SECTION 1.12.  Governing Law............................................. 15
SECTION 1.13.  Non-Business Days......................................... 15

                          ARTICLE II
       SECURITY FORMS.................................................... 15

SECTION 2.1.  Forms Generally............................................ 15
SECTION 2.2.  Form of Face of Security................................... 16
SECTION 2.3.  Form of Reverse of Security................................ 19
SECTION 2.4.  Restrictive Legends........................................ 21
SECTION 2.5.  Form of Trustee's Certificate of Authentication............ 22

                          ARTICLE III
        THE SECURITIES.................................................... 22

SECTION 3.1.  Title and Terms............................................. 22
SECTION 3.2.  Denominations............................................... 22
SECTION 3.3.  Execution, Authentication and Dating........................ 23
SECTION 3.4.  Temporary Securities........................................ 23
SECTION 3.5.  Registration, Transfer and Exchanges........................ 24
SECTION 3.6.  Mutilated, Destroyed, Lost and Stolen Securities............ 27
SECTION 3.7.  Payment of Interest; Interest Rights Preserved.............. 28
SECTION 3.8.  Persons Deemed Owners....................................... 29
SECTION 3.9.  Cancellation................................................ 30
SECTION 3.10.  Computation of Interest.................................... 30

                             - i -






 SECTION 3.11.  Deferrals of Interest Payment Dates....................... 30
 SECTION 3.12.  Right of Set-Off.......................................... 31
 SECTION 3.13.  Agreed Tax Treatment...................................... 31
 SECTION 3.14.  Shortening of Stated Maturity............................. 31
 SECTION 3.15.  CUSIP Numbers............................................. 31



                           ARTICLE IV
     SATISFACTION AND DISCHARGE........................................... 32

 SECTION 4.1.  Satisfaction and Discharge of Indenture.................... 32
 SECTION 4.2.  Application of Trust Money................................. 33


                            ARTICLE V
           REMEDIES....................................................... 33

 SECTION 5.1.  Events of Default..............................................33
 SECTION 5.2.  Acceleration of Maturity; Rescission and Annulment.............34
 SECTION 5.3.  Collection of Indebtedness and Suits for Enforcement by 
               Trustee....................................................... 36
 SECTION 5.4.  Trustee May File Proofs of Claim.............................. 36
 SECTION 5.5.  Trustee May Enforce Claim Without Possession of Securities.... 37
 SECTION 5.6.  Application of Money Collected................................ 37
 SECTION 5.7.  Limitation on Suits........................................... 38
 SECTION 5.8.  Unconditional Right of Holders to Receive Principal, Premium
          and Interest; Direct Action by Holders of Capital Securities....... 39
 SECTION 5.9.  Restoration of Rights and Remedies............................ 39
 SECTION 5.10.  Rights and Remedies Cumulative............................... 39
 SECTION 5.11.  Delay or Omission Not Waiver................................. 39
 SECTION 5.12.  Control by Holders........................................... 40
 SECTION 5.13.  Waiver of Past Defaults...................................... 40
 SECTION 5.14.  Undertaking for Costs........................................ 41
 SECTION 5.15.  Waiver of Usury, Stay or Extension Laws...................... 41


                           ARTICLE VI
             THE TRUSTEE..................................................... 41

 SECTION 6.1.  Certain Duties and Responsibilities........................... 41
 SECTION 6.2.  Notice of Defaults............................................ 43
 SECTION 6.3.  Certain Rights of Trustee..................................... 43
 SECTION 6.4.  Not Responsible for Recitals or Issuance of Securities........ 44
 SECTION 6.5.  May Hold Securities........................................... 44

                             - ii -






 SECTION 6.6.  Money Held in Trust.......................................... 44
 SECTION 6.7.  Compensation and Reimbursement............................... 44
 SECTION 6.8.  Disqualification; Conflicting Interests...................... 45
 SECTION 6.9.  Corporate Trustee Required; Eligibility...................... 45
 SECTION 6.10.  Resignation and Removal; Appointment of Successor........... 46
 SECTION 6.11.  Acceptance of Appointment by Successor...................... 47
 SECTION 6.12.  Merger, Conversion, Consolidation or Succession to Business. 48
 SECTION 6.13.  Preferential Collection of Claims Against Corporation....... 49
 SECTION 6.14.  Appointment of Authenticating Agent......................... 49


                                   ARTICLE VII
       HOLDER'S LISTS AND REPORTS BY TRUSTEE AND CORPORATION................ 50

 SECTION 7.1.  Corporation to Furnish Trustee Names and Addresses of Holders. 50
 SECTION 7.2.  Preservation of Information, Communications to Holders........ 51
 SECTION 7.3.  Reports by Trustee............................................ 51
 SECTION 7.4.  Reports by Corporation........................................ 51



                                  ARTICLE 
           CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE.............. 52

SECTION 8.1.  Corporation May Consolidate, Etc., Only on Certain Terms...... 52
SECTION 8.2.  Successor Corporation Substituted............................. 53


                          ARTICLE IX
                              SUPPLEMENTAL INDENTURES....................... 53

SECTION 9.1.  Supplemental Indentures Without Consent of Holders............ 53
SECTION 9.2.  Supplemental Indentures with Consent of Holders............... 54
SECTION 9.3.  Execution of Supplemental Indentures.......................... 56
SECTION 9.4.  Effect of Supplemental Indentures............................. 56
SECTION 9.5.  Conformity with Trust Indenture Act........................... 56
SECTION 9.6.  Reference in Securities to Supplemental Indentures............ 56



                            - iii -






                                    ARTICLE X
                    COVENANTS................................................ 56

SECTION 10.1.  Payment of Principal, Premium and Interest.................... 56
SECTION 10.2.  Maintenance of Office or Agency............................... 57
SECTION 10.3.  Money for Security Payments to be Held in Trust............... 57
SECTION 10.4.  Statement as to Compliance.................................... 59
SECTION 10.5.  Waiver of Certain Covenants................................... 59
SECTION 10.6.  Additional Sums............................................... 59
SECTION 10.7.  Additional Covenants.......................................... 60


                                   ARTICLE XI
           REDEMPTION OF SECURITIES.......................................... 61

SECTION 11.1.  Applicability of This Article................................. 61
SECTION 11.2.  Election to Redeem; Notice to Trustee......................... 61
SECTION 11.3.  Selection of Securities to be Redeemed........................ 61
SECTION 11.4.  Notice of Redemption.......................................... 62
SECTION 11.5.  Deposit of Redemption Price................................... 63
SECTION 11.6.  Payment of Securities Called for Redemption................... 63
SECTION 11.7.  Right of Redemption of Securities Initially Issued to an 
               Issuer Trust.................................................. 63
SECTION 11.8.  Mandatory Redemption Provisions............................... 64

                          ARTICLE XII
       RANKING; SUBORDINATION OF SECURITIES.................................. 65

SECTION 12.1.  Ranking; Securities Subordinate to Senior Indebtedness....... 65
SECTION 12.2.  No Payment When Senior Indebtedness in Default; Payment
         Over of Proceeds Upon Dissolution, Etc............................. 65
SECTION 12.3.  Payment Permitted If No Default.............................. 67
SECTION 12.4.  Subrogation to Rights of Holders of Senior Indebtedness...... 67
SECTION 12.5.  Provisions Solely to Define Relative Rights.................. 68
SECTION 12.6.  Trustee to Effectuate Subordination.......................... 68
SECTION 12.7.  No Waiver of Subordination Provisions........................ 68
SECTION 12.8.  Notice to Trustee............................................ 69
SECTION 12.9.  Reliance on Judicial Order or Certificate of Liquidating 
               Agent........................................................ 70
SECTION 12.10.  Trustee Not Fiduciary for Holders of Senior Indebtedness.... 70
SECTION 12.11.  Rights of Trustee as Holder of Senior Indebtedness;
         Preservation of Trustee's Rights................................... 70
SECTION 12.12.  Article Applicable to Paying Agents......................... 70
SECTION 12.13.  Certain Conversions or Exchanges Deemed Payment............. 70


                            - iv -






                          ARTICLE XIII
      CONVERSION OF SECURITIES............................................... 71

 SECTION 13.1.  Conversion Rights............................................ 71
 SECTION 13.2.  Conversion Procedures........................................ 71
 SECTION 13.3.  Conversion Price Adjustments................................. 74
 SECTION 13.4.  Notice of Adjustments of Conversion Price.................... 77
 SECTION 13.5.  Prior Notice of Certain Events............................... 77
 SECTION 13.6.  Dividend or Interest Reinvestment Plans...................... 78
 SECTION 13.7.  Certain Additional Rights.................................... 78
 SECTION 13.8.  Restrictions on Common Stock Issuable Upon Conversion........ 79
 SECTION 13.9.  Trustee Not Responsible for Determining Conversion Price or
          Adjustments........................................................ 79

                           ARTICLE XIV
              EXPENSES....................................................... 80

 SECTION 14.1.  Payment of Expenses by the Corporation....................... 80
 SECTION 14.2.  Term of Agreement............................................ 80
 SECTION 14.3.  Waiver of Notice............................................. 81
 SECTION 14.4.  No Impairment................................................ 81
 SECTION 14.5.  Enforcement.................................................. 81
 SECTION 14.6.  Subrogation.................................................. 81
 SECTION 14.7.  Amendment.................................................... 82



                              - v -







         INDENTURE,  dated as of December 31, 1997,  between HSB GROUP,  INC., a
Connecticut corporation (the "Corporation"),  having its principal office at One
State Street, Hartford,  Connecticut,  and The First National Bank of Chicago, a
national banking association, as Trustee (the "Trustee").


                           Recitals of the Corporation

         Whereas, the Corporation has duly authorized the execution and delivery
of  this  Indenture  to  provide  for  the  issuance  of  its  7.0%  Convertible
Subordinated  Deferrable Interest Debentures (the "Securities") of substantially
the tenor hereinafter  provided,  including  Securities issued to evidence loans
made to the Corporation with the proceeds from the issuance by HSB Capital II, a
Delaware business trust (the "Issuer Trust") of preferred  undivided  beneficial
interests  in the assets of such Issuer  Trust (the  "Capital  Securities")  and
common  undivided  interests  in the assets of such  Issuer  Trust (the  "Common
Securities"),  and to provide the terms and conditions upon which the Securities
are to be authenticated, issued and delivered; and

         Whereas,  all things necessary to make this Indenture a valid agreement
of the Corporation, in accordance with its terms, have been done.

         Now Therefore, this Indenture Witnesseth:

         For  and in  consideration  of the  premises  and the  purchase  of the
Securities by the Holders thereof, it is mutually covenanted and agreed, for the
equal and proportionate benefit of all Holders of the Securities, as follows:


                                    ARTICLE I

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

         SECTION 1.1.  Definitions.

         For all  purposes  of this  Indenture,  except as  otherwise  expressly
provided or unless the context otherwise requires:

                  (a) The  terms  defined  in this  Article  have  the  meanings
         assigned to them in this Article, and include the plural as well as the
         singular;

                  (b) All other  terms used herein that are defined in the Trust
         Indenture  Act,  either  directly  or by  reference  therein,  have the
         meanings assigned to them therein;


                                                         - 1 -






               (c) The words  "include",  "includes"  and  "including"  shall be
          deemed to be followed by the phrase "without limitation";

               (d) All  accounting  terms not otherwise  defined herein have the
          meanings  assigned  to  them in  accordance  with  generally  accepted
          accounting principles;

               (e) Whenever the context may require,  any gender shall be deemed
          to include the others;

               (f) Unless the context  otherwise  requires,  any reference to an
          "Article"  or a  "Section"  refers to an Article or a Section,  as the
          case may be, of this Indenture; and

               (g) The words  "hereby",  "herein",  "hereof" and "hereunder" and
          other words of similar  import refer to this  Indenture as a whole and
          not to any particular Article, Section or other subdivision.

         "Act" when used with  respect to any Holder has the meaning  specified
in Section 1.4.

         "Additional Sums" has the meaning specified in Section 10.6.

         "Additional  Taxes"  means  any  additional  taxes,  duties  and  other
governmental  charges to which an Issuer  Trust has become  subject from time to
time as a result of a Tax Event.

         "Affiliate" of any specified  Person means any other Person directly or
indirectly  controlling  or  controlled  by or under  direct or indirect  common
control  with  such  specified  Person.  For the  purposes  of this  definition,
"control"  when used with  respect to any  specified  Person  means the power to
direct the  management  and  policies of such  Person,  directly or  indirectly,
whether  through the ownership of voting  securities,  by contract or otherwise;
and the terms  "controlling" and "controlled"  have meanings  correlative to the
foregoing.

         "Authenticating  Agent"  means any  Person  authorized  by the  Trustee
pursuant  to Section  6.14 to act on behalf of the Trustee to  authenticate  the
Securities.

         "Bankruptcy  Code"  means  Title 11 of the  United  States  Code or any
successor statute thereto, in each case as amended from time to time.

         "Board of Directors" means the board of directors of the Corporation or
the  Executive  Committee of the board of directors of the  Corporation  (or any
other committee of the board of directors of the Corporation  performing similar
functions)  or  a  committee  designated  by  the  board  of  directors  of  the
Corporation (or such  committee),  comprised of two or more members of the board
of directors of the Corporation or officers of the Corporation, or both.

         "Board  Resolution"  means  a copy  of a  resolution  certified  by the
Corporate  Secretary or an Assistant  Secretary of the  Corporation to have been
duly adopted by the Board of Directors,

                                                         - 2 -






or officers of the  Corporation to which authority to act on behalf of the Board
of Directors has been delegated,  and to be in full force and effect on the date
of such certification, and delivered to the Trustee.

         "Business Day" means any day other than (i) a Saturday or Sunday,  (ii)
a day on which banking  institutions  in The City of New York are  authorized or
required by law or executive order to remain closed, or (iii) a day on which the
Corporate Trust Office of the Trustee, or the Corporate Trust Office (as defined
in the related Trust  Agreement) of the Property Trustee or the Delaware Trustee
under the related Trust Agreement, is closed for business.

          "Capital Securities" has the meaning specified in the first recital of
this Indenture.

          "Change of Control"  shall mean an  acquisition of greater than 50% of
the outstanding  voting  securities of either HSB Group,  Inc. or Employers
Reinsurance Corporation, as the case may be.

         "Commission" means the Securities and Exchange Commission, as from time
to time constituted, created under the Exchange Act, or if at any time after the
execution of this  instrument  such  Securities  and Exchange  Commission is not
existing and performing the duties now assigned to it under the Trust  Indenture
Act, then the body performing such duties on such date.

          "Common  Securities" has the meaning specified in the first recital of
this Indenture.

         "Common Stock" means common stock, no par value, of the Corporation.

         "Conversion Agent" has the meaning specified in Section 13.2.

         "Conversion Date" has the meaning specified in Section 13.2.

         "Conversion Price" has the meaning specified in Section 13.1.

         "Corporate  Trust Office" means the principal  office of the Trustee at
which at any particular time its corporate trust business shall be administered.

         "corporation"  includes a corporation,  association,  company,  limited
liability company, joint-stock company or business trust.

         "Corporation"  means the Person named as the "Corporation" in the first
paragraph of this  instrument  until a successor  corporation  shall have become
such pursuant to the  applicable  provisions of this  Indenture,  and thereafter
"Corporation" shall mean such successor corporation.


                                                         - 3 -






         "Corporation  Request" and "Corporation  Order" mean,  respectively,  a
written  request  or order  signed in the name of the  Corporation  by its Chief
Executive  Officer,  its  President,  one of its Senior Vice  Presidents or Vice
Presidents  and by its  Chief  Financial  Officer,  Treasurer,  Controller,  its
Corporate Secretary or an Assistant Secretary, and delivered to the Trustee.

         "Current  Market Price" means for any day the last reported sale price,
regular  way,  on such day of Common  Stock,  or, if no sale takes place on such
day,  the  average of the  reported  closing  bid and asked  prices on such day,
regular way, in either case as reported on the NYSE Composite Transactions Tape,
or, if the Common Stock is not listed or admitted to trading on the NYSE on such
day, on the principal national  securities exchange on which the Common Stock is
listed or admitted to trading,  exchange,  or the Nasdaq National Market, or, if
the Common Stock is not quoted or admitted to trading on such quotation  system,
on the  principal  quotation  system on which the Common  Stock may be listed or
admitted  to  trading or quoted,  or, if not  listed or  admitted  to trading or
quoted on any national  securities  exchange or quotation system, the average of
the closing  bid and asked  prices of the Common  Stock in the  over-the-counter
market on the day in  question  as reported  by the  National  Quotation  Bureau
Incorporated,  or a similar generally accepted reporting service,  or, if not so
available in such manner,  as  furnished by any NYSE member firm  selected  from
time to time by the Board od Directors  for that purpose or, if not so available
in such manner, as otherwise determined in good faith by the Board of Directors.

         "Debt" means,  with respect to any Corporation,  whether recourse is to
all or a portion of the assets of such Corporation and whether or not contingent
and without  duplication,  (i) every  obligation of such  Corporation  for money
borrowed;  (ii)  every  obligation  of  such  Corporation  evidenced  by  bonds,
debentures,  notes or other similar instruments,  including obligations incurred
in connection  with the  acquisition of property,  assets or  businesses;  (iii)
every  reimbursement  obligation of such  Corporation with respect to letters of
credit,  bankers'  acceptances or similar  facilities  issued for the account of
such Corporation; (iv) every obligation of such Corporation issued or assumed as
the  deferred  purchase  price of  property  or services  (but  excluding  trade
accounts  payable  or accrued  liabilities  arising  in the  ordinary  course of
business);  (v) every capital lease  obligation  of such  Corporation;  (vi) all
indebtedness  of the  Corporation,  whether  incurred on or prior to the date of
this  Indenture  or  thereafter  incurred,  for claims in respect of  derivative
products,  including  interest rate, foreign exchange rate and commodity forward
contracts,  options  and  swaps  and  similar  arrangements;   and  (vii)  every
obligation of the type referred to in clauses (i) through (vi) of another Person
and all dividends of another Person the payment of which,  in either case,  such
Corporation  has  guaranteed  or is  responsible  or  liable  for,  directly  or
indirectly, as obligor or otherwise.

         "Defaulted Interest" has the meaning specified in Section 3.7.

         "Delaware  Trustee" means, with respect to any Issuer Trust, the Person
identified as the "Delaware  Trustee" in the related Trust Agreement,  solely in
its capacity as Delaware Trustee of such Issuer Trust under such Trust Agreement
and not in its individual capacity, or its

                                                         - 4 -






successor  in interest  in such  capacity,  or any  successor  Delaware  trustee
appointed as therein provided.

         "Distributions",  with  respect  to the Trust  Securities  issued by an
Issuer  Trust,  means  amounts  payable in respect of such Trust  Securities  as
provided  in  the  related   Trust   Agreement   and   referred  to  therein  as
"Distributions".

         "Dollar"  or "$" means the  currency  of the  United  States of America
that,  as at the time of payment,  is legal tender for the payment of public and
private debts.

         "Event of Default" has the meaning specified in Article V.

         "Exchange  Act"  means  the  Securities  Exchange  Act of  1934  or any
successor statute thereto, in each case as amended from time to time.

         "Expiration Date" has the meaning specified in Section 1.4.

         "Extension Period" has the meaning specified in Section 3.11.

         "Guarantee  Agreement"  means,  with respect to any Issuer  Trust,  the
Guarantee  Agreement  executed by the Corporation for the benefit of the Holders
of the Capital  Securities issued by such Issuer Trust, as modified,  amended or
supplemented from time to time.

          "Holder"  means a Person in whose name a Security is registered in the
Securities Register.

         "Indenture"  means this instrument as originally  executed or as it may
from  time  to  time  be  supplemented  or  amended  by one or  more  indentures
supplemental hereto entered into pursuant to the applicable provisions hereof.

          "Interest Payment Date" means the Stated Maturity of an installment of
interest on the Securities.

         "Interest  Rate" means the rate of interest  specified or determined as
specified  in the  Security  as  being  the  rate of  interest  payable  on such
Security.

          "Issuer Trust" has the meaning  specified in the first recital of this
Indenture.

         "Maturity"  when used with  respect to any  Security  means the date on
which the principal of such Security or any installment of principal becomes due
and payable as therein or herein provided,  whether at the Stated Maturity or by
declaration of acceleration, call for redemption or otherwise.


                                                         - 5 -






         "Notice of  Conversion"  means the notice  given by a holder of Capital
Securities to the Conversion  Agent  directing the Conversion  Agent to exchange
such Capital  Securities  for  Securities  and to convert such  Securities  into
Common Stock on behalf of such holder.

          "Notice of Default"  means a written  notice of the kind  specified in
Section 5.1(3).

         "Officers'  Certificate"  means  a  certificate  signed  by  its  Chief
Executive  Officer,  the President or a Senior Vice President,  and by the Chief
Financial Officer,  Treasurer or the Corporate Secretary or Assistant Secretary,
of the Corporation and delivered to the Trustee.

         "Opinion of  Counsel"  means a written  opinion of counsel,  who may be
counsel  for  or an  employee  of  the  Corporation  or  any  Affiliate  of  the
Corporation.

         "Original  Issue Date" means the date of issuance  specified as such in
each Security.

         "Outstanding"  means,  when used in reference to any Securities,  as of
the  date  of  determination,   all  Securities  theretofore  authenticated  and
delivered under this Indenture, except:

               (i) Securities  theretofore  canceled by the Trustee or delivered
          to the Trustee for cancellation;

               (ii)  Securities for whose payment money in the necessary  amount
          has been theretofore deposited with the Trustee or any Paying Agent in
          trust for the Holders of such Securities; and

               (iii)  Securities in  substitution  for or in lieu of which other
          Securities  have been  authenticated  and  delivered or that have been
          paid pursuant to Section 3.7, unless proof satisfactory to the Trustee
          is  presented  that any such  Securities  are held by Holders in whose
          hands such Securities are valid,  binding and legal obligations of the
          Corporation;

provided,  however,  that in  determining  whether the Holders of the  requisite
principal  amount of  Outstanding  Securities  have given any  request,  demand,
authorization,  direction, notice, consent or waiver hereunder, Securities owned
by the  Corporation or any other obligor upon the Securities or any Affiliate of
the  Corporation or such other obligor shall be disregarded and deemed not to be
Outstanding,  except that, in determining whether the Trustee shall be protected
in relying upon any such  request,  demand,  authorization,  direction,  notice,
consent or waiver,  only  Securities that the Trustee knows to be so owned shall
be so disregarded.  Securities so owned that have been pledged in good faith may
be regarded as Outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's  right so to act with respect to such  Securities and that
the pledgee is not the  Corporation  or any other obligor upon the Securities or
any Affiliate of the Corporation or such other obligor. Upon the written request
of the  Trustee,  the  Corporation  shall  furnish to the  Trustee  promptly  an
Officers'  Certificate listing and identifying all Securities,  if any, known by
the  Corporation to be owned or held by or for the account of the Corporation or
any other obligor on the Securities, or any Affiliate of the

                                                         - 6 -






Corporation  or such obligor,  and subject to the provisions of Section 6.1, the
Trustee  shall be entitled to accept such  Officers'  Certificate  as conclusive
evidence of the facts therein set forth and of the fact that all  Securities not
listed  therein  are  Outstanding  for the  purpose  of any such  determination.
Notwithstanding  anything herein to the contrary,  Securities shall be deemed to
be Outstanding  notwithstanding the ownership by the Corporation or an Affiliate
of any beneficial interest in such Issuer Trust.

         "Paying  Agent"  means the  Trustee  or any  Person  authorized  by the
Corporation  to pay the  principal  of (or  premium,  if any) or interest on, or
other amounts in respect of, any Securities on behalf of the Corporation.

         "Person" means a legal person,  including any individual,  corporation,
estate,  partnership,  joint  venture,  trust,  unincorporated  association,  or
government or any agency or political  subdivision  thereof, or any other entity
of whatever nature.

         "Place of Payment" means, with respect to the Securities, New York, New
York or Chicago,  Illinois,  where the  principal of (and  premium,  if any) and
interest on the Securities are payable.

         "Predecessor  Security" of any particular Security means every previous
Security  evidencing all or a portion of the same debt as that evidenced by such
particular  Security.  For  the  purposes  of  this  definition,   any  security
authenticated  and  delivered  under Section 3.6 in exchange for or in lieu of a
mutilated,  destroyed,  lost or stolen  Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

         "Procedures" has the meaning specified in Section 13.3.

         "Proceeding" has the meaning specified in Section 12.2.

         "Property  Trustee" means, with respect to the Issuer Trust, the Person
identified as the "Property  Trustee" in the related Trust Agreement,  solely in
its capacity as Property Trustee of such Issuer Trust under such Trust Agreement
and  not in its  individual  capacity,  or its  successor  in  interest  in such
capacity, or any successor property trustee appointed as therein provided.

         "Redemption  Date",  when  used  with  respect  to any  Security  to be
redeemed,  means  the date  fixed for such  redemption  by or  pursuant  to this
Indenture or the terms of such Security.

         "Redemption  Price",  when  used with  respect  to any  Security  to be
redeemed,  means  the  price  at  which it is to be  redeemed  pursuant  to this
Indenture or the terms of such Security.

         "Regular Record Date" for the interest  payable on any Interest Payment
Date,  the day that is fifteen days next  preceding  such Interest  Payment Date
(whether or not a Business Day).


                                                         - 7 -






         "Responsible Officer", when used with respect to the Trustee, means the
chairman or any  vice-chairman  of the board of  directors,  the chairman or any
vice-chairman of the executive committee of the board of directors, the chairman
of the trust committee,  the president,  any vice president,  the secretary, any
assistant secretary,  the treasurer,  any assistant treasurer,  the cashier, any
assistant cashier,  any trust officer or assistant trust officer, the controller
or any  assistant  controller  or any other  officer of the Trustee  customarily
performing  functions  similar to those performed by any of the above designated
officers and also means, with respect to a particular  matter, any other officer
to whom such  matter is  referred  because of such  officer's  knowledge  of and
familiarity with the particular subject.

         "Restricted  Securities"  means all Securities for which it is required
pursuant to Section 2.4 to bear a Restricted Securities Legend.

         "Restricted Securities Legend" has the meaning specified in Section 
2.4.

         "Restricted   Security"  means  each  Security  required  to  bear  the
Restricted Securities Legend.

         "Rights  Plan"  means  a plan  of the  Corporation  providing  for  the
issuance  by the  Corporation  to all  holders  of its  Common  Stock of  rights
entitling the holders  thereof to subscribe for or purchase  shares of any class
or series of capital stock of the Corporation, which rights are (i) deemed to be
transferred  with such shares of Common Stock and (ii) also issued in respect of
future  issuances of such Common Stock,  in each case until the  occurrence of a
specified event or events.

         "Securities  Act"  means the  Securities  Act of 1933 or any  successor
statute thereto, in each case as amended from time to time.

         "Securities Act Legend" means a Restricted Securities Legend.

          "Securities  Register" and "Securities  Registrar" have the respective
meanings specified in Section 3.5.

          "Security" means any debt security  authenticated  and delivered under
this Indenture.

         "Senior  Indebtedness" means the principal of (and premium, if any) and
interest,  if any  (including  interest  accruing  on or after the filing of any
petition in bankruptcy or for reorganization relating to the Corporation whether
or not such claim for post-petition interest is allowed in such proceeding),  on
Debt of the  Corporation,  whether  incurred  on or  prior  to the  date of this
Indenture  or  hereafter  incurred,   unless,  in  the  instrument  creating  or
evidencing the same or pursuant to which the same is outstanding, it is provided
that such  obligations are not superior in right of payment to the Securities or
to other Debt that is pari  passu  with,  or  subordinated  to, the  Securities,
provided,  however,  that Senior Indebtedness shall not be deemed to include (a)
any Debt of the Corporation that, when incurred and without respect to any

                                                         - 8 -






election under Section 1111(b) of the Bankruptcy Reform Act of 1978, was without
recourse  to the  Corporation,  (b) any  Debt of the  Corporation  to any of its
Subsidiaries,  (c) any Debt of the  Corporation to any Person who is an employee
of the Corporation and (d) any Securities.

         "Special Record Date" for the payment of any Defaulted Interest means a
date fixed by the Trustee pursuant to Section 3.7.

         "Stated  Maturity",  when  used with  respect  to any  Security  or any
installment of principal thereof (or premium, if any) or interest thereon, means
the date  specified  pursuant to the terms of such Security as the fixed date on
which the  principal  of such  Security or such  installment  of  principal  (or
premium,  if any) or interest is due and payable,  as such date may be shortened
as provided  pursuant to the terms of such Security and this  Indenture,  in the
case of the Stated Maturity of any Security,  and subject to the deferral of any
such  date  during  any  Extension  Period,  in the case of any  installment  of
interest.

         "Subsidiary"  means a  corporation  more  than  50% of the  outstanding
voting stock of which is owned, directly or indirectly, by the Corporation or by
one or more  other  Subsidiaries,  or by the  Corporation  and one or more other
Subsidiaries.  For purposes of this definition,  "voting stock" means stock that
ordinarily has voting power for the election of directors,  whether at all times
or only so long as no senior  class of stock has such voting  power by reason of
any contingency.

         "Successor  Security" of any  particular  Security means every Security
issued after, and evidencing all or a portion of the same debt as that evidenced
by, such particular Security. For the purposes of this definition,  any Security
authenticated  and  delivered  under Section 3.6 in exchange for or in lieu of a
mutilated,  destroyed,  lost or stolen  Security shall be deemed to evidence the
same debt as the mutilated, destroyed, lost or stolen Security.

         "Tax  Event"  means the  receipt by the  Issuer  Trust of an Opinion of
Counsel  experienced  in such  matters  to the effect  that,  as a result of any
amendment to, or change  (including any announced  proposed change) in, the laws
(or  any  regulations   thereunder)  of  the  United  States  or  any  political
subdivision  or  taxing  authority  thereof  or  therein,  or as a result of any
official  administrative  pronouncement  or judicial  decision  interpreting  or
applying  such laws or  regulations,  which  amendment or change is effective or
which pronouncement or decision is announced on or after the date of issuance of
the Capital Securities of such Issuer Trust, there is more than an insubstantial
risk that (i) such  Issuer  Trust is, or within 90 days of the  delivery of such
Opinion of Counsel will be,  subject to United  States  federal  income tax with
respect  to  income  received  or  accrued  on  the  Securities  issued  by  the
Corporation to such Issuer Trust,  (ii) interest  payable by the  Corporation on
such  Securities  is not, or within 90 days of the  delivery of such  Opinion of
Counsel will not be,  deductible by the  Corporation,  in whole or in part,  for
United States  federal  income tax  purposes,  or (iii) such Issuer Trust is, or
within 90 days of the delivery of such  Opinion of Counsel  will be,  subject to
more than a de  minimis  amount  of other  taxes,  duties or other  governmental
charges.


                                                         - 9 -






         "Trust  Agreement"  means,  with respect to the Issuer Trust, the trust
agreement or other governing instrument of such Issuer Trust.

         "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force
at the date as of which this instrument was executed; provided, however, that if
the Trust  Indenture  Act of 1939 is amended after such date,  "Trust  Indenture
Act" means the Trust Indenture Act of 1939 as so amended.

          "Trust  Securities"  means  the  Common  Securities  and  the  Capital
Securities.

         "Trustee"  means  the  Person  named  as the  "Trustee"  in  the  first
paragraph of this instrument,  solely in its capacity as such Trustee and not in
its  individual  capacity,  until a  successor  Trustee  shall have  become such
pursuant  to  the  applicable  provisions  of  this  Indenture,  and  thereafter
"Trustee" shall mean or include each Person who is then a Trustee hereunder and,
if at any time  there  is more  than one such  Person,  "Trustee"  as used  with
respect to the Securities shall mean the Trustee with respect to Securities.

         SECTION 1.2.  Compliance Certificate and Opinions.

         Upon any  application  or request by the  Corporation to the Trustee to
take any action under any provision of this  Indenture,  the  Corporation  shall
furnish to the Trustee an  Officers'  Certificate  stating  that all  conditions
precedent  (including  covenants  compliance with which  constitutes a condition
precedent),  if any,  provided  for in this  Indenture  relating to the proposed
action have been  complied  with and an Opinion of Counsel  stating  that in the
opinion of such  counsel  all such  conditions  precedent  (including  covenants
compliance  with which  constitutes  a condition  precedent),  if any, have been
complied with,  except that in the case of any such application or request as to
which the furnishing of such documents is specifically required by any provision
of this  Indenture  relating  to such  particular  application  or  request,  no
additional certificate or opinion need be furnished.

         Every  certificate  or  opinion  with  respect  to  compliance  with  a
condition  or  covenant   provided  for  in  this  Indenture   (other  than  the
certificates provided pursuant to Section 10.4) shall include:

                  (1) a statement by each individual signing such certificate or
         opinion that such  individual  has read such  covenant or condition and
         the definitions herein relating thereto;

                  (2) a  brief  statement  as to the  nature  and  scope  of the
         examination or  investigation  upon which the statements or opinions of
         such individual contained in such certificate or opinion are based;

                  (3) a statement that, in the opinion of such individual, he or
         she has made such  examination  or  investigation  as is  necessary  to
         enable him or her to express an  informed  opinion as to whether or not
         such covenant or condition has been complied with; and

                                                         - 10 -







                  (4)  a  statement  as to  whether,  in  the  opinion  of  such
         individual, such condition or covenant has been complied with.

         SECTION 1.3.  Forms of Documents Delivered to Trustee.

         In any case where  several  matters are required to be certified by, or
covered by an opinion of, any specified  Person,  it is not  necessary  that all
such  matters  be  certified  by, or covered by the  opinion  of,  only one such
Person,  or that they be so certified or covered by only one  document,  but one
such Person may certify or give an opinion  with respect to some matters and one
or more other such  Persons may certify or give an opinion as to other  matters,
and any of such  Persons  may  certify  or give an  opinion  as to such  matters
contained in one or several documents.

         Any  certificate  or opinion of an  officer of the  Corporation  may be
based, insofar as it relates to legal matters, upon a certificate or opinion of,
or representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the  certificate,  opinion or  representations
with  respect to matters upon which his or her  certificate  or opinion is based
are erroneous.  Any such certificate or Opinion of Counsel may be based, insofar
as it  relates  to  factual  matters,  upon a  certificate  or  opinion  of,  or
representations  by, one or more  officers of the  Corporation  stating that the
information  with respect to such factual  matters is in the  possession  of the
Corporation,  unless such counsel knows,  or in the exercise of reasonable  care
should know, that the certificate,  opinion or  representations  with respect to
matters upon which his or her certificate or opinion is based are erroneous.

         Where any  Person is  required  to make,  give or  execute  two or more
applications,  requests, consents, certificates,  statements, opinions, or other
instruments  under this Indenture,  they may, but need not, be consolidated  and
form one instrument.

         SECTION 1.4.  Acts of Holders.

         (a) Any request,  demand,  authorization,  direction,  notice, consent,
waiver or other  action  provided by this  Indenture  to be given to or taken by
Holders  may  be  embodied  in and  evidenced  by one  or  more  instruments  of
substantially similar tenor signed by such Holders in person or by an agent duly
appointed in writing;  and, except as herein otherwise expressly provided,  such
action shall become  effective  when such  instrument or  instruments  is or are
delivered to the Trustee,  and, where it is hereby  expressly  required,  to the
Corporation. Such instrument or instruments (and the action embodied therein and
evidenced  thereby) are herein sometimes referred to as the "Act" of the Holders
signing  such  instrument  or  instruments.  Proof  of  execution  of  any  such
instrument or of a writing appointing any such agent shall be sufficient for any
purpose of this  Indenture  and (subject to Section 6.1)  conclusive in favor of
the Trustee and the Corporation,  if made in the manner provided in this Section
1.4.

         (b) The  fact  and  date of the  execution  by any  Person  of any such
instrument  or  writing  may be proved  by the  affidavit  of a witness  of such
execution or by the certificate of any notary

                                                         - 11 -






public or other  officer  authorized  by law to take  acknowledgments  of deeds,
certifying that the individual  signing such instrument or writing  acknowledged
to such notary the execution thereof. Where such execution is by a Person acting
in other than such Persons's individual capacity,  such certificate or affidavit
shall also constitute sufficient proof of such Person's authority.

         (c) The  fact  and  date of the  execution  by any  Person  of any such
instrument or writing,  or the authority of the Person  executing the same,  may
also be proved in any other  manner that the  Trustee  deems  sufficient  and in
accordance with such reasonable rules as the Trustee may determine.

         (d) The  ownership  of  Securities  shall be proved  by the  Securities
Register.

         (e) Any request,  demand,  authorization,  direction,  notice, consent,
waiver or other  action by the Holder of any  Security  shall bind every  future
Holder of the same  Security  and the Holder of every  Security  issued upon the
transfer  thereof  or in  exchange  therefor  or in lieu  thereof  in respect of
anything  done or  suffered  to be done by the  Trustee  or the  Corporation  in
reliance  thereon,  whether  or not  notation  of such  action is made upon such
Security.

         (f) The Corporation may set any day as a record date for the purpose of
determining the Holders of Outstanding Securities entitled to give, make or take
any request, demand, authorization,  direction, notice, consent, waiver or other
action  provided or  permitted by this  Indenture to be given,  made or taken by
Holders of Securities,  provided that the  Corporation may not set a record date
for, and the provisions of this  paragraph  shall not apply with respect to, the
giving or making of any notice, declaration, request or direction referred to in
the next  succeeding  paragraph.  If any  record  date is set  pursuant  to this
paragraph,  the Holders of  Outstanding  Securities on such record date,  and no
other  Holders,  shall be entitled to take the relevant  action,  whether or not
such Holders remain Holders after such record date, provided that no such action
shall  be  effective  hereunder  unless  taken  on or  prior  to the  applicable
Expiration Date (as defined below) by Holders of the requisite  principal amount
of Outstanding  Securities on such record date.  Nothing in this paragraph shall
be construed to prevent the  Corporation  from setting a new record date for any
action  for  which a  record  date has  previously  been  set  pursuant  to this
paragraph (whereupon the record date previously set shall automatically and with
no action by any  Person be  canceled  and of no  effect),  and  nothing in this
paragraph  shall be construed to render  ineffective any action taken by Holders
of the requisite  principal  amount of  Outstanding  Securities on the date such
action  is  taken.  Promptly  after  any  record  date is set  pursuant  to this
paragraph,  the  Corporation,  at its own  expense,  shall cause  notice of such
record date, the proposed  action by Holders and the applicable  Expiration Date
to be given to the Trustee in writing and to each  Holder of  Securities  in the
manner set forth in Section 1.6.

         The  Trustee  may set any  day as a  record  date  for the  purpose  of
determining the Holders of Outstanding Securities entitled to join in the giving
or making of (i) any Notice of Default,  (ii) any  declaration  of  acceleration
referred to in Section 5.2, (iii) any request to institute  proceedings referred
to in Section 5.7(2), or (iv) any direction referred to in Section 5.12, in each
case with  respect to  Securities.  If any record  date is set  pursuant to this
paragraph, the

                                                         - 12 -






Holders of  Outstanding  Securities on such record date,  and no other  Holders,
shall be entitled to join in such  notice,  declaration,  request or  direction,
whether or not such Holders remain Holders after such record date, provided that
no such action  shall be  effective  hereunder  unless  taken on or prior to the
applicable  Expiration  Date by Holders  of the  requisite  principal  amount of
Outstanding  Securities on such record date.  Nothing in this paragraph shall be
construed  to prevent the Trustee  from setting a new record date for any action
for which a record  date has  previously  been set  pursuant  to this  paragraph
(whereupon the record date previously set shall automatically and with no action
by any Person be canceled and of no effect), and nothing in this paragraph shall
be construed to render  ineffective any action taken by Holders of the requisite
principal  amount of  Outstanding  Securities  on the date such action is taken.
Promptly after any record date is set pursuant to this  paragraph,  the Trustee,
at the  Corporation's  expense,  shall  cause  notice of such record  date,  the
proposed action by Holders and the applicable Expiration Date to be given to the
Corporation  in writing and to each Holder of Securities in the manner set forth
in Section 1.6.

         With  respect to any record date set  pursuant to this Section 1.4, the
party hereto that sets such record date may designate any day as the "Expiration
Date" and from time to time may change  the  Expiration  Date to any  earlier or
later day,  provided that no such change shall be effective unless notice of the
proposed new Expiration Date is given to the other party hereto in writing,  and
to each Holder of Securities in the manner set forth in Section 1.6, on or prior
to the existing  Expiration  Date. If an Expiration  Date is not designated with
respect to any record date set  pursuant to this  Section  1.4, the party hereto
that set such record date shall be deemed to have initially designated the 180th
day after such record date as the Expiration Date with respect thereto,  subject
to its  right to change  the  Expiration  Date as  provided  in this  paragraph.
Notwithstanding the foregoing,  no Expiration Date shall be later than the 180th
day after the applicable record date.

         (g) Without limiting the foregoing, a Holder entitled hereunder to take
any action  hereunder  with  regard to any  particular  Security  may do so with
regard to all or any part of the principal  amount of such Security or by one or
more duly appointed  agents each of which may do so pursuant to such appointment
with regard to all or any part of such principal amount.

         SECTION 1.5.  Notices, Etc. to Trustee and Corporation.

         Any request, demand, authorization,  direction, notice, consent, waiver
or other  Act of  Holders  or  other  document  provided  or  permitted  by this
Indenture to be made upon, given or furnished to, or filed with,

                  (1)  the  Trustee  by  any  Holder,   any  holder  of  Capital
         Securities or the  Corporation  shall be  sufficient  for every purpose
         hereunder if made, given,  furnished or filed in writing to or with the
         Trustee at its Corporate Trust office, or

                  (2) the  Corporation by the Trustee,  any Holder or any holder
         of Capital  Securities shall be sufficient for every purpose (except as
         otherwise provided in

                                                         - 13 -






         Section 5.1)  hereunder if in writing and mailed,  first-class  postage
         prepaid,  to the  Corporation  addressed  to it at the  address  of its
         principal  office specified in the first paragraph of this Indenture or
         at any other address previously  furnished in writing to the Trustee by
         the Corporation.

         SECTION 1.6.  Notice to Holders; Waiver.

         Where this Indenture  provides for notice to Holders of any event, such
notice shall be sufficiently given (unless otherwise herein expressly  provided)
if in writing and mailed,  first-class  postage prepaid, to each Holder affected
by such event,  at the  address of such  Holder as it appears in the  Securities
Register,  not later than the latest  date,  and not earlier  than the  earliest
date,  prescribed for the giving of such notice. If, by reason of the suspension
of or  irregularities  in regular mail service or for any other reason, it shall
be impossible or  impracticable to mail notice of any event to Holders when said
notice is required to be given pursuant to any provision of this Indenture or of
the  relevant  Securities,  then any  manner of giving  such  notice as shall be
satisfactory  to the Trustee  shall be deemed to be a sufficient  giving of such
notice.  In any case  where  notice to  Holders  is given by mail,  neither  the
failure to mail such  notice,  nor any  defect in any  notice so mailed,  to any
particular  Holder shall affect the  sufficiency  of such notice with respect to
other  Holders.  Where this  Indenture  provides for notice in any manner,  such
notice may be waived in writing by the Person  entitled to receive  such notice,
either  before or after the event,  and such waiver shall be the  equivalent  of
such notice.  Waivers of notice by Holders shall be filed with the Trustee,  but
such filing  shall not be a condition  precedent  to the  validity of any action
taken in reliance upon such waiver.

         SECTION 1.7.  Conflict with Trust Indenture Act.

         The Trust  Indenture  Act shall  apply as a matter of  contract to this
Indenture for purposes of  interpretation,  construction and defining the rights
and obligations hereunder,  and this Indenture,  the Corporation and the Trustee
shall be deemed for all  purposes  hereof to be subject to and  governed  by the
Trust  Indenture  Act to the same extent as would be the case if this  Indenture
were qualified under that Act on the date hereof.  Except as otherwise expressly
provided  herein,  if and to the extent  that any  provision  of this  Indenture
limits, qualifies or conflicts with the duties imposed by any of Sections 310 to
317,  inclusive,  of the Trust Indenture Act through operation of Section 318(c)
thereof, such imposed duties shall control.

         SECTION 1.8.  Effect of Headings and Table of Contents.

         The Article and Section  headings  herein and the Table of Contents are
for convenience only and shall not affect the construction hereof.


                                                         - 14 -






         SECTION 1.9.  Successors and Assigns.

         All covenants and agreements in this Indenture by the Corporation shall
bind its successors and assigns, whether so expressed or not.

         SECTION 1.10.  Separability Clause.

         If any  provision  in this  Indenture  or in the  Securities  shall  be
invalid, illegal or unenforceable,  the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

         SECTION 1.11.  Benefits of Indenture.

         Nothing in this  Indenture  or in the  Securities,  express or implied,
shall give to any Person, other than the parties hereto and their successors and
assigns, the holders of Senior Indebtedness,  the Holders of the Securities and,
to the extent expressly  provided in Sections 5.2, 5.8, 5.9, 5.11, 5.13, 9.1 and
9.2,  the holders of Capital  Securities,  any benefit or any legal or equitable
right, remedy or claim under this Indenture.

         SECTION 1.12.  Governing Law.

         THIS INDENTURE AND THE SECURITIES SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

         SECTION 1.13.  Non-Business Days.

         If any Interest Payment Date,  Redemption Date or Stated Maturity shall
not be a  Business  Day,  then  (notwithstanding  any  other  provision  of this
Indenture or the  Securities)  payment of principal of (and premium,  if any) or
interest or other  amounts in respect of such  Security need not be made on such
date, but may be made on the next succeeding Business Day (and no interest shall
accrue in respect of the amounts whose payment is so delayed for the period from
and after such Interest Payment Date, Redemption Date or Stated Maturity, as the
case may be,  until such next  succeeding  Business  Day) except  that,  if such
Business Day falls in the next  succeeding  calendar year, such payment shall be
made on the immediately preceding Business

                                                         - 15 -






Day (in each case  with the same  force  and  effect as if made on the  Interest
Payment Date or Redemption Date or at the Stated Maturity).


                                   ARTICLE II

                                 SECURITY FORMS

         SECTION 2.1.  Forms Generally.

         The Securities and the Trustee's certificate of authentication shall be
in substantially  the forms set forth in this Article,  or in such other form or
forms as shall be established by or pursuant to a Board  Resolution or in one or
more  indentures  supplemental  hereto,  in  each  case  with  such  appropriate
insertions,  omissions,  substitutions  and other  variations as are required or
permitted by this Indenture and may have such letters, numbers or other marks of
identification  and  such  legends  or  endorsements  placed  thereon  as may be
required  to comply  with  applicable  tax laws or the  rules of any  securities
exchange  or as  may,  consistently  herewith,  be  determined  by the  officers
executing such securities, as evidenced by their execution of the Securities.

         The definitive Securities shall be printed, lithographed or engraved or
produced by any  combination  of these  methods,  if required by any  securities
exchange on which the  Securities may be listed,  on a steel engraved  border or
steel engraved  borders or may be produced in any other manner  permitted by the
rules of any securities  exchange on which the Securities may be listed,  all as
determined  by the officers  executing  such  Securities,  as evidenced by their
execution of such securities.

         SECTION 2.2.  Form of Face of Security.

                                 HSB GROUP, INC.
7.0% Convertible Subordinated Deferrable Interest Debentures due December 31,
2017

No. 1                                                               $309,300,000

         HSB GROUP,  INC., a  Connecticut  corporation  (hereinafter  called the
"Corporation",  which term  includes any  successor  Person under the  Indenture
hereinafter  referred  to), for value  received,  hereby  promises to pay to The
First  National  Bank of  Chicago,  as Property  Trustee,  pursuant to the Trust
Agreement  of HSB  Capital II,  dated as of December  31,  1997,  or  registered
assigns,  the principal sum of Three Hundred Nine Million Three Hundred Thousand
($309,300,000)  Dollars on December 31, 2017;  provided that the Corporation may
shorten the Stated  Maturity  of the  principal  of this  Security to a date not
earlier  than  December 31, 2012 in the  circumstances  described on the reverse
hereof.  The Corporation  further promises to pay interest on said principal sum
from  December 31, 1997 or from the most recent  Interest  Payment Date to which
interest has been paid or duly provided for,  semi-annually (subject to deferral
as set  forth  herein)  in  arrears  on  January  15 and  July 15 of each  year,
commencing January 15,

                                                         - 16 -






1998, at the rate of 7.0% per annum,  together with Additional  Sums, if any, as
provided in Section 10.6 of the Indenture until the principal  hereof is paid or
duly provided for or made available for payment.  The amount of interest payable
for any period less than a full  interest  period shall be computed on the basis
of a 360-day  year of twelve  30-day  months  and the actual  days  elapsed in a
partial  month in such  period.  The  amount of  interest  payable  for any full
interest  period shall be computed by dividing the applicable  rate per annum by
two. The interest so payable,  and punctually  paid or duly provided for, on any
Interest Payment Date will, as provided in the Indenture,  be paid to the Person
in  whose  name  this  Security  (or  one or  more  Predecessor  Securities)  is
registered at the close of business on the Regular Record Date for such interest
installment,  which  shall be the January 1 or July 1 (whether or not a Business
Day), as the case may be, next  preceding  such Interest  Payment Date. Any such
interest not so punctually paid or duly provided for shall forthwith cease to be
payable to the Holder on such Regular  Record Date and may either be paid to the
Person in whose name this Security (or one or more  Predecessor  Securities)  is
registered at the close of business on a Special  Record Date for the payment of
such  Defaulted  Interest to be fixed by the Trustee,  notice  whereof  shall be
given to  Holders  of  Securities  not less than 10 days  prior to such  Special
Record Date, or be paid at any time in any other lawful manner not  inconsistent
with the  requirements  of any securities  exchange on which the Security may be
listed,  and upon such notice as may be required by such  exchange,  all as more
fully provided in said Indenture.

         So long as no Event of Default  has  occurred  and is  continuing,  the
Corporation  shall have the right, at any time during the term of this Security,
from time to time to defer the payment of interest  on this  Security  for up to
ten  consecutive  semi-annual  interest  payment  periods  with  respect to each
deferral period (each an "Extension Period"), during which Extension Periods the
Corporation  shall have the right to make  partial  payments  of interest on any
Interest  Payment Date,  and at the end of which the  Corporation  shall pay all
interest then accrued and unpaid;  provided,  however,  that no Extension Period
shall extend  beyond the Stated  Maturity of the  principal of this  Security as
then in  effect,  and no such  Extension  Period may end on a date other than an
Interest  Payment  Date;  and provided  further,  however,  that during any such
Extension Period,  the Corporation shall not (i) declare or pay any dividends or
distributions  on, or redeem,  purchase,  acquire or make a liquidation  payment
with  respect  to,  any of the  Corporation's  capital  stock,  or (ii) make any
payment of principal of or interest or premium, if any, on or repay,  repurchase
or redeem any debt  securities  of the  Corporation  that rank pari passu in all
respects with or junior in interest to this Security or (iii) make any guarantee
payments with respect to any guarantee by the Corporation of the debt securities
of any subsidiary of the  Corporation if such guarantee ranks pari passu with or
junior in interest to the Securities  (other than (a) dividends or distributions
in  common  stock of the  Corporation,  (b) any  declaration  of a  dividend  in
connection  with the  implementation  of a  stockholders'  rights  plan,  or the
issuance  of stock  under  any such plan in the  future,  or the  redemption  or
repurchase of any such rights pursuant thereto, (c) payments under the Guarantee
and (d)  purchases  of common  stock  related to the issuance of common stock or
rights under any of the  Corporation's  or its  subsidiaries'  benefit plans for
their  directors,  officers or employees).  Prior to the termination of any such
Extension  Period,  the  Corporation  may further defer the payment of interest,
provided  that no  Extension  Period shall  exceed ten  consecutive  semi-annual
interest payment

                                                         - 17 -






periods,  and shall not extend  beyond the Stated  Maturity of the  principal of
this  Security or end on a date other than an Interest  Payment  Date.  Upon the
termination of any such Extension Period and upon the payment of all accrued and
unpaid interest then due on any Interest Payment Date, the Corporation may elect
to  begin  a  new  Extension  Period,  subject  to  the  above  conditions.  The
Corporation shall give the Holder of this Security and the Trustee notice of its
election to begin any  Extension  Period at least one  Business Day prior to the
next succeeding  Interest  Payment Date on which interest on this Security would
be payable but for such deferral or so long as such  Securities  are held by HSB
Capital  II, at least one  Business  Day  prior to the  earlier  of (i) the next
succeeding date on which  Distributions on the Capital Securities of such Issuer
Trust  would be payable  but for such  deferral,  and (ii) the date on which the
Property  Trustee of such Issuer  Trust is required to give notice to holders of
such Capital  Securities of the record date or the date such  Distributions  are
payable.

         Payment of the principal of (and premium,  if any) and interest on this
Security will be made at the office or agency of the Corporation  maintained for
that  purpose  in New  York,  New York or  Chicago,  Illinois,  in such  coin or
currency  of the  United  States of  America  as at the time of payment is legal
tender for payment of public and private debts;  provided,  however, that at the
option of the Corporation payment of interest may be made (i) by check mailed to
the address of the Person  entitled  thereto as such address shall appear in the
Securities Register,  or (ii) by wire transfer in immediately available funds at
such place and to such  account  as may be  designated  by the  Person  entitled
thereto as specified in the Securities Register.

         The indebtedness  evidenced by this Security is, to the extent provided
in the  Indenture,  subordinate  and  junior  in right of  payment  to the prior
payment in full of all Senior Indebtedness, and ranks pari passu with HSB Group,
Inc.'s Global Floating Rate Junior Subordinated  Debentures,  Series B, and this
Security is issued  subject to the  provisions  of the  Indenture  with  respect
thereto.  Each Holder of this Security, by accepting the same, (a) agrees to and
shall be bound by such  provisions,  (b)  authorizes  and directs the Trustee on
such Holder's  behalf to take such actions as may be necessary or appropriate to
effectuate the  subordination  so provided,  and (c) appoints the Trustee his or
her attorney-in-fact for any and all such purposes.  Each Holder hereof, by such
Holder's  acceptance  hereof,  waives  all  notice  of  the  acceptance  of  the
subordination provisions contained herein and in the Indenture by each holder of
Senior Indebtedness,  whether now outstanding or hereafter incurred,  and waives
reliance by each such holder upon said provisions.

         Reference is hereby made to the further provisions of this Security set
forth on the reverse  hereof,  which further  provisions  shall for all purposes
have the same effect as if set forth at this place.

         Unless the  certificate of  authentication  hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Security
shall  not be  entitled  to any  benefit  under  the  Indenture  or be  valid or
obligatory for any purpose.


                                                         - 18 -






         IN WITNESS  WHEREOF,  the  Corporation has caused this instrument to be
duly executed under its corporate seal.

                                             HSB GROUP, INC.


                                             By:        --------------------
                                             Name:      Saul L. Basch
                                             Title:     Senior Vice President,
                                                        Treasurer and Chief
                                                        Financial Officer

Attest:

- -------------------
Corporate Secretary

         SECTION 2.3.  Form of Reverse of Security.

         This  Security  is  a  duly  authorized  issue  of  securities  of  the
Corporation  (herein called the  "Securities"),  limited in aggregate  principal
amount to  $309,300,000,  issued under the  Indenture,  dated as of December 31,
1997 (herein  called the  "Indenture"),  between the  Corporation  and The First
National Bank of Chicago,  as Trustee  (herein called the "Trustee",  which term
includes any successor trustee under the Indenture),  to which Indenture and all
indentures  supplemental thereto reference is hereby made for a statement of the
respective rights,  limitations of rights,  duties and immunities  thereunder of
the Corporation, the Trustee, the holders of Senior Indebtedness and the Holders
of the  Securities,  and of the terms upon which the Securities  are, and are to
be, authenticated and delivered.

         All terms used in this Security that are defined in the Indenture or in
the Trust  Agreement,  dated as of December  31, 1997 (as  modified,  amended or
supplemented from time to time, the "Trust Agreement"),  relating to HSB Capital
II (the "Issuer Trust") among the Corporation,  as Depositor, the Trustees named
therein  and the  Holders  from  time to time  of the  Trust  Securities  issued
pursuant  thereto,  shall have the meanings assigned to them in the Indenture or
the Trust Agreement, as the case may be.

         The  Corporation  may  at any  time,  at its  option,  (i) on or  after
December 31, 2004 or (ii) for a reason specified in Article XI of the Indenture,
in  both  cases  subject  to the  terms  and  conditions  of  Article  XI of the
Indenture,  redeem  this  Security  in whole at any time or in part from time to
time  at a  Redemption  Price  equal  to 100% of the  principal  amount  hereof,
together,  in the case of any such  redemption,  with  accrued  interest  to but
excluding the Redemption Date fixed for redemption.


                                                         - 19 -






         Under limited circumstances,  Employers Reinsurance Corporation may, at
its  option  and  subject  to the  terms and  conditions  of  Article  XI of the
Indenture,  require  the  Corporation  to redeem this  Security  in whole,  at a
Redemption Price as stated in Section 11.8 of the Indenture.

         In addition,  upon the occurrence and during the  continuation of a Tax
Event in respect of the Issuer Trust, the Corporation may, at its option, at any
time within 90 days of the  occurrence and during the  continuation  of such Tax
Event, redeem this Security,  in whole but not in part, subject to the terms and
conditions of Article XI of the Indenture,  at a Redemption  Price equal to 100%
of the principal amount of the 7.0% Convertible Subordinated Deferrable Interest
Debentures so redeemed plus accrued and unpaid  interest  thereon to the date of
redemption.

         In the  event  of  redemption  of this  Security  in part  only,  a new
Security or Securities for the  unredeemed  portion hereof will be issued in the
name of the Holder hereof upon the cancellation hereof.

         The Indenture contains provisions for satisfaction and discharge of the
entire  indebtedness of this Security upon  compliance by the  Corporation  with
certain conditions set forth in the Indenture.

         The Indenture permits, with certain exceptions as therein provided, the
Corporation  and the Trustee at any time to enter into a supplemental  indenture
or  indentures  for the  purpose  of  modifying  in any  manner  the  rights and
obligations of the Corporation  and of the Holders of the  Securities,  with the
consent of the  Holders of not less than a majority in  principal  amount of the
Outstanding  Securities  to be  affected  by such  supplemental  indenture.  The
Indenture also contains provisions  permitting Holders of specified  percentages
in principal amount of the Securities at the time Outstanding,  on behalf of the
Holders of all Securities,  to waive  compliance by the Corporation with certain
provisions of the  Indenture  and certain past defaults  under the Indenture and
their  consequences.  Any such consent or waiver by the Holder of this  Security
shall be conclusive  and binding upon such Holder and upon all future Holders of
this  Security  and of any  Security  issued upon the  registration  of transfer
hereof or in exchange hereof or in lieu hereof,  whether or not notation of such
consent or waiver is made upon this Security.

         As provided in and subject to the  provisions of the  Indenture,  if an
Event of Default with respect to the Securities at the time  Outstanding  occurs
and is continuing, then and in every such case the Trustee or the Holders of not
less than 25% in aggregate  principal  amount of the Outstanding  Securities may
declare the  principal  amount of all the  Outstanding  Securities to be due and
payable  immediately,  by a notice in  writing  to the  Corporation  (and to the
Trustee if given by Holders),  provided  that, if upon an Event of Default,  the
Trustee or such  Holders fail to declare the  principal  of all the  Outstanding
Securities  to be  immediately  due and payable,  the holders of at least 25% in
aggregate  Liquidation  Amount of the Capital  Securities then Outstanding shall
have  the  right  to  make  such  declaration  by a  notice  in  writing  to the
Corporation and the Trustee;  and upon any such declaration the principal of and
the accrued  interest on all the  Securities  shall become  immediately  due and
payable, provided that the

                                                         - 20 -






payment  of  such  principal  and  interest  on  such  Securities  shall  remain
subordinated to the extent provided in Article XII of the Indenture.

         Subject to the terms and  conditions  set forth in Article  XIII of the
Indenture,  this  Security is  convertible,  at the option of the  Holder,  into
shares of Common Stock.

         No reference  herein to the Indenture and no provision of this Security
or of the Indenture  shall alter or impair the  obligation  of the  Corporation,
which is absolute and  unconditional,  to pay the principal of (and premium,  if
any) and interest on this Security at the times, place and rate, and in the coin
or currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
set forth,  the  transfer of this  Security  is  registrable  in the  Securities
Register,  upon surrender of this Security for  registration  of transfer at the
office  or  agency  of the  Corporation  maintained  under  Section  10.2 of the
Indenture  for such  purpose,  duly  endorsed  by, or  accompanied  by a written
instrument  of  transfer  in  form  satisfactory  to  the  Corporation  and  the
Securities  Registrar  duly  executed  by,  the Holder  hereof or such  Holder's
attorney duly  authorized in writing,  and thereupon one or more new Securities,
of like tenor, of authorized  denominations and for the same aggregate principal
amount, will be issued to the designated transferee or transferees.

         The Securities are issuable only in registered  form without coupons in
denominations  of  $10,000,000  and any integral  multiple of $100,000 in excess
thereof. As provided in the Indenture and subject to certain limitations therein
set forth,  Securities are exchangeable for a like aggregate principal amount of
Securities  and  of  like  tenor  of a  different  authorized  denomination,  as
requested by the Holder surrendering the same.

         No service charge shall be made for any such  registration  of transfer
or exchange,  but the  Corporation  may require  payment of a sum  sufficient to
cover any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Security for registration of transfer,
the Corporation, the Trustee and any agent of the Corporation or the Trustee may
treat the Person in whose name this  Security is  registered as the owner hereof
for all  purposes,  whether or not this  Security  be  overdue,  and neither the
Corporation,  the  Trustee nor any such agent shall be affected by notice to the
contrary.

         The Corporation and, by its acceptance of this Security or a beneficial
interest  therein,  the Holder of, and any  Person  that  acquires a  beneficial
interest in, this Security agree that for United States Federal, state and local
tax purposes it is intended that this Security constitute indebtedness.

         THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK.


                                                         - 21 -







         SECTION 2.4.  Restrictive Legends.

                  Restricted  Securities  shall bear the  following  legend (the
"Restricted  Securities Legend") unless the Corporation  determines otherwise in
accordance with applicable law:

                  "THE CONVERTIBLE  SUBORDINATED  DEFERRABLE INTEREST DEBENTURES
         EVIDENCED  HEREBY AND THE COMMON STOCK  ISSUABLE UPON THEIR  CONVERSION
         HAVE NOT BEEN  REGISTERED  UNDER THE U.S.  SECURITIES  ACT OF 1933,  AS
         AMENDED (THE "SECURITIES  ACT"), AND MAY NOT BE OFFERED,  SOLD, PLEDGED
         OR OTHERWISE TRANSFERRED EXCEPT IN WHOLE OR IN PART (BUT IF IN PART, IN
         AMOUNTS  NOT LESS THAN  $10,000,000  IN  PRINCIPAL  AMOUNT) AND ONLY IN
         COMPLIANCE  WITH THE  REQUIREMENTS OF THE SECURITIES ACT OR PURSUANT TO
         AN APPLICABLE EXEMPTION THEREFROM."

         SECTION 2.5.  Form of Trustee's Certificate of Authentication.

         The Trustee's  certificates of authentication shall be in substantially
the following form:

         This is one of the  Securities  designated  therein  referred to in the
within-mentioned Indenture.

Dated:  December 31, 1997

                                        ----------------------------
                                        as Trustee

                                        By:
                                        Authorized Officer


                                   ARTICLE III

                                 THE SECURITIES

         SECTION 3.1.  Title and Terms.

         The aggregate  principal amount of Securities that may be authenticated
and  delivered  under this  Indenture  is  $309,300,000,  except for  Securities
authenticated  and delivered upon  registration  of, transfer of, or in exchange
for, or in lieu of, other Securities pursuant to Sections 3.4, 3.5 or 3.6.



                                                         - 22 -






         SECTION 3.2.  Denominations.

         The Securities shall be in registered form without coupons and shall be
issuable in denominations  of $10,000,000 and any integral  multiple of $100,000
thereof.

         SECTION 3.3.  Execution, Authentication and Dating.

         The  Securities  shall be executed on behalf of the  Corporation by its
Chief Executive  Officer,  its President or one of its Senior Vice Presidents or
Vice Presidents and attested by its Corporate  Secretary or one of its Assistant
Secretaries.  The signature of any of these  officers on the  Securities  may be
manual or facsimile.

         Securities  bearing the manual or facsimile  signatures of  individuals
who were at any time the  proper  officers  of the  Corporation  shall  bind the
Corporation, notwithstanding that such individuals or any of them have ceased to
hold such offices prior to the authentication and delivery of such Securities or
did not hold such offices at the date of such  Securities.  At any time and from
time to time after the execution and delivery of this Indenture, the Corporation
may  deliver  Securities   executed  by  the  Corporation  to  the  Trustee  for
authentication,  together with a Corporation  Order for the  authentication  and
delivery of such Securities,  and the Trustee in accordance with the Corporation
Order  shall  authenticate  and  deliver  such  Securities.  Securities  may  be
authenticated on original  issuance from time to time and delivered  pursuant to
such  procedures  acceptable to the Trustee  ("Procedures")  as may be specified
from time to time by Corporation Order. Procedures may authorize  authentication
and  delivery  pursuant  to  oral  instructions  of  the  Corporation  or a duly
authorized agent, which instructions shall be promptly confirmed in writing.

         Each Security shall be dated the date of its authentication.

         No Security shall be entitled to any benefit under this Indenture or be
valid or  obligatory  for any purpose,  unless there  appears on such Security a
certificate  of  authentication  substantially  in the form  provided for herein
executed  by  the  Trustee  by the  manual  signature  of one of its  authorized
officers,  and such certificate upon any Security shall be conclusive  evidence,
and the only  evidence,  that  such  Security  has been duly  authenticated  and
delivered hereunder.  Notwithstanding the foregoing,  if any Security shall have
been  authenticated  and  delivered  hereunder  but never issued and sold by the
Corporation,  and the Corporation shall deliver such Security to the Trustee for
cancellation as provided in Section 3.9, for all purposes of this Indenture such
Security  shall  be  deemed  never  to have  been  authenticated  and  delivered
hereunder and shall never be entitled to the benefits of this Indenture.

         SECTION 3.4.  Temporary Securities.

         Pending the preparation of definitive  Securities,  the Corporation may
execute,  and upon Corporation Order the Trustee shall authenticate and deliver,
temporary Securities that are printed, lithographed,  typewritten,  mimeographed
or otherwise produced, in any denomination,

                                                         - 23 -






substantially  of the tenor of the  definitive  Securities in lieu of which they
are issued and with such appropriate  insertions,  omissions,  substitutions and
other  variations as the officers  executing such  Securities may determine,  as
evidenced by their execution of such Securities.

         If  temporary   Securities  are  issued,  the  Corporation  will  cause
definitive  Securities  to be prepared  without  unreasonable  delay.  After the
preparation  of  definitive  Securities,   the  temporary  Securities  shall  be
exchangeable   for  definitive   Securities  upon  surrender  of  the  temporary
Securities  at the  office  or  agency of the  Corporation  designated  for that
purpose without charge to the Holder. Upon surrender for cancellation of any one
or more  temporary  Securities,  the  Corporation  shall execute and the Trustee
shall  authenticate  and deliver in  exchange  therefor  one or more  definitive
Securities  of  any  authorized  denominations,  of  like  tenor  and  aggregate
principal  amount,  bearing such restrictive  legends as may be required by this
Indenture  and  bearing a number  not  contemporaneously  outstanding.  Until so
exchanged,  the  temporary  Securities  shall in all respects be entitled to the
same benefits under this Indenture as definitive Securities.

         SECTION 3.5.  Registration, Transfer and Exchanges.

         (a)  Registration,  Transfer and Exchange  Generally.  The  Corporation
shall cause to be kept at the  Corporate  Trust Office of the Trustee a register
or registers  (the  "Securities  Register")  in which the registrar and transfer
agent with respect to the Securities (the  "Securities  Registrar"),  subject to
such  reasonable  regulations  as  it  may  prescribe,  shall  provide  for  the
registration  of  Securities  and of transfers  and  exchanges of  Securities as
herein provided.  The Trustee is hereby appointed  Securities  Registrar for the
purpose of  registering  Securities and transfers and exchanges of Securities as
herein provided.

         Upon  surrender  for  registration  of transfer of any  Security at the
office or agency of the Corporation designated for that purpose, the Corporation
shall execute,  and the Trustee shall  authenticate and deliver,  in the name of
the  designated  transferee or  transferees,  one or more new  Securities of any
authorized denominations,  of like tenor and aggregate principal amount, bearing
such  restrictive  legends as may be  required by this  Indenture  and bearing a
number not contemporaneously outstanding.

         At the option of the  Holder,  Securities  may be  exchanged  for other
Securities  of  any  authorized  denominations,  of  like  tenor  and  aggregate
principal  amount,  bearing such restrictive  legends as may be required by this
Indenture and bearing a number not contemporaneously outstanding, upon surrender
of the  Securities  to be  exchanged  at such  office or  agency.  Whenever  any
Securities are so surrendered for exchange,  the Corporation shall execute,  and
the Trustee  shall  authenticate  and deliver,  the  Securities  that the Holder
making the exchange is entitled to receive.

         All Securities issued upon any transfer or exchange of Securities shall
be the valid  obligations  of the  Corporation,  evidencing  the same debt,  and
entitled  to  the  same  benefits  under  this  Indenture,   as  the  Securities
surrendered upon such transfer or exchange.

                                                         - 24 -







         Neither the Corporation, the Trustee nor the Securities Registrar shall
be  required,  pursuant to the  provisions  of this  Section  3.5, (i) to issue,
register the transfer of or exchange any Security  during a period  beginning at
the opening of business 15 days before the day of selection  for  redemption  of
Securities pursuant to Article XI and ending at the close of business on the day
of mailing of the notice of  redemption,  or (ii) to register the transfer of or
exchange any Security so selected for redemption in whole or in part, except, in
the case of any such Security to be redeemed in part, any portion thereof not to
be redeemed.

         Every Security presented or surrendered for registration of transfer or
exchange  shall (if so  required  by the  Corporation  or the  Trustee)  be duly
endorsed,  or be  accompanied  by a  written  instrument  of  transfer  in  form
satisfactory to the Corporation and the Securities  Registrar,  duly executed by
the Holder thereof or such Holder's attorney duly authorized in writing.

         No service  charge  shall be made to a Holder for any  registration  of
transfer or exchange of Securities, but the Corporation may require payment of a
sum sufficient to cover any tax or other governmental charge that may be imposed
in connection with any transfer or exchange of Securities.

         (b)   Registration,   Transfer,   and  Exchange.   A  Security  may  be
transferred,  in whole or in part, to a Person who takes delivery in the form of
another  Security,   provided  that  the  following  provisions  are  met.  When
Securities  are presented to the  Securities  Registrar  with a request:  (1) to
register the transfer of such Securities; or (2) to exchange such Securities for
Securities  in an  equal  aggregate  principal  amount  of  Securities  of other
authorized  denominations,  the Securities Registrar shall register the transfer
or make the exchange as requested if the  requirements  for such transaction are
met;  provided,  however,  that  the  Securities  surrendered  for  transfer  or
exchange:

                           (A)  shall  be  duly  endorsed  or  accompanied  by a
                  written instrument of transfer in form reasonably satisfactory
                  to the Trustee and the Securities Registrar,  duly executed by
                  the Holder thereof or his attorney duly authorized in writing,
                  delivered to the  Corporation at least 30 Business Days before
                  such intended  transfer,  and the  Corporation  shall not have
                  delivered a written notice of objection to the Holder within 5
                  Business Days prior to the intended transfer,  which notice of
                  objection  shall state  whether the  Corporation  is objecting
                  pursuant to subsection (D) or (E) below;

                           (B) in the case of Restricted  Securities,  are being
                  transferred  in  compliance  with  the   requirements  of  the
                  Securities   Act  or  pursuant  to  an  applicable   exemption
                  therefrom  and are  accompanied  by the  following  additional
                  information and documents:  a Restricted Security Certificate,
                  satisfactory   to  the  Trustee  and  duly   executed  by  the
                  transferor  Holder or his attorney duly authorized in writing,
                  in the  form  attached  hereto  as  Exhibit  A (a  "Restricted
                  Securities  Transfer  Certificate")  and an Opinion of Counsel
                  reasonably acceptable to the Corporation and to the Securities
                  Registrar to the effect that such transfer is in

                                                         - 25 -






                  compliance   with  the  Securities  Act,  in  which  case  the
                  transferee  Holder  shall  take  delivery  in  the  form  of a
                  Restricted Security, subject to Section 3.5(c);

                           (C) shall be  accompanied  by a  statement  that such
                  transferee  agrees  in  writing  to be bound by the  terms and
                  provisions of the Trust Agreement and the Purchase Agreement;

                           (D) shall be subject to the right of the  Corporation
                  to veto  the  Holder's  choice  of  such  Person  to whom  the
                  proposed  transfer or disposition is to occur by giving notice
                  of such objection to the Holder as described in (A) above; and

                           (E) shall,  pursuant  to Section  4.2(a)(iii)  of the
                  Trust Agreement, be subject to the right of the Corporation to
                  cause the Issuer Trust to redeem at a Redemption  Price stated
                  in Section 11.7,  the Security or Securities  surrendered  for
                  transfer or exchange by giving notice of such objection to the
                  Holder as described in (A) above.

                  (c)  Securities  Act Legends.  Except as set forth below,  all
Securities or a new Security that is issued in exchange for another  Security or
any  portion  thereof,  upon  transfer  or  otherwise,  shall bear a  Restricted
Securities Legend:


                  (i) At any time after the Securities may be freely transferred
         without  registration under the Securities Act or without being subject
         to transfer restrictions pursuant to the Securities Act, a new Security
         which does not bear a  Securities  Act Legend may be issued in exchange
         for or in lieu of a Security or any portion  thereof which bears such a
         legend if the  Corporation  has received  from the Holder an Opinion of
         Counsel as  described in  subsection  (vi) below and if the Trustee has
         received an Unrestricted Securities Transfer Certificate in the form of
         Exhibit B hereto (an "Unrestricted  Securities Transfer  Certificate"),
         satisfactory  to the  Trustee  and duly  executed by the Holder of such
         legended Security or his attorney duly authorized in writing, and after
         such  date  and  receipt  of  such   certificate,   the  Trustee  shall
         authenticate and deliver such a new Security in exchange for or in lieu
         of such other Security as provided in this section;

                  (ii) a new Security that does not bear a Restricted Securities
         Legend  may be  issued  in  exchange  for or in  lieu  of a  Restricted
         Security or any portion  thereof that bears such a legend if, after the
         receipt by the  Corporation  of an Opinion of Counsel as  described  in
         subsection (vi) below, in the Corporation's sole judgment, placing such
         a legend  upon such new  Security is not and will not be  necessary  to
         ensure compliance with the registration  requirements of the Securities
         Act, and the Trustee,  at the written  direction of the  Corporation in
         the form of an Officers'  Certificate,  shall  authenticate and deliver
         such a new Security as provided in this section;



                                                         - 26 -






                  (iii) Securities distributed to a holder of Capital Securities
         upon dissolution of the Issuer Trust shall bear a Restricted Securities
         Legend if the Capital Securities so held bear a similar legend; and

                  (iv) The Holder  agrees  that it will not effect the  proposed
         transfer or  disposition of the Security until such Holder has provided
         to the  Corporation  an  Opinion of  Counsel  satisfactory  in form and
         substance to the Corporation that such proposed disposition or transfer
         is exempt from registration under the Securities Act and any applicable
         state  securities  laws. The Corporation  shall use its best efforts to
         comply  with  any  state  securities  laws,  but  shall  in no event be
         required,  in  connection  therewith,  to qualify to do business in any
         state where it is not then  qualified  or to take any action that would
         subject  it to tax or to the  general  service  of process in any state
         where it is not then subject.

         SECTION 3.6.  Mutilated, Destroyed, Lost and Stolen Securities.

         If any mutilated  Security is surrendered to the Trustee  together with
such security or indemnity as may be required by the  Corporation or the Trustee
to save each of them  harmless,  the  Corporation  shall execute and the Trustee
shall  authenticate  and deliver in exchange  therefor a new  Security,  of like
tenor and aggregate  principal amount,  bearing the same legends,  and bearing a
number not contemporaneously outstanding.

         If there shall be delivered to the  Corporation  and to the Trustee (i)
evidence  to  their  satisfaction  of the  destruction,  loss  or  theft  of any
Security, and (ii) such security or indemnity as may be required by them to save
each of them harmless,  then, in the absence of notice to the Corporation or the
Trustee  that such  Security  has been  acquired by a bona fide  purchaser,  the
Corporation  shall execute and upon its request the Trustee  shall  authenticate
and  deliver,  in lieu of any such  destroyed,  lost or stolen  Security,  a new
Security, of like tenor and aggregate principal amount, bearing the same legends
as  such  destroyed,   lost  or  stolen  Security,  and  bearing  a  number  not
contemporaneously outstanding.

         If any such mutilated, destroyed, lost or stolen Security has become or
is about to become due and  payable,  the  Corporation  in its  discretion  may,
instead of issuing a new Security, pay such Security.

         Upon the  issuance of any new  Security  under this  Section  3.6,  the
Corporation  may  require the  payment of a sum  sufficient  to cover any tax or
other governmental  charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

         Every new  Security  issued  pursuant  to this  Section  in lieu of any
destroyed,  lost or stolen  Security  shall  constitute  an original  additional
contractual obligation of the Corporation, whether or not the destroyed, lost or
stolen Security shall be at any time enforceable by anyone, and shall

                                                         - 27 -






be entitled to the same benefits of this Indenture  equally and  proportionately
with any and all other Securities duly issued hereunder.

         The provisions of this Section 3.6 are exclusive and shall preclude (to
the extent lawful) all other rights and remedies with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities.

         SECTION 3.7.  Payment of Interest; Interest Rights Preserved.

         Interest on any Security  that is payable,  and is  punctually  paid or
duly provided for, on any Interest  Payment Date, shall be paid to the Person in
whose name that Security (or one or more  Predecessor  Securities) is registered
at the close of business on the Regular Record Date for such interest in respect
of such Securities,  except that,  unless otherwise  provided in the Securities,
interest  payable on the Stated Maturity of the principal of a Security shall be
paid to the Person to whom principal is paid. The initial payment of interest on
any  Security  that is  issued  between a Regular  Record  Date and the  related
Interest Payment Date shall be payable as provided in such Security.

         Any interest on any Security that is due and payable, but is not timely
paid or duly provided for, on any Interest  Payment Date for Securities  (herein
called  "Defaulted  Interest"),  shall  forthwith  cease  to be  payable  to the
registered  Holder on the relevant  Regular Record Date by virtue of having been
such Holder, and such Defaulted Interest may be paid by the Corporation,  at its
election in each case, as provided in Clause (1) or (2) below:

                  (1) The Corporation may elect to make payment of any Defaulted
         Interest  to the  Persons  in whose  names  the  Securities  (or  their
         respective  Predecessor  Securities)  are  registered  at the  close of
         business on a Special  Record  Date for the  payment of such  Defaulted
         Interest, which shall be fixed in the following manner. The Corporation
         shall notify the Trustee in writing of the amount of Defaulted Interest
         proposed  to be paid  on each  Security  and the  date of the  proposed
         payment,  and at the same time the  Corporation  shall deposit with the
         Trustee an amount of money equal to the aggregate amount proposed to be
         paid in respect of such Defaulted  Interest or shall make  arrangements
         satisfactory  to the Trustee for such deposit  prior to the date of the
         proposed payment, such money when deposited to be held in trust for the
         benefit of the Persons entitled to such Defaulted  Interest as provided
         in this Clause (1).  Thereupon the Trustee  shall fix a Special  Record
         Date for the  payment of such  Defaulted  Interest,  which shall be not
         more  than 15 days and not less  than 10 days  prior to the date of the
         proposed  payment  and not less than 10 days  after the  receipt by the
         Trustee  of the  notice of the  proposed  payment.  The  Trustee  shall
         promptly notify the Corporation of such Special Record Date and, in the
         name and at the expense of the  Corporation,  shall cause notice of the
         proposed payment of such Defaulted Interest and the Special Record Date
         therefor to be mailed, first-class postage prepaid, to each Holder of a
         Security at the address of such Holder as it appears in the  Securities
         Register not less than 10 days prior to such Special  Record Date.  The
         Trustee may, in its discretion, in the name and at the expense

                                                         - 28 -






         of the  Corporation,  cause a similar  notice to be  published at least
         once in a newspaper,  customarily  published in the English language on
         each  Business  Day  and  of  general  circulation  in the  Borough  of
         Manhattan,  The City of New York, but such  publication  shall not be a
         condition  precedent to the  establishment of such Special Record Date.
         Notice of the  proposed  payment  of such  Defaulted  Interest  and the
         Special  Record Date  therefor  having been mailed as  aforesaid,  such
         Defaulted  Interest  shall be paid to the  Persons  in whose  names the
         Securities (or their respective Predecessor  Securities) are registered
         on such Special Record Date and shall no longer be payable  pursuant to
         the following Clause (2).

                  (2) The Corporation may make payment of any Defaulted Interest
         in any other lawful manner not  inconsistent  with the  requirements of
         any  securities  exchange on which the  Securities  in respect of which
         interest is in default  may be listed  and,  upon such notice as may be
         required by such exchange (or by the Trustee if the  Securities are not
         listed),  if, after notice given by the  Corporation  to the Trustee of
         the proposed payment pursuant to this Clause (2), such payment shall be
         deemed practicable by the Trustee.

         Subject to the foregoing  provisions of this Section 3.7, each Security
delivered under this Indenture upon transfer of or in exchange for or in lieu of
any other Security shall carry the rights to interest accrued and unpaid, and to
accrue, that were carried by such other Security.

         SECTION 3.8.  Persons Deemed Owners.

         The  Corporation,  the Trustee and any agent of the  Corporation or the
Trustee  shall treat the Person in whose name any Security is  registered as the
owner of such Security for the purpose of receiving  payment of principal of and
(subject  to  Section  3.7) any  interest  on such  Security  and for all  other
purposes  whatsoever,  whether or not such Security be overdue,  and neither the
Corporation,  the Trustee nor any agent of the  Corporation or the Trustee shall
be affected by notice to the contrary.

         SECTION 3.9.  Cancellation.

         All  Securities  surrendered  for  payment,  redemption,   transfer  or
exchange  shall,  if  surrendered  to any  Person  other  than the  Trustee,  be
delivered to the Trustee,  and any such  Securities and  Securities  surrendered
directly to the Trustee for any such purpose  shall be promptly  canceled by it.
The  Corporation  may at any time  deliver to the Trustee for  cancellation  any
Securities previously authenticated and delivered hereunder that the Corporation
may have  acquired in any manner  whatsoever,  and all  Securities  so delivered
shall be promptly canceled by the Trustee.  No Securities shall be authenticated
in lieu of or in  exchange  for any  Securities  canceled  as  provided  in this
Section 3.9,  except as  expressly  permitted  by this  Indenture.  All canceled
Securities  shall be destroyed by the Trustee and the Trustee  shall  deliver to
the Corporation a certificate of such destruction.


                                                         - 29 -






         SECTION 3.10.  Computation of Interest.

          Interest on the Securities for any partial period shall be computed on
the basis of a 360- day year of twelve  30-day  months and the actual  number of
days elapsed in any partial month in such period, and interest on the Securities
for a full period shall be computed by dividing the rate per annum by the number
of interest periods that together constitute a full twelve months.

         SECTION 3.11.  Deferrals of Interest Payment Dates.

          So long as no Event of Default has  occurred  and is  continuing,  the
Corporation shall have the right, at any time during the term, from time to time
to defer the payment of interest on such  Securities  for up to ten  consecutive
semi-annual  interest  payment periods with respect to each such deferral period
(each, an "Extension  Period"),  during which Extension  Periods the Corporation
shall  have the right to make  partial  payments  of  interest  on any  Interest
Payment  Date.  No  Extension  Period shall end on a date other than an Interest
Payment Date. At the end of any such Extension Period the Corporation  shall pay
all interest then accrued and unpaid on the Securities;  provided, however, that
no Extension  Period shall extend beyond the Stated Maturity of the principal of
the  Securities;  and provided  further,  however that during any such Extension
Period,  the  Corporation  shall  not  (i)  declare  or  pay  any  dividends  or
distributions  on, or redeem,  purchase,  acquire or make a liquidation  payment
with  respect  to,  any of the  Corporation's  capital  stock,  or (ii) make any
payment of principal of or interest or premium, if any, on or repay,  repurchase
or redeem any debt  securities  of the  Corporation  that rank pari passu in all
respects  with or junior in interest  to the  Securities  or make any  guarantee
payments with respect to any guarantee by the Corporation of the debt securities
of any Subsidiary of the  Corporation if such guarantee ranks pari passu with or
junior in interest to the Securities  (other than (a) dividends or distributions
of  Common  Stock of the  Corporation,  (b) any  declaration  of a  dividend  in
connection  with the  implementation  of a  stockholders'  rights  plan,  or the
issuance of Common Stock under any such plan in the future, or the redemption or
repurchase of any such rights pursuant thereto, (c) payments under the Guarantee
Agreement  and (d)  purchases of Common Stock  related to the issuance of Common
Stock  or  rights  under  any of the  Corporation's  or  any  Subsidiary  of the
Corporation's benefit plans for their directors, officers or employees. Prior to
the termination of any such Extension Period,  the Corporation may further defer
the payment of interest,  provided  that no Event of Default has occurred and is
continuing,  and  provided  further  that no  Extension  Period shall exceed the
period or  periods  specified  in such  Securities,  extend  beyond  the  Stated
Maturity  of the  principal  of such  Securities  or end on a date other than an
Interest  Payment Date.  Upon the  termination of any such Extension  Period and
upon the  payment of all accrued and unpaid  interest  then due on any  Interest
Payment Date, the Corporation may elect to begin a new Extension Period, subject
to  the  above  conditions.  The  Corporation  shall  give  the  Holders  of the
Securities  and the Trustee  notice of its election to begin any such  Extension
Period at least one Business Day prior to the next succeeding  Interest  Payment
Date on which  interest on Securities  would be payable but for such deferral or
so long as any such  Securities  are held by such  Issuer  Trust,  at least  one
Business  Day  prior to the  earlier  of (i) the next  succeeding  date on which
Distributions  on the Capital  Securities  of such Issuer Trust would be payable
but for such deferral, and (ii) the date

                                                         - 30 -






on which the Property Trustee of such Issuer Trust is required to give notice to
holders  of  such  Capital  Securities  of the  record  date  or the  date  such
Distributions are payable.

         The Trustee shall promptly give notice of the Corporation's election to
begin any such Extension Period to the Holders of the Outstanding Securities.

         SECTION 3.12.  Right of Set-Off.

          Notwithstanding anything to the contrary herein, the Corporation shall
have the  right  to set off any  payment  it is  otherwise  required  to make in
respect of any such Security to the extent the Corporation has theretofore made,
or is  concurrently  on the date of such  payment  making,  a payment  under the
Guarantee  Agreement  relating  to  such  Security  or to a  holder  of  Capital
Securities pursuant to an action undertaken under Section 5.8 of this Indenture.

         SECTION 3.13.  Agreed Tax Treatment.

         Each Security issued  hereunder shall provide that the Corporation and,
by its acceptance of a Security or a beneficial interest therein, the Holder of,
and any Person that acquires a beneficial  interest in, such Security agree that
for United States federal, state and local tax purposes it is intended that such
Security constitutes indebtedness.

         SECTION 3.14.  Shortening of Stated Maturity.

         If specified or as contemplated  by Section 2.1, the Corporation  shall
have the right to shorten the Stated Maturity of the principal of the Securities
at any time to any date.

         SECTION 3.15.  CUSIP Numbers.

         The  Corporation in issuing the Securities may (but is not required to)
use "CUSIP"  numbers (if then  generally in use),  and, if so, the Trustee shall
use  "CUSIP"  numbers  in  notices of  redemption  and other  similar or related
materials as a  convenience  to Holders;  provided that any such notice or other
materials may state that no representation is made as to the correctness of such
numbers  either as printed on the  Securities  or as  contained in any notice of
redemption or other  materials and that reliance may be placed only on the other
identification numbers printed on the Securities,  and any such redemption shall
not be affected by any defect in or omission of such numbers.


                                   ARTICLE IV

                           SATISFACTION AND DISCHARGE

         SECTION 4.1.  Satisfaction and Discharge of Indenture.


                                                         - 31 -






         This Indenture shall, upon Corporation Request,  cease to be of further
effect  (except  as to any  surviving  rights of  registration  of  transfer  or
exchange of Securities herein expressly  provided for and as otherwise  provided
in this  Section  4.1) and the  Trustee,  on demand of and at the expense of the
Corporation,  shall execute proper  instruments  acknowledging  satisfaction and
discharge of this Indenture, when

                  (1) either

                           (A)(1) all Securities  theretofore  authenticated and
                  delivered (other than (i) Securities that have been destroyed,
                  lost or stolen and that have been replaced or paid as provided
                  in Section 3.6 and (ii) Securities for whose payment money has
                  theretofore  been deposited in trust or segregated and held in
                  trust  by  the  Corporation  and  thereafter   repaid  to  the
                  Corporation  or  discharged  from such  trust,  as provided in
                  Section   10.3)  have  been   delivered  to  the  Trustee  for
                  cancellation; or

                         (B) all such  Securities not  theretofore  delivered to
                  the Trustee for cancellation

                                    (i) have become due and payable, or

                                    (ii) will  become  due and  payable at their
                           Stated  Maturity  within  one  year  of the  date  of
                           deposit, or

                                    (iii) are to be called for redemption within
                           one  year  under  arrangements  satisfactory  to  the
                           Trustee for the giving of notice of redemption by the
                           Trustee  in the  name,  and at  the  expense,  of the
                           Corporation, or

                                    (iv) are tendered for conversion pursuant to
                           Section 13.2,

         and the  Corporation,  in the case of subclause  (B)(i),  (ii) or (iii)
         above,  has  deposited  or caused to be  deposited  with the Trustee as
         trust  funds in trust for such  purpose  an amount in the  currency  or
         currencies in which the  Securities  are payable  sufficient to pay and
         discharge the entire  indebtedness  on such  Securities not theretofore
         delivered to the Trustee for cancellation,  for principal (and premium,
         if any)  and  interest  to the  date of such  deposit  (in the  case of
         Securities  that have become due and payable) or to the Stated Maturity
         or Redemption Date, as the case may be;

               (2) the  Corporation has paid or caused to be paid all other sums
          payable hereunder by the Corporation; and


                                                         - 32 -






                  (3) the  Corporation has delivered to the Trustee an Officers'
         Certificate  and an Opinion of Counsel each stating that all conditions
         precedent   herein  provided  for  relating  to  the  satisfaction  and
         discharge of this Indenture have been complied with.

Notwithstanding   the  satisfaction   and  discharge  of  this  Indenture,   the
obligations of the Corporation to the Trustee under Section 6.7, the obligations
of the  Trustee to any  Authenticating  Agent under  Section  6.14 and, if money
shall have been deposited  with the Trustee  pursuant to subclause (B) of Clause
(1) of this Section 4.1, the  obligations  of the Trustee  under Section 4.2 and
the last paragraph of Section 10.3 shall survive.

         SECTION 4.2.  Application of Trust Money.

         Subject to the  provisions of the last  paragraph of Section 10.3,  all
money deposited with the Trustee  pursuant to Section 4.1 shall be held in trust
and applied by the Trustee,  in accordance with the provisions of the Securities
and this Indenture,  to the payment, either directly or through any Paying Agent
(including  the  Corporation  acting as its own Paying Agent) as the Trustee may
determine,  to the Persons entitled thereto,  of the principal (and premium,  if
any) and interest for the payment of which such money or  obligations  have been
deposited with or received by the Trustee.


                                    ARTICLE V

                                    REMEDIES

         SECTION 5.1.  Events of Default.

         "Event  of  Default",   wherever   used  herein  with  respect  to  the
Securities,  means any one of the following events (whatever the reason for such
Event of Default and whether it shall be voluntary or involuntary or be effected
by operation of law or pursuant to any judgment, decree or order of any court or
any order, rule or regulation of any administrative or governmental body):

                  (1) default in the payment of any  interest  upon any Security
         when it becomes due and payable,  and continuance of such default for a
         period of 30 days  (subject to the  deferral of any due date in respect
         of any interest in the case of an Extension Period); or

               (2) default in the payment of the  principal of (or  premium,  if
          any, on) any Security at its Maturity; or

                  (3) failure on the part of the Corporation  duly to observe or
         perform  in  any  material  respects  any  other  of the  covenants  or
         agreements on the part of the  Corporation in the Securities or in this
         Indenture for a period of 90 days after the date on which

                                                         - 33 -






         written notice of such failure, requiring the Corporation to remedy the
         same and stating  that such notice is a "Notice of Default"  shall have
         been given by registered or certified  mail to the  Corporation  by the
         Trustee or to the  Corporation  and the  Trustee  by the  Holders of at
         least 25% in aggregate principal amount of the Outstanding  Securities;
         or

                  (4)  the  entry  of  a  decree  or  order  by a  court  having
         jurisdiction  in the premises  adjudging the  Corporation a bankrupt or
         insolvent,   or  approving  as  properly   filed  a  petition   seeking
         reorganization  of the  Corporation  under the  Bankruptcy  Code or any
         other similar  applicable  Federal or State law,  which decree or order
         shall have continued undischarged and unstayed for a period of 60 days;
         or the entry of a decree or order of a court having jurisdiction in the
         premises for the  appointment of a receiver or liquidator or trustee or
         assignee in  bankruptcy  or  insolvency  of the  Corporation  or of its
         property,  or for the winding up or liquidation  of its affairs,  which
         decree or order shall have  continued  undischarged  and unstayed for a
         period of 60 days; or

                  (5)  the   commencement   by  the   Corporation  of  voluntary
         proceedings  to be  adjudicated  a  bankrupt,  or  the  consent  by the
         Corporation to the filing of a bankruptcy proceeding against it, or the
         filing by the  Corporation  of a petition or answer or consent  seeking
         reorganization  under the Bankruptcy  Code or any other similar Federal
         or State law,  or the consent by the  Corporation  to the filing of any
         such petition,  or the consent by the Corporation to the appointment of
         a receiver  or  liquidator  or trustee or  assignee  in  bankruptcy  or
         insolvency of it or of its property,  or the making by the  Corporation
         of an assignment for the benefit of creditors,  or the admission by the
         Corporation  in writing of its inability to pay its debts  generally as
         they become due; or

               (6)  any  other  Event  of  Default   provided  with  respect  to
          Securities.

         SECTION 5.2.  Acceleration of Maturity; Rescission and Annulment.

         If an Event of Default  (other  than an Event of Default  specified  in
Section  5.1(4) or 5.1(5)) with respect to  Securities  at the time  Outstanding
occurs and is continuing, then and in every such case the Trustee or the Holders
of not less than 25% in aggregate principal amount of the Outstanding Securities
may declare the  principal  amount of all the  Securities  to be due and payable
immediately,  by a notice in writing to the  Corporation  (and to the Trustee if
given by Holders),  provided that, if, upon an Event of Default,  the Trustee or
the  Holders  of not  less  than  25% in  principal  amount  of the  Outstanding
Securities fail to declare the principal of all the  Outstanding  Securities (or
specified portion thereof) to be immediately due and payable,  the holders of at
least 25% in  aggregate  Liquidation  Amount (as  defined in the  related  Trust
Agreement) of Capital  Securities  issued by such Issuer Trust then  outstanding
shall  have the right to make such  declaration  by a notice in  writing  to the
Corporation and the Trustee; and upon any such declaration such principal amount
(or specified portion thereof) of and the accrued interest on all the Securities
shall become  immediately due and payable.  If an Event of Default  specified in
Section  5.1(4) or 5.1(5) with  respect to  Securities  at the time  Outstanding
occurs,  the principal  amount of all the Securities and the accrued interest on
all the Securities shall

                                                         - 34 -






automatically,  and without any  declaration  or other action on the part of the
Trustee or any Holder, become immediately due and payable.  Payment of principal
(and premium,  if any) and interest on such Securities shall remain subordinated
to the extent  provided in Article XII  notwithstanding  that such amount  shall
become immediately due and payable as herein provided.

         At any time after such a declaration  of  acceleration  with respect to
Securities  has been made and  before a judgment  or decree  for  payment of the
money due has been  obtained by the  Trustee as  hereinafter  in this  Article V
provided,  the  Holders  of a  majority  in  aggregate  principal  amount of the
Outstanding  Securities,  by written notice to the  Corporation and the Trustee,
may rescind and annul such declaration and its consequences if:

               (1) the  Corporation has paid or deposited with the Trustee a sum
          sufficient to pay:

                    (A) all overdue installments of interest on all Securities,

                    (B)  the  principal  of  (and  premium,   if  any,  on)  any
               Securities   that  have  become  due   otherwise   than  by  such
               declaration of acceleration, and

                    (C) all sums paid or advanced by the Trustee  hereunder  and
               the reasonable compensation, expenses, disbursements and advances
               of the Trustee, its agents and counsel; and

               (2) all Events of Default with respect to Securities,  other than
          the  non-payment  of the principal of  Securities  that has become due
          solely by such acceleration,  have been cured or waived as provided in
          Section 5.13.

         If the Holders of the  Securities  fail to annul such  declaration  and
waive such  default,  the  holders of a Majority  in  Liquidation  Amount of the
Capital  Securities (as defined in the related Trust  Agreement)  issued by such
Issuer Trust shall also have the right to rescind and annul such declaration and
its  consequences by written notice to the Corporation and the Trustee,  subject
to the  satisfaction of the conditions set forth in Clauses (1) and (2) above of
this Section 5.2.

         No such  rescission  shall affect any subsequent  default or impair any
right consequent thereon.

          SECTION 5.3.  Collection of Indebtedness  and Suits for Enforcement by
     Trustee.

         The Corporation covenants that if:

                  (1)  default  is made in the  payment  of any  installment  of
         interest on any Security when such interest becomes due and payable and
         such default continues for a period of 30 days, or


                                                         - 35 -






               (2)  default  is  made in the  payment  of the  principal  of (or
          premium, if any, on) any Security at the Maturity thereof,

the Corporation  will, upon demand of the Trustee,  pay to the Trustee,  for the
benefit of the Holders of such Securities, the whole amount then due and payable
on such  Securities for principal (and premium,  if any),  including any sinking
fund payment or analogous obligations,  and interest,  and, in addition thereto,
all amounts owing to the Trustee under Section 6.7.

         If the  Corporation  fails  to pay such  amounts  forthwith  upon  such
demand,  the Trustee,  in its own name and as trustee of an express  trust,  may
institute  a  judicial  proceeding  for the  collection  of the  sums so due and
unpaid,  and may prosecute such proceeding to judgment or final decree,  and may
enforce  the same  against  the  Corporation  or any  other  obligor  upon  such
Securities  and  collect  the  moneys  adjudged  or decreed to be payable in the
manner  provided  by law out of the  property  of the  Corporation  or any other
obligor upon the Securities, wherever situated.

         If an Event  of  Default  with  respect  to  Securities  occurs  and is
continuing, the Trustee may in its discretion proceed to protect and enforce its
rights and the rights of the Holders of Securities by such appropriate  judicial
proceedings  as the Trustee shall deem most effectual to protect and enforce any
such rights,  whether for the specific  enforcement of any covenant or agreement
in this Indenture or in aid of the exercise of any power granted  herein,  or to
enforce any other proper remedy.

         SECTION 5.4.  Trustee May File Proofs of Claim.

         In  case  of any  receivership,  insolvency,  liquidation,  bankruptcy,
reorganization,   arrangement,   adjustment,   composition   or  other  judicial
proceeding  relative to the Corporation or any other obligor upon the Securities
or the property of the Corporation or of such other obligor or their creditors,

                  (a) the Trustee  (irrespective of whether the principal of the
         Securities  shall then be due and  payable as therein  expressed  or by
         declaration or otherwise and  irrespective of whether the Trustee shall
         have made any  demand on the  Corporation  for the  payment  of overdue
         principal  (or  premium,  if any) or  interest)  shall be entitled  and
         empowered, by intervention in such proceeding or otherwise,

                           (1) to file and prove a claim for the whole amount of
                  principal (and premium,  if any) and interest owing and unpaid
                  in respect of the  Securities and to file such other papers or
                  documents as may be necessary or advisable and to take any and
                  all actions as are authorized under the Trust Indenture Act in
                  order to have the claims of the Holders and any predecessor to
                  the Trustee  under  Section  6.7 allowed in any such  judicial
                  proceedings; and


                                                         - 36 -






                           (2) in particular, the Trustee shall be authorized to
                  collect and receive  any moneys or other  property  payable or
                  deliverable  on any such claims and to distribute  the same in
                  accordance with Section 5.6; and

                  (b) any custodian,  receiver,  assignee, trustee,  liquidator,
         sequestrator   (or  other  similar   official)  in  any  such  judicial
         proceeding is hereby authorized by each Holder to make such payments to
         the Trustee for distribution in accordance with Section 5.6, and in the
         event that the  Trustee  shall  consent to the making of such  payments
         directly to the Holders, to pay to the Trustee any amount due to it and
         any predecessor Trustee under Section 6.7.

         Nothing  herein  contained  shall be deemed to authorize the Trustee to
authorize  or  consent to or accept or adopt on behalf of any Holder any plan of
reorganization,  arrangement, adjustment or composition affecting the Securities
or the rights of any Holder  thereof,  or to  authorize  the  Trustee to vote in
respect of the claim of any Holder in any such  proceeding;  provided,  however,
that the  Trustee  may,  on behalf of the  Holders,  vote for the  election of a
trustee in  bankruptcy  or similar  official and be a member of a creditors'  or
other similar committee.

         SECTION 5.5.  Trustee May Enforce Claim Without Possession of 
Securities.

         All rights of action and claims under this  Indenture or the Securities
may be prosecuted  and enforced by the Trustee  without the possession of any of
the Securities or the production thereof in any proceeding relating thereto, and
any such  proceeding  instituted by the Trustee shall be brought in its own name
as trustee of an express trust,  and any recovery of judgment shall,  subject to
Article XII and after  provision  for the  payment of all the amounts  owing the
Trustee and any  predecessor  Trustee under Section 6.7, its agents and counsel,
be for the ratable  benefit of the Holders of the Securities in respect of which
such judgment has been recovered.

         SECTION 5.6.  Application of Money Collected.

         Any money or property  collected  or to be applied by the Trustee  with
respect  to  Securities  pursuant  to this  Article  V shall be  applied  in the
following  order,  at the date or dates fixed by the Trustee and, in case of the
distribution  of such money or property on account of principal (or premium,  if
any) or interest,  upon  presentation of the Securities and the notation thereon
of the payment if only partially paid and upon surrender thereof if fully paid:

               FIRST:  To the  payment of all  amounts  due the  Trustee and any
          predecessor Trustee under Section 6.7;

               SECOND:  Subject to Article  XII,  to the  payment of the amounts
          then due and unpaid upon Securities of principal (and premium, if any)
          and  interest  in  respect  of which or for the  benefit of which such
          money has been collected, ratably, without preference

                                                         - 37 -






          or priority of any kind,  according  to the amounts due and payable on
          such  Securities  for principal  (and  premium,  if any) and interest,
          respectively; and

               THIRD:  The  balance,  if any, to the Person or Persons  entitled
          thereto.

         SECTION 5.7.  Limitation on Suits.

         Subject  to Section  5.8,  no Holder of any  Securities  shall have any
right to institute any proceeding,  judicial or otherwise,  with respect to this
Indenture or for the appointment of a receiver, assignee, trustee, liquidator or
sequestrator  (or other  similar  official) or for any other  remedy  hereunder,
unless:

               (1) such  Holder  has  previously  given  written  notice  to the
          Trustee  of  a  continuing  Event  of  Default  with  respect  to  the
          Securities;

               (2) the  Holders  of not  less  than 25% in  aggregate  principal
          amount of the Outstanding  Securities  shall have made written request
          to the Trustee to  institute  proceedings  in respect of such Event of
          Default in its own name as Trustee hereunder;

               (3) such Holder or Holders have offered to the Trustee reasonable
          indemnity  against the costs,  expenses and liabilities to be incurred
          in compliance with such request;

               (4) the  Trustee  for 60 days after its  receipt of such  notice,
          request  and  offer of  indemnity  has  failed to  institute  any such
          proceeding; and

               (5) no direction  inconsistent with such written request has been
          given to the Trustee  during  such  60-day  period by the Holders of a
          majority in aggregate principal amount of the Outstanding Securities;

it being  understood and intended that no one or more of such Holders shall have
any right in any manner  whatever  by virtue of, or by  availing  itself of, any
provision of this  Indenture to affect,  disturb or prejudice  the rights of any
other  Holders  of  Securities,  or to obtain or to seek to obtain  priority  or
preference  over any other of such  Holders or to enforce  any right  under this
Indenture,  except in the manner  herein  provided and for the equal and ratable
benefit of all such Holders.

          SECTION  5.8.  Unconditional  Right of Holders  to Receive  Principal,
     Premium and Interest; Direct Action by Holders of Capital Securities.

         Notwithstanding  any other provision in this  Indenture,  the Holder of
any  Security  shall have the right,  which is absolute  and  unconditional,  to
receive  payment of the  principal  of (and  premium,  if any) and  (subject  to
Sections  3.7 and 3.11)  interest  on such  Security  on the  respective  Stated
Maturities  expressed in such  Security (or, in the case of  redemption,  on the
Redemption  Date) and to institute suit for the enforcement of any such payment,
and such right

                                                         - 38 -






shall not be impaired without the consent of such Holder.  Any registered holder
of Capital  Securities shall have the right,  upon the occurrence of an Event of
Default  described in Section  5.1(1) or 5.1(2),  to  institute a suit  directly
against the  Corporation  for enforcement of payment to such holder of principal
of  (premium,  if any) and  (subject to Sections  3.7 and 3.11)  interest on the
Securities having a principal amount equal to the aggregate  Liquidation  Amount
(as defined in the related Trust  Agreement) of such Capital  Securities held by
such holder.

         SECTION 5.9.  Restoration of Rights and Remedies.

         If the Trustee,  any Holder or any holder of Capital  Securities issued
by any Issuer Trust has instituted any proceeding to enforce any right or remedy
under this Indenture and such proceeding has been  discontinued or abandoned for
any reason, or has been determined adversely to the Trustee, such Holder or such
holder of Capital Securities,  then and in every such case the Corporation,  the
Trustee,  such Holders and such holder of Capital  Securities shall,  subject to
any determination in such proceeding,  be restored severally and respectively to
their former positions hereunder,  and thereafter all rights and remedies of the
Trustee,  such Holder and such holder of Capital  Securities  shall  continue as
though no such proceeding had been instituted.

         SECTION 5.10.  Rights and Remedies Cumulative.

         Except as otherwise  provided in the last  paragraph of Section 3.6, no
right or remedy herein  conferred upon or reserved to the Trustee or the Holders
is intended to be  exclusive  of any other right or remedy,  and every right and
remedy shall,  to the extent  permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or  otherwise.  The  assertion or employment of any right or remedy
hereunder,  or  otherwise,   shall  not  prevent  the  concurrent  assertion  or
employment of any other appropriate right or remedy.

         SECTION 5.11.  Delay or Omission Not Waiver.

         No delay or omission of the Trustee,  any Holder of any Security or any
holder of any Capital Security to exercise any right or remedy accruing upon any
Event of Default with respect to the  Securities  shall impair any such right or
remedy or  constitute  a waiver of any such Event of Default or an  acquiescence
therein.

         Every right and remedy given by this Article V or by law to the Trustee
or to the  Holders  and the right and  remedy  given to the  holders  of Capital
Securities  by Section 5.8 may be exercised  from time to time,  and as often as
may be deemed expedient,  by the Trustee,  the Holders or the holders of Capital
Securities, as the case may be.


                                                         - 39 -






         SECTION 5.12.  Control by Holders.

         The Holders of not less than a majority in aggregate  principal  amount
of the Outstanding  Securities  shall have the right to direct the time,  method
and place of conducting any  proceeding for any remedy  available to the Trustee
or exercising any trust or power  conferred on the Trustee,  with respect to the
Securities, provided that:

          (1) such  direction  shall not be in conflict  with any rule of law or
     with this Indenture,

          (2) the Trustee may take any other action deemed proper by the Trustee
     that is not inconsistent with such direction, and

          (3) subject to the  provisions  of Section 6.1, the Trustee shall have
     the right to decline to follow such  direction if a Responsible  Officer or
     Officers of the Trustee shall, in good faith, determine that the proceeding
     so directed would be unjustly prejudicial to the Holders not joining in any
     such direction or would involve the Trustee in personal liability.

         SECTION 5.13.  Waiver of Past Defaults.

         The Holders of not less than a majority in aggregate  principal  amount
of the Outstanding Securities affected thereby and, the holders of a Majority in
Liquidation  Amount of the Capital  Securities  (as defined in the related Trust
Agreement)  issued by such Issuer  Trust may waive any past  default or Event of
Default  hereunder and its consequences with respect to such Securities except a
default:

                  (1) in the payment of the principal of (or premium, if any) or
         interest on any  Security  (unless  such default has been cured and the
         Corporation  has paid to or deposited with the Trustee a sum sufficient
         to pay all matured  installments  of interest and all principal of (and
         premium,   if  any,  on)  all   Securities   due   otherwise   than  by
         acceleration), or

                  (2) in respect of a covenant  or  provision  hereof that under
         Article IX cannot be  modified  or amended  without the consent of each
         Holder of any Outstanding Security affected.

         Any such  waiver  shall be deemed to be on behalf of the Holders of all
the  Securities  and in the case of a waiver by holders  of  Capital  Securities
issued by the Issuer Trust, by the holders of all the Capital  Securities issued
by such Issuer Trust.

         Upon any such waiver,  such default or Event of Default  shall cease to
exist, and any default or Event of Default arising  therefrom shall be deemed to
have been cured, for every

                                                         - 40 -






purpose of this Indenture;  but no such waiver shall extend to any subsequent or
other default or Event of Default or impair any right consequent thereon.

         SECTION 5.14.  Undertaking for Costs.

         All parties to this Indenture  agree,  and each Holder of any Security,
by its acceptance thereof, shall be deemed to have agreed, that any court may in
its discretion  require,  in any suit for the enforcement of any right or remedy
under this Indenture, or in any suit against the Trustee for any action taken or
omitted by it as  Trustee,  the filing by any party  litigant in such suit of an
undertaking  to pay the  costs of such  suit,  and that  such  court  may in its
discretion  assess  reasonable  costs,  including  reasonable  attorneys'  fees,
against  any party  litigant  in such suit,  having due regard to the merits and
good  faith of the  claims or  defenses  made by such  party  litigant;  but the
provisions  of this Section 5.14 shall not apply to any suit  instituted  by the
Trustee, to any suit instituted by any Holder or group of Holders holding in the
aggregate  more  than  10% in  aggregate  principal  amount  of the  Outstanding
Securities,  or to any suit  instituted by any Holder for the enforcement of the
payment of the principal of (or premium,  if any) or interest on any Security on
or after the respective Stated Maturities expressed in such Security.

         SECTION 5.15.  Waiver of Usury, Stay or Extension Laws.

         The  Corporation  covenants  (to the extent that it may lawfully do so)
that it will not at any time insist upon, or plead, or in any manner  whatsoever
claim or take the benefit or  advantage  of, any usury,  stay or  extension  law
wherever  enacted,  now or at any time hereafter in force,  which may affect the
covenants or the  performance of this  Indenture;  and the  Corporation  (to the
extent  that it may  lawfully  do so) hereby  expressly  waives  all  benefit or
advantage  of any such law,  and  covenants  that it will not  hinder,  delay or
impede the execution of any power herein granted to the Trustee, but will suffer
and  permit  the  execution  of every  such power as though no such law had been
enacted.


                                   ARTICLE VI

                                   THE TRUSTEE

         SECTION 6.1.  Certain Duties and Responsibilities.

         (a) Except during the continuance of an Event of Default,

                  (1) the  Trustee  undertakes  to perform  such duties and only
         such duties as are  specifically  set forth in this  Indenture,  and no
         implied  covenants  or  obligations  shall be read into this  Indenture
         against the Trustee; and

                  (2) in the  absence of bad faith on its part,  the Trustee may
         conclusively   rely,  as  to  the  truth  of  the  statements  and  the
         correctness of the opinions expressed therein, upon

                                                         - 41 -






         certificates or opinions furnished to the Trustee and conforming to the
         requirements  of  this   Indenture;   but  in  the  case  of  any  such
         certificates or opinions that by any provisions hereof are specifically
         required to be furnished to the Trustee,  the Trustee  shall be under a
         duty to examine the same to  determine  whether or not they  conform to
         the requirements of this Indenture.

         (b) If an Event of Default has occurred and is continuing,  the Trustee
shall exercise such of the rights and powers vested in it by this Indenture, and
use the same  degree of care and skill in their  exercise,  as a prudent  person
would exercise or use under the  circumstances  in the conduct of his or her own
affairs.

         (c) No  provision of this  Indenture  shall be construed to relieve the
Trustee from liability for its own negligent  action,  its own negligent failure
to act, or its own wilful misconduct except that:

               (1) this Subsection shall not be construed to limit the effect of
          Subsection (a) of this Section 6.1;

               (2) the  Trustee  shall not be liable  for any error of  judgment
          made in good faith by a Responsible Officer, unless it shall be proved
          that the Trustee was negligent in  ascertaining  the pertinent  facts;
          and

               (3) the Trustee  shall not be liable  with  respect to any action
          taken or omitted to be taken by it in good  faith in  accordance  with
          the  direction  of Holders  pursuant to Section  5.12  relating to the
          time,  method and place of conducting  any  proceeding  for any remedy
          available to the Trustee,  or exercising any trust or power  conferred
          upon the Trustee, under this Indenture with respect to the Securities.

         (d) No provision of this Indenture  shall require the Trustee to expend
or risk  its own  funds  or  otherwise  incur  any  financial  liability  in the
performance  of any of its duties  hereunder,  or in the  exercise of any of its
rights or powers,  if there  shall be  reasonable  grounds  for  believing  that
repayment of such funds or adequate  indemnity against such risk or liability is
not reasonably assured to it.

         (e) Whether or not therein  expressly so provided,  every  provision of
this  Indenture  relating  to the  conduct  or  affecting  the  liability  of or
affording  protection to the Trustee shall be subject to the  provisions of this
Section 6.1.

         SECTION 6.2.  Notice of Defaults.

         Within 30 days after actual  knowledge by a Responsible  Officer of the
Trustee  of  the  occurrence  of  any  default  hereunder  with  respect  to the
Securities,  the Trustee shall transmit by mail to all Holders of Securities, as
their names and  addresses  appear in the  Securities  Register,  notice of such
default, unless such default shall have been cured or waived; provided, however,

                                                         - 42 -






that,  except in the case of a default in the  payment of the  principal  of (or
premium, if any) or interest on any Security,  the Trustee shall be protected in
withholding such notice if and so long as the board of directors,  the executive
committee or a trust committee of directors and/or  Responsible  Officers of the
Trustee in good faith  determines  that the withholding of such notice is in the
interests of the Holders of Securities;  and provided further, however, that, in
the case of any default of the character  specified in Section  5.1(3),  no such
notice to Holders of Securities  shall be given until at least 30 days after the
occurrence  thereof.  For the purpose of this Section  6.2,  the term  "default"
means any event that is, or after notice or lapse of time or both would  become,
an Event of Default with respect to Securities.

         SECTION 6.3.  Certain Rights of Trustee.

         Subject to the provisions of Section 6.1:

         (a) the Trustee may rely and shall be protected in acting or refraining
from acting upon any resolution,  certificate,  statement,  instrument, opinion,
report, notice, request, direction, consent, order, bond, debenture, Security or
other paper or document  believed by it to be genuine and to have been signed or
presented by the proper party or parties;

         (b) any request or direction of the Corporation  mentioned herein shall
be sufficiently  evidenced by a Corporation Request or Corporation Order and any
resolution  of the Board of Directors may be  sufficiently  evidenced by a Board
Resolution;

         (c) whenever in the  administration of this Indenture the Trustee shall
deem it  desirable  that a matter  be  proved or  established  prior to  taking,
suffering or omitting any action  hereunder,  the Trustee (unless other evidence
be herein specifically prescribed) may, in the absence of bad faith on its part,
rely upon an Officers' Certificate;

         (d) the Trustee may consult with counsel and the advice of such counsel
or any  Opinion  of  Counsel  shall  be  full  and  complete  authorization  and
protection in respect of any action  taken,  suffered or omitted by it hereunder
in good faith and in reliance thereon;

         (e) the Trustee  shall be under no  obligation  to exercise  any of the
rights or powers  vested in it by this  Indenture at the request or direction of
any of the Holders  pursuant to this  Indenture,  unless such Holders shall have
offered to the  Trustee  reasonable  security  or  indemnity  against the costs,
expenses and  liabilities  that might be incurred by it in  complying  with such
request or direction;

         (f) the Trustee shall not be bound to make any  investigation  into the
facts or matters stated in any resolution,  certificate,  statement, instrument,
opinion,  report, notice, request,  direction,  consent, order, bond, debenture,
Security or other paper or document,  but the Trustee in its discretion may make
such inquiry or investigation into such facts or matters as it may see fit; and


                                                         - 43 -






         (g) the Trustee may  execute any of the trusts or powers  hereunder  or
perform  any  duties  hereunder  either  directly  or by or  through  agents  or
attorneys  and the  Trustee  shall  not be  responsible  for any  misconduct  or
negligence  on the part of any agent or attorney  appointed  by it with due care
hereunder.

         SECTION 6.4.  Not Responsible for Recitals or Issuance of Securities.

         The  recitals  contained  herein  and in  the  Securities,  except  the
Trustee's  certificates of  authentication,  shall be taken as the statements of
the Corporation,  and neither the Trustee nor any  Authenticating  Agent assumes
any responsibility  for their correctness.  The Trustee makes no representations
as to the  validity  or  sufficiency  of this  Indenture  or of the  Securities.
Neither the Trustee nor any  Authenticating  Agent shall be accountable  for the
use or application by the Corporation of the Securities or the proceeds thereof.

         SECTION 6.5.  May Hold Securities.

         The Trustee, any Authenticating Agent, any Paying Agent, any Securities
Registrar or any other agent of the Corporation,  in its individual or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
6.8 and 6.13,  may otherwise deal with the  Corporation  with the same rights it
would  have  if  it  were  not  Trustee,  Authenticating  Agent,  Paying  Agent,
Securities Registrar or such other agent.

         SECTION 6.6.  Money Held in Trust.

         Money held by the  Trustee in trust  hereunder  need not be  segregated
from other  funds  except to the extent  required  by law  (including  the Trust
Indenture  Act).  The Trustee  shall be under no  liability  for interest on any
money received by it hereunder except as otherwise agreed with the Corporation.

         SECTION 6.7.  Compensation and Reimbursement.

         The Corporation agrees:

                  (1) to pay to the  Trustee  from time to time such  reasonable
         compensation for all services  rendered by it hereunder in such amounts
         as the Corporation and the Trustee shall agree from time to time (which
         compensation  shall not be limited by any provision of law in regard to
         the compensation of a trustee of an express trust);

                  (2)  to  reimburse  the  Trustee  upon  its  request  for  all
         reasonable expenses, disbursements and advances incurred or made by the
         Trustee in accordance  with any provision of this Indenture  (including
         the reasonable  compensation and the expenses and  disbursements of its
         agents and counsel),  except any such expense,  disbursement or advance
         as may be attributable to its negligence or bad faith; and


                                                         - 44 -






                  (3) to  indemnify  the  Trustee  for,  and to hold it harmless
         against,  any loss,  liability  or expense  (including  the  reasonable
         compensation  and the  expenses  and  disbursements  of its  agents and
         counsel) incurred without  negligence,  wilful misconduct or bad faith,
         arising out of or in connection  with the acceptance or  administration
         of this trust or the performance of its duties hereunder, including the
         costs and expenses of defending  itself  against any claim or liability
         in connection  with the exercise or performance of any of its powers or
         duties hereunder. This indemnification shall survive the termination of
         this Indenture.

         When the Trustee incurs expenses or renders  services after an Event of
Default  specified  in Section  5.1(4) or 5.1(5)  occurs,  the  expenses and the
compensation   for  the  services  are  intended  to   constitute   expenses  of
administration under the Bankruptcy Code.

         SECTION 6.8.  Disqualification; Conflicting Interests.

         (a) The Trustee for the  Securities  shall be subject to the provisions
of Section 310(b) of the Trust  Indenture Act.  Nothing herein shall prevent the
Trustee  from  filing with the  Commission  the  application  referred to in the
second to last paragraph of said Section 310(b).

         (b) The Trust  Agreement  and the Guarantee  Agreement  with respect to
each Issuer Trust shall be deemed to be specifically described in this Indenture
for the purposes of clause (i) of the first proviso  contained in Section 310(b)
of the Trust Indenture Act.

         SECTION 6.9.  Corporate Trustee Required; Eligibility.

         There shall at all times be a Trustee hereunder which shall be:

                  (a) a corporation  organized and doing business under the laws
         of the United States of America or of any State or Territory thereof or
         the  District  of  Columbia,  authorized  under  such laws to  exercise
         corporate  trust powers and subject to  supervision  or  examination by
         Federal, State, Territorial or District of Columbia authority, or

                  (b) a corporation or other Person organized and doing business
         under  the laws of a foreign  government  that is  permitted  to act as
         Trustee  pursuant  to a rule,  regulation  or order of the  Commission,
         authorized  under such laws to exercise  corporate  trust  powers,  and
         subject to  supervision  or  examination  by  authority of such foreign
         government or a political subdivision thereof substantially  equivalent
         to supervision or examination applicable to United States institutional
         trustees,

in either case having at the time of appointment  securities rated in one of the
three highest rating categories by a nationally  recognized  statistical  rating
organization and a combined capital and surplus of at least $50,000,000. If such
corporation publishes reports of condition at least annually, pursuant to law or
to the requirements of the aforesaid  supervising or examining authority,  then,
for the purposes of this Section 6.9 and to the extent permitted by the Trust

                                                         - 45 -






Indenture  Act, the combined  capital and surplus of such  corporation  shall be
deemed to be its  combined  capital  and surplus as set forth in its most recent
report of condition so  published.  If at any time the Trustee shall cease to be
eligible in accordance  with the provisions of this Section 6.9, it shall resign
immediately  in the  manner and with the effect  hereinafter  specified  in this
Article  VI.  Neither the  Corporation  nor any Person  directly  or  indirectly
controlling,  controlled by or under common control with the  Corporation  shall
serve as Trustee for the Securities.

         SECTION 6.10.  Resignation and Removal; Appointment of Successor.

         (a) No  resignation  or removal of the Trustee and no  appointment of a
successor  Trustee  pursuant to this Article VI shall become effective until the
acceptance of appointment by the successor Trustee under Section 6.11.

         (b) The Trustee may resign at any time with  respect to the  Securities
by giving  written  notice  thereof  to the  Corporation.  If an  instrument  of
acceptance by a successor  Trustee shall not have been  delivered to the Trustee
within 30 days after the giving of such  notice of  resignation,  the  resigning
Trustee may petition any court of competent  jurisdiction for the appointment of
a successor Trustee with respect to the Securities.

         (c)  The  Trustee  may be  removed  at any  time  with  respect  to the
Securities by Act of the Holders of a majority in aggregate  principal amount of
the Outstanding Securities, delivered to the Trustee and to the Corporation.

         (d) If at any time:

         (1) the  Trustee  shall fail to comply with  Section 6.8 after  written
request  therefor by the  Corporation  or by any Holder who has been a bona fide
Holder of a Security for at least six months, or

         (2) the Trustee shall cease to be eligible  under Section 6.9 and shall
fail to resign after written request  therefor by the Corporation or by any such
Holder, or

         (3) the Trustee shall become incapable of acting or shall be adjudged a
bankrupt or insolvent  or a receiver of the Trustee or of its property  shall be
appointed or any public  officer  shall take charge or control of the Trustee or
of its property or affairs for the purpose of  rehabilitation,  conservation  or
liquidation,

then, in any such case, (i) the Corporation, acting pursuant to the authority of
a Board  Resolution,  may remove the Trustee with respect to the Securities,  or
(ii)  subject to Section  5.14,  any Holder who has been a bona fide Holder of a
Security  for at least six months  may,  on behalf of such Holder and all others
similarly situated, petition any court of competent jurisdiction for the removal
of the Trustee with respect to the Securities and the appointment of a successor
Trustee or Trustees.

                                                         - 46 -







         (e) If the Trustee  shall  resign,  be removed or become  incapable  of
acting,  or if a vacancy shall occur in the office of Trustee for any cause with
respect  to the  Securities,  the  Corporation,  by a  Board  Resolution,  shall
promptly appoint a successor Trustee with respect to the Securities.  If, within
one year after such resignation,  removal or incapability,  or the occurrence of
such  vacancy,  a successor  Trustee  with  respect to the  Securities  shall be
appointed by Act of the Holders of a majority in aggregate  principal  amount of
the  Outstanding  Securities  delivered  to the  Corporation  and  the  retiring
Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance
of such appointment, become the successor Trustee with respect to the Securities
and  supersede  the  successor  Trustee  appointed  by  the  Corporation.  If no
successor Trustee with respect to the Securities shall have been so appointed by
the  Corporation  or  the  Holders  and  accepted   appointment  in  the  manner
hereinafter  provided,  any Holder who has been a bona fide Holder of a Security
for at least six months may,  subject to Section  5.14, on behalf of such Holder
and all others similarly situated,  petition any court of competent jurisdiction
for the appointment of a successor Trustee with respect to the Securities.

         (f) The  Corporation  shall give  notice of each  resignation  and each
removal of the Trustee with respect to the Securities and each  appointment of a
successor  Trustee with respect to the  Securities by mailing  written notice of
such event by first-class mail, postage prepaid, to the Holders of Securities as
their names and addresses appear in the Securities  Register.  Each notice shall
include the name of the successor Trustee with respect to the Securities and the
address of its Corporate Trust Office.

         SECTION 6.11.  Acceptance of Appointment by Successor.

         (a) In case of the  appointment  hereunder of a successor  Trustee with
respect to all  Securities,  every such  successor  Trustee so  appointed  shall
execute,  acknowledge and deliver to the Corporation and to the retiring Trustee
an instrument  accepting  such  appointment,  and thereupon the  resignation  or
removal of the  retiring  Trustee  shall  become  effective  and such  successor
Trustee,  without any further act, deed or conveyance,  shall become vested with
all the rights,  powers,  trusts and duties of the retiring Trustee; but, on the
request of the  Corporation  or the successor  Trustee,  such  retiring  Trustee
shall,  upon  payment  of  its  charges,   execute  and  deliver  an  instrument
transferring to such successor Trustee all the rights,  powers and trusts of the
retiring  Trustee and shall duly assign,  transfer and deliver to such successor
Trustee all property and money held by such retiring Trustee hereunder.

         (b) In case of the  appointment  hereunder of a successor  Trustee with
respect to the  Securities,  the  Corporation,  the  retiring  Trustee  and each
successor  Trustee with respect to the  Securities  shall execute and deliver an
indenture  supplemental  hereto wherein each successor Trustee shall accept such
appointment and which (1) shall contain such provisions as shall be necessary or
desirable to transfer and confirm to, and to vest in, each successor Trustee all
the rights,  powers,  trusts and duties of the retiring  Trustee with respect to
the Securities,  (2) if the retiring Trustee is not retiring with respect to all
Securities,  shall  contain  such  provisions  as shall be deemed  necessary  or
desirable  to  confirm  that all the  rights,  powers,  trusts and duties of the
retiring Trustee with respect to the Securities,  and (3) shall add to or change
any of the

                                                         - 47 -






provisions of this  Indenture as shall be necessary to provide for or facilitate
the  administration  of the trusts hereunder by more than one Trustee,  it being
understood  that  nothing  herein  or  in  such  supplemental   indenture  shall
constitute  such  Trustees  co-trustees  of the same  trust  and that  each such
Trustee shall be trustee of a trust or trusts hereunder  separate and apart from
any trust or trusts hereunder  administered by any other such Trustee;  and upon
the execution and delivery of such  supplemental  indenture the  resignation  or
removal of the retiring  Trustee shall become  effective to the extent  provided
therein  and each such  successor  Trustee,  without any  further  act,  deed or
conveyance,  shall become vested with all the rights,  powers, trusts and duties
of the retiring  Trustee with respect to the Securities;  but, on request of the
Corporation or any successor  Trustee,  such retiring Trustee shall duly assign,
transfer  and deliver to such  successor  Trustee all property and money held by
such retiring Trustee hereunder with respect to the Securities.

         (c) Upon request of any such successor  Trustee,  the Corporation shall
execute  any and all  instruments  for more fully and  certainly  vesting in and
confirming to such successor  Trustee all rights,  powers and trusts referred to
in paragraph (a) or (b) of this Section 6.11, as the case may be.

         (d) No successor  Trustee  shall accept its  appointment  unless at the
time of such acceptance  such successor  Trustee shall be qualified and eligible
under this Article VI.

     SECTION 6.12. Merger, Conversion, Consolidation or Succession to Business.

         Any  corporation  into which the Trustee may be merged or  converted or
with which it may be consolidated, or any corporation resulting from any merger,
conversion  or  consolidation  to which  the  Trustee  shall be a party,  or any
corporation  succeeding  to all or  substantially  all  of the  corporate  trust
business of the Trustee, shall be the successor Trustee hereunder, provided such
corporation  shall be otherwise  qualified  and eligible  under this Article VI,
without the  execution  or filing of any paper or any further act on the part of
any of the parties hereto. If any Securities shall have been authenticated,  but
not  delivered,  by the  Trustee  then  in  office,  any  successor  by  merger,
conversion  or  consolidation  to such  authenticating  Trustee  may adopt  such
authentication  and  deliver  the  Securities  so  authenticated,   and  if  any
Securities shall not have been  authenticated,  any successor to the Trustee may
authenticate such Securities either in the name of any predecessor Trustee or in
the  name of  such  successor  Trustee,  and in all  cases  the  certificate  of
authentication  shall have the full force which it is  provided  anywhere in the
Securities or in this Indenture that the certificate of the Trustee shall have.

         SECTION 6.13.  Preferential Collection of Claims Against Corporation.

         If  and  when  the  Trustee  shall  be or  become  a  creditor  of  the
Corporation  (or any other  obligor upon the  Securities),  the Trustee shall be
subject to the provisions of the Trust Indenture Act regarding the collection of
claims against the Corporation (or any such other obligor).


                                                         - 48 -






         SECTION 6.14.  Appointment of Authenticating Agent.

         The Trustee may appoint an Authenticating  Agent or Agents with respect
to the Securities,  which shall be authorized to act on behalf of the Trustee to
authenticate  the  Securities  issued  upon  original  issue and upon  exchange,
registration  of transfer or partial  redemption  thereof or pursuant to Section
3.5, and Securities so  authenticated  shall be entitled to the benefits of this
Indenture and shall be valid and obligatory for all purposes as if authenticated
by the Trustee  hereunder.  Wherever  reference is made in this Indenture to the
authentication  and delivery of  Securities  by the Trustee or to the  Trustee's
certificate  of  authentication,  such  reference  shall be  deemed  to  include
authentication and delivery on behalf of the Trustee by an Authenticating  Agent
or the Authenticating  Agent's  certificate of authentication set forth for this
Section 6.14. Each  Authenticating  Agent shall be acceptable to the Corporation
and shall at all times be a corporation  organized and doing  business under the
laws of the United States of America or of any State or Territory thereof or the
District of Columbia, authorized under such laws to act as Authenticating Agent,
having a combined  capital and surplus of not less than  $50,000,000 and subject
to  supervision or  examination  by Federal,  State,  Territorial or District of
Columbia authority.  If such Authenticating Agent publishes reports of condition
at least  annually,  pursuant  to law or to the  requirements  of the  aforesaid
supervising or examining  authority,  then for the purposes of this Section 6.14
and to the extent permitted by the Trust Indenture Act, the combined capital and
surplus of such Authenticating  Agent shall be deemed to be its combined capital
and surplus as set forth in its most recent report of condition so published. If
at any time an  Authenticating  Agent shall  cease to be eligible in  accordance
with the provisions of this Section 6.14, such Authenticating Agent shall resign
immediately in the manner and with the effect specified in this Section 6.14.

         Any  corporation  into which an  Authenticating  Agent may be merged or
converted or with which it may be  consolidated,  or any  corporation  resulting
from any merger,  conversion or consolidation to which such Authenticating Agent
shall be a party, or any corporation  succeeding to all or substantially  all of
the corporate trust business of an Authenticating  Agent, shall be the successor
Authenticating  Agent hereunder,  provided such  corporation  shall be otherwise
qualified and eligible under this Section 6.14,  without the execution or filing
of any paper or any further act on the part of the Trustee or the Authenticating
Agent.

         An Authenticating Agent may resign at any time by giving written notice
thereof to the  Trustee  and to the  Corporation.  The  Trustee  may at any time
terminate the agency of an Authenticating Agent by giving written notice thereof
to such  Authenticating  Agent and to the  Corporation.  Upon  receiving  such a
notice of resignation  or upon such a  termination,  or in case at any time such
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions  of  this  Section   6.14,   the  Trustee  may  appoint  a  successor
Authenticating  Agent,  which shall be acceptable to the  Corporation  and shall
give  notice of such  appointment  in the manner  provided in Section 1.6 to all
Holders of  Securities  with  respect to which  such  Authenticating  Agent will
serve.  Any successor  Authenticating  Agent upon  acceptance of its appointment
hereunder  shall  become  vested with all the  rights,  powers and duties of its
predecessor

                                                         - 49 -






hereunder,  with like effect as if originally named as an Authenticating  Agent.
No successor  Authenticating  Agent shall be appointed unless eligible under the
provision of this Section 6.14.

         The  Trustee  agrees to pay to each  Authenticating  Agent from time to
time reasonable  compensation  for its services under this Section 6.14, and the
Trustee shall be entitled to be  reimbursed  for such  payments,  subject to the
provisions of Section 6.7.

         If an appointment is made pursuant to this Section 6.14, the Securities
may  have  endorsed  thereon,  in  addition  to  the  Trustee's  certificate  of
authentication,  an alternative  certificate of  authentication in the following
form:

         This is one of the  Securities  designated  therein  referred to in the
within mentioned Indenture.


Dated:  ___________________                -------------------
                                            as Trustee


                                             By: ------------------
                                             As Authenticating Agent


                                             By:-------------------
                                             Authorized Officer


                                   ARTICLE VII

              HOLDER'S LISTS AND REPORTS BY TRUSTEE AND CORPORATION

    SECTION 7.1.  Corporation to Furnish Trustee Names and Addresses of Holders.

         The Corporation will furnish or cause to be furnished to the Trustee:

                  (a)  semi-annually,  on or before  January 1 or July 1 of each
         year, a list, in such form as the Trustee may  reasonably  require,  of
         the names and  addresses  of the  Holders as of a date not more than 15
         days prior to the delivery thereof, and

                  (b) at such other times as the Trustee may request in writing,
         within  30 days  after  the  receipt  by the  Corporation  of any  such
         request,  a list of similar form and content as of a date not more than
         15 days prior to the time such list is furnished,


                                                         - 50 -






in each case to the extent such  information  is in the possession or control of
the  Corporation  and has not  otherwise  been  received  by the  Trustee in its
capacity as Securities Registrar.

         SECTION 7.2.  Preservation of Information, Communications to Holders.

         (a) The Trustee shall  preserve,  in as current a form as is reasonably
practicable,  the names and  addresses  of Holders  contained in the most recent
list  furnished  to the  Trustee as  provided  in Section  7.1 and the names and
addresses  of Holders  received  by the Trustee in its  capacity  as  Securities
Registrar.  The  Trustee may  destroy  any list  furnished  to it as provided in
Section 7.1 upon receipt of a new list so furnished.

         (b) The rights of  Holders  to  communicate  with  other  Holders  with
respect to their rights under this  Indenture or under the  Securities,  and the
corresponding rights and privileges of the Trustee,  shall be as provided in the
Trust Indenture Act.

         (c) Every Holder of Securities,  by its acceptance thereof, agrees with
the Corporation and the Trustee that neither the Corporation nor the Trustee nor
any  agent  of  either  of them  shall  be held  accountable  by  reason  of the
disclosure  of  information  as to the names and  addresses  of the Holders made
pursuant to the Trust Indenture Act.

         SECTION 7.3.  Reports by Trustee.

         (a) The Trustee shall  transmit to Holders such reports  concerning the
Trustee and its actions under this Indenture as may be required  pursuant to the
Trust Indenture Act, at the times and in the manner provided pursuant thereto.

         (b) Reports so required to be  transmitted  at stated  intervals of not
more than 12 months shall be  transmitted no later than July 15 in each calendar
year,  commencing  with the first July 15 after the first issuance of Securities
under this Indenture.

         (c) If this  Indenture  shall  have  been  qualified  under  the  Trust
Indenture  Act,  a copy  of  each  such  report  shall,  at  the  time  of  such
transmission to Holders,  be filed by the Trustee with each securities  exchange
upon  which  any  Securities  are  listed  and  also  with the  Commission.  The
Corporation  will  notify  the  Trustee  when any  Securities  are listed on any
securities exchange.

         SECTION 7.4.  Reports by Corporation.

         The  Corporation  shall file with the Trustee and with the  Commission,
and transmit to the Holders, such information,  documents and other reports, and
such summaries  thereof,  as may be required pursuant to the Trust Indenture Act
at the times and in the manner  provided in the Trust  Indenture  Act;  provided
that any such  information,  documents or reports  required to be filed with the
Commission  pursuant to Section 13 or Section 15(d) of the Exchange Act shall be
filed with the  Trustee  within 15 days after the same is  required  to be filed
with the Commission.  At any time when the Corporation is not subject to Section
13 or 15(d) of the Exchange Act,

                                                         - 51 -






upon the request of a Holder or beneficial owner of a Security,  the Corporation
shall  continue to file with the  Commission and provide the Trustee and Holders
with the annual reports and the  information,  documents and other reports which
are specified in Sections 13 and 15(d) of the Exchange Act. The Corporation also
shall comply with the other  provisions of Trust  Indenture Act Section  314(a),
provided,  however,  that the  Corporation  shall be required,  pursuant to this
Section  7.4,  to  provide  any  document,  report or other  information  to the
Commission  only if this  Indenture  shall have been  qualified  under the Trust
Indenture Act.


                                  ARTICLE VIII

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

         SECTION 8.1.  Corporation May Consolidate, Etc., Only on Certain Terms.

         The  Corporation  shall not  consolidate  with or merge  into any other
Person or convey,  transfer or lease its properties and assets  substantially as
an entirety to any Person,  and no Person shall  consolidate  with or merge into
the  Corporation  or  convey,  transfer  or  lease  its  properties  and  assets
substantially as an entirety to the Corporation, unless:

                  (1) if the Corporation  shall  consolidate  with or merge into
         another  Person or convey,  transfer or lease its properties and assets
         substantially as an entirety to any Person,  the corporation  formed by
         such  consolidation  or into  which  the  Corporation  is merged or the
         Person that  acquires by conveyance  or transfer,  or that leases,  the
         properties and assets of the Corporation  substantially  as an entirety
         shall be a  corporation,  partnership  or trust  organized and existing
         under the laws of the United  States of America or any State thereof or
         the District of Columbia and shall  expressly  assume,  by an indenture
         supplemental  hereto,  executed and  delivered to the Trustee,  in form
         satisfactory  to the  Trustee,  the due  and  punctual  payment  of the
         principal of (and premium,  if any) and interest on all the  Securities
         and the  performance of every covenant of this Indenture on the part of
         the Corporation to be performed or observed;

                  (2) immediately  after giving effect to such  transaction,  no
         Event of Default,  and no event that, after notice or lapse of time, or
         both, would constitute an Event of Default,  shall have occurred and be
         continuing; and

                  (3) the  Corporation has delivered to the Trustee an Officers'
         Certificate  and  an  Opinion  of  Counsel,   each  stating  that  such
         consolidation,  merger,  conveyance,  transfer  or  lease  and any such
         supplemental  indenture  comply  with  this  Article  VIII and that all
         conditions  precedent  herein provided for relating to such transaction
         have been complied with;  and the Trustee,  subject to Section 6.1, may
         rely  upon  such  Officers'  Certificate  and  Opinion  of  Counsel  as
         conclusive  evidence that such  transaction  complies with this Section
         8.1.


                                                         - 52 -






         SECTION 8.2.  Successor Corporation Substituted.

         Upon any  consolidation  or merger by the Corporation  with or into any
other Person,  or any  conveyance,  transfer or lease by the  Corporation of its
properties and assets  substantially  as an entirety to any Person in accordance
with Section 8.1, the successor corporation formed by such consolidation or into
which the Corporation is merged or to which such  conveyance,  transfer or lease
is made shall succeed to, and be  substituted  for, and may exercise every right
and power of, the  Corporation  under this  Indenture with the same effect as if
such successor Person had been named as the Corporation herein; and in the event
of any such conveyance,  transfer or lease, the Corporation  shall be discharged
from all obligations and covenants under this Indenture and the Securities.

         Such successor Person may cause to be executed, and may issue either in
its own name or in the  name of the  Corporation,  any or all of the  Securities
issuable   hereunder  that  theretofore  shall  not  have  been  signed  by  the
Corporation and delivered to the Trustee;  and, upon the order of such successor
Person instead of the Corporation  and subject to all the terms,  conditions and
limitations in this Indenture  prescribed,  the Trustee shall  authenticate  and
shall  deliver  any  Securities  that  previously  shall  have been  signed  and
delivered by the officers of the  Corporation to the Trustee for  authentication
pursuant  to such  provisions  and any  Securities  that such  successor  Person
thereafter shall cause to be executed and delivered to the Trustee on its behalf
for the purpose pursuant to such provisions.  All the Securities so issued shall
in all respects have the same legal rank and benefit under this Indenture as the
Securities theretofore or thereafter issued in accordance with the terms of this
Indenture.

         In case of any such  consolidation,  merger,  conveyance,  transfer  or
lease,  such  changes  in  phraseology  and form  may be made in the  Securities
thereafter to be issued as may be appropriate.


                                   ARTICLE IX

                             SUPPLEMENTAL INDENTURES

         SECTION 9.1.  Supplemental Indentures Without Consent of Holders.

         Without the consent of any Holders, the Corporation, when authorized by
a Board  Resolution,  and the  Trustee,  at any time and from time to time,  may
enter into one or more indentures  supplemental  hereto, in form satisfactory to
the Trustee, for any of the following purposes:

                  (1) to  evidence  the  succession  of  another  Person  to the
         Corporation,  and the assumption by any such successor of the covenants
         of the Corporation contained herein and in the Securities contained; or


                                                         - 53 -






                  (2) to  convey,  transfer,  assign,  mortgage  or  pledge  any
         property  to or with the  Trustee  or to  surrender  any right or power
         herein conferred upon the Corporation; or

                  (3) to  add to the  covenants  of the  Corporation  for  the
         benefit of the Holders of Securities; or

                  (4) to add any additional Events of Default for the benefit of
         the Holders of Securities; or

                  (5) to  change  or  eliminate  any of the  provisions  of this
         Indenture,  provided  that any such  change  or  elimination  shall (a)
         become  effective  only when there is no Security  Outstanding  created
         prior to the execution of such supplemental  indenture that is entitled
         to the benefit of such  provision  or (b) not apply to any  Outstanding
         Securities; or

                  (6) to cure  any  ambiguity,  to  correct  or  supplement  any
         provision  herein that may be defective or inconsistent  with any other
         provision  herein,  or to make any other  provisions  with  respect  to
         matters or questions  arising under this Indenture,  provided that such
         action  pursuant  to this  clause  (6) shall not  adversely  affect the
         interest of the Holders of Securities in any material respect or for so
         long  Capital  Securities  issued  by the  Issuer  Trust  shall  remain
         outstanding, the holders of such Capital Securities; or

                  (7) to evidence and provide for the  acceptance of appointment
         hereunder by a successor  Trustee with respect to the Securities and to
         add to or change any of the  provisions  of this  Indenture as shall be
         necessary to provide for or facilitate the administration of the trusts
         hereunder by more than one  Trustee,  pursuant to the  requirements  of
         Section 6.11(b); or

                  (8) to comply with the requirements of the Commission in order
         to effect or maintain the  qualification  of this  Indenture  under the
         Trust Indenture Act.

         SECTION 9.2.  Supplemental Indentures with Consent of Holders.

         With  the  consent  of the  Holders  of not  less  than a  majority  in
aggregate principal amount of the Outstanding Securities, by Act of said Holders
delivered to the Corporation and the Trustee,  the Corporation,  when authorized
by a Board Resolution, and the Trustee may enter into an indenture or indentures
supplemental  hereto for the purpose of adding any  provisions to or changing in
any  manner  or  eliminating  any of the  provisions  of  this  Indenture  or of
modifying  in any  manner the rights of the  Holders  of  Securities  under this
Indenture; provided, however, that no such supplemental indenture shall, without
the consent of the Holder of each Outstanding Security affected thereby,

                  (1) change the Stated  Maturity  of the  principal  of, or any
         installment  of  interest  on, any  Security,  or reduce the  principal
         amount thereof or the rate of interest  thereon or any premium  payable
         upon the redemption thereof, or change the place of payment

                                                         - 54 -






         where,  or the coin or  currency  in which,  any  Security  or interest
         thereon  is  payable,  or impair  the right to  institute  suit for the
         enforcement of any such payment on or after the Stated Maturity thereof
         (or, in the case of redemption, on or after the Redemption Date), or

                  (2) reduce the percentage in aggregate principal amount of the
         Outstanding  Securities,  the consent of whose  Holders is required for
         any such  supplemental  indenture,  or the consent of whose  Holders is
         required for any waiver (of compliance with certain  provisions of this
         Indenture  or  certain  defaults  hereunder  and  their   consequences)
         provided for in this Indenture, or

                  (3) modify any of the provisions of this Section 9.2,  Section
         5.13 or Section  10.5,  except to increase  any such  percentage  or to
         provide that  certain  other  provisions  of this  Indenture  cannot be
         modified or waived  without the consent of the Holder of each  Security
         affected thereby;

provided  further,   however,   that,  so  long  as  Capital  Securities  remain
outstanding,  (i) no such  amendment  shall be made that  adversely  affects the
holders of such Capital  Securities in any material respect,  and no termination
of this  Indenture  shall  occur,  and no  waiver  of any  Event of  Default  or
compliance  with any covenant under this Indenture  shall be effective,  without
the prior consent of the holders of at least a Majority in Liquidation Amount of
such Capital  Securities (as defined in the related Trust Agreement)  unless and
until the principal of (and premium,  if any, on) the Securities and all accrued
and (subject to Section  3.11) unpaid  interest  thereon have been paid in full,
and (ii) no amendment  shall be made to Section 5.8 of this Indenture that would
impair the rights of the  holders  of  Capital  Securities  issued by the Issuer
Trust  provided  therein  without the prior  consent of the holders of each such
Capital  Security  then  outstanding  unless  and  until the  principal  of (and
premium,  if any,  on) the  Securities  and all accrued and  (subject to Section
3.11) unpaid interest thereon have been paid in full.

         A  supplemental  indenture  that changes or eliminates  any covenant or
other  provision of this Indenture  that has expressly been included  solely for
the benefit of the Securities or any Capital Securities of the Issuer Trust that
holds the  Securities,  or that modifies the rights of the Holders of Securities
or holders of such Capital  Securities  with  respect to such  covenant or other
provision,  shall be deemed not to affect the rights under this Indenture of the
Holders of Securities or holders of Capital Securities.

         It shall not be necessary for any Act of Holders under this Section 9.2
to approve the particular form of any proposed  supplemental  indenture,  but it
shall be sufficient if such Act shall approve the substance thereof.


                                                         - 55 -






         SECTION 9.3.  Execution of Supplemental Indentures.

         In  executing  or  accepting  the  additional  trusts  created  by  any
supplemental indenture permitted by this Article IX or the modifications thereby
of the trusts  created by this  Indenture,  the  Trustee  shall be  entitled  to
receive,  and (subject to Section 6.1) shall be fully protected in relying upon,
an Officers' Certificate and an Opinion of Counsel stating that the execution of
such  supplemental  indenture is authorized or permitted by this Indenture,  and
that all conditions  precedent  herein provided for relating to such action have
been complied  with.  The Trustee may, but shall not be obligated to, enter into
any such supplemental indenture that affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

         SECTION 9.4.  Effect of Supplemental Indentures.

         Upon the execution of any supplemental indenture under this Article IX,
this Indenture shall be modified in accordance therewith,  and such supplemental
indenture shall form a part of this Indenture for all purposes; and every Holder
of Securities  theretofore or thereafter  authenticated and delivered  hereunder
shall be bound thereby.

         SECTION 9.5.  Conformity with Trust Indenture Act.

         Every  supplemental  indenture  executed pursuant to this Article shall
conform to the requirements of the Trust Indenture Act as then in effect.

         SECTION 9.6.  Reference in Securities to Supplemental Indentures.

         Securities  authenticated  and  delivered  after the  execution  of any
supplemental indenture pursuant to this Article IX may, and shall if required by
the  Corporation,  bear a notation in form approved by the Corporation as to any
matter provided for in such supplemental  indenture. If the Corporation shall so
determine,  new  Securities  so modified  as to  conform,  in the opinion of the
Corporation,  to any such supplemental indenture may be prepared and executed by
the Corporation and  authenticated  and delivered by the Trustee in exchange for
Outstanding Securities.


                                    ARTICLE X

                                    COVENANTS

         SECTION 10.1.  Payment of Principal, Premium and Interest.

         The Corporation  covenants and agrees for the benefit of the Securities
that it will duly and punctually pay the principal of (and premium,  if any) and
interest on the Securities in accordance  with the terms of such  Securities and
this Indenture.


                                                         - 56 -






         SECTION 10.2.  Maintenance of Office or Agency.

         The  Corporation  will  maintain  in  each  Place  of  Payment  for the
Securities an office or agency where  Securities may be presented or surrendered
for payment, where Securities may be surrendered for registration of transfer or
exchange and where notices and demands to or upon the  Corporation in respect of
the  Securities  and this  Indenture may be served.  The  Corporation  initially
appoints the Trustee,  acting through its Corporate  Trust Office,  as its agent
for said  purposes.  The  Corporation  will give  prompt  written  notice to the
Trustee of any change in the  location of any such  office or agency.  If at any
time the Corporation  shall fail to maintain such office or agency or shall fail
to furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the  Corporate  Trust Office of the
Trustee, and the Corporation hereby appoints the Trustee as its agent to receive
all such presentations, surrenders, notices and demands.

         The  Corporation may also from time to time designate one or more other
offices or agencies where the Securities may be presented or surrendered for any
or all of such  purposes,  and may from time to time rescind such  designations;
provided,  however,  that no such  designation or rescission shall in any manner
relieve the  Corporation  of its  obligation  to maintain an office or agency in
each Place of Payment for  Securities for such purposes.  The  Corporation  will
give prompt written notice to the Trustee of any such designation and any change
in the location of any such office or agency.

         SECTION 10.3.  Money for Security Payments to be Held in Trust.

         If the  Corporation  shall at any time act as its own Paying Agent with
respect to the Securities,  it will, on or before each due date of the principal
of (or premium, if any) or interest on any of the Securities, segregate and hold
in trust for the benefit of the Persons entitled thereto a sum sufficient to pay
the principal  (or premium,  if any) or interest so becoming due until such sums
shall be paid to such Persons or otherwise  disposed of as herein provided,  and
will promptly notify the Trustee of its failure so to act.

         Whenever the Corporation shall have one or more Paying Agents, it will,
prior to 10:00 a.m.,  New York City time,  on each due date of the  principal of
(or premium, if any) or interest on any Securities,  deposit with a Paying Agent
a sum sufficient to pay the amount so becoming due, such sum to be held in trust
for the benefit of the Persons entitled to such amount,  and (unless such Paying
Agent is the Trustee) the  Corporation  will promptly  notify the Trustee of its
failure so to act.

         The Corporation  will cause each Paying Agent other than the Trustee to
execute  and  deliver to the Trustee an  instrument  in which such Paying  Agent
shall agree with the Trustee,  subject to the  provisions  of this Section 10.3,
that such Paying Agent will:

                  (1) hold all sums held by it for the payment of the  principal
         of (and  premium,  if any) and interest on the  Securities in trust for
         the benefit of the Persons entitled thereto

                                                         - 57 -






         until such sums shall be paid to such Persons or otherwise disposed of
         as herein provided;

                  (2) give the Trustee notice of any default by the  Corporation
         (or any  other  obligor  upon  such  Securities)  in the  making of any
         payment of principal (or premium, if any) or interest in respect of any
         Security;

                  (3) at any time during the  continuance  of any  default  with
         respect to the  Securities,  upon the written  request of the  Trustee,
         forthwith  pay to the  Trustee all sums so held in trust by such Paying
         Agent; and

                  (4) comply with the  provisions  of the Trust  Indenture Act
         applicable to it as a Paying Agent.

         The  Corporation  may at any time,  for the  purpose of  obtaining  the
satisfaction  and discharge of this Indenture or for any other purpose,  pay, or
by  Corporation  Order  direct any Paying  Agent to pay, to the Trustee all sums
held in trust by the  Corporation or such Paying Agent,  such sums to be held by
the Trustee  upon the same trusts as those upon which such sums were held by the
Corporation or such Paying Agent;  and, upon such payment by any Paying Agent to
the Trustee, such Paying Agent shall be released from all further liability with
respect to such money.

         Any money  deposited with the Trustee or any Paying Agent, or then held
by the Corporation in trust for the payment of the principal of (or premium,  if
any) or interest on any Security  and  remaining  unclaimed  for two years after
such principal (or premium, if any) or interest has become due and payable shall
(unless  otherwise  required by  mandatory  provision of  applicable  escheat or
abandoned  or  unclaimed  property  law) be paid on  Corporation  Request to the
Corporation,  or (if  then  held by the  Corporation)  shall  (unless  otherwise
required by mandatory  provision of applicable escheat or abandoned or unclaimed
property  law) be  discharged  from such trust;  and the Holder of such Security
shall thereafter, as an unsecured general creditor, look only to the Corporation
for payment thereof,  and all liability of the Trustee or such Paying Agent with
respect to such trust money,  and all  liability of the  Corporation  as trustee
thereof,  shall thereupon  cease;  provided,  however,  that the Trustee or such
Paying  Agent,  before  being  required to make any such  repayment,  may at the
expense of the Corporation cause to be published once, in a newspaper  published
in the English  language,  customarily  published  on each  Business  Day and of
general  circulation in the Borough of Manhattan,  The City of New York,  notice
that such money remains  unclaimed  and that,  after a date  specified  therein,
which  shall  not be less than 30 days  from the date of such  publication,  any
unclaimed   balance  of  such  money  then  remaining  will  be  repaid  to  the
Corporation.


                                                         - 58 -






         SECTION 10.4.  Statement as to Compliance.

         The Corporation shall deliver to the Trustee, within 120 days after the
end of each fiscal year of the  Corporation  ending  after the date  hereof,  an
Officers'  Certificate  covering the preceding calendar year, stating whether or
not to the best knowledge of the signers  thereof the  Corporation is in default
in the  performance,  observance or fulfillment of or compliance with any of the
terms,  provisions,  covenants  and  conditions  of this  Indenture,  and if the
Corporation shall be in default, specifying all such defaults and the nature and
status thereof of which they may have knowledge. For the purpose of this Section
10.4,  compliance  shall be  determined  without  regard to any grace  period or
requirement of notice provided pursuant to the terms of this Indenture.

         SECTION 10.5.  Waiver of Certain Covenants.

         Subject to the rights of holders  of Capital  Securities  specified  in
Section  9.2, if any, the  Corporation  may omit in any  particular  instance to
comply with any covenant or  condition  provided  pursuant to Section  9.1(3) or
9.1(4)  with  respect  to the  Securities,  if before or after the time for such
compliance the Holders of at least a majority in aggregate  principal  amount of
the  Outstanding  Securities  shall,  by Act of such Holders,  either waive such
compliance in such instance or generally waive  compliance with such covenant or
condition,  but no such  waiver  shall  extend to or  affect  such  covenant  or
condition except to the extent so expressly waived, and, until such waiver shall
become  effective,  the  obligations  of the  Corporation in respect of any such
covenant or condition shall remain in full force and effect.

         SECTION 10.6.  Additional Sums.

          So long as no Event of Default  has  occurred  and is  continuing  and
except as  otherwise  specified  or as  contemplated  by Section 2.1, if (i) the
Issuer Trust is the Holder of all of the Outstanding Securities,  and (ii) a Tax
Event has  occurred  and is  continuing  in respect of such  Issuer  Trust,  the
Corporation shall pay to such Issuer Trust (or its permitted successor under the
related  Trust  Agreement)  for so long as such Issuer  Trust (or its  permitted
successor) is the registered holder of the Outstanding Securities, together with
any payment of principal of (or premium, if any) or interest on such Securities,
such  additional  sums  as  may  be  necessary  in  order  that  the  amount  of
Distributions  then  payable by such  Issuer  Trust in  respect  of the  related
Capital  Securities and Common  Securities in accordance  with the terms thereof
shall not be reduced as a result of any  Additional  Taxes arising from such Tax
Event (the  "Additional  Sums").  Whenever in this  Indenture or the  Securities
there is a reference  in any context to the payment of principal of (or premium,
if any) or interest on the  Securities,  such mention shall be deemed to include
mention of the payments of the Additional Sums provided for in this paragraph to
the extent that, in such context,  Additional Sums are, were or would be payable
in respect thereof pursuant to the provisions of this paragraph, and any express
mention of the  payment of  Additional  Sums (if  applicable)  in any  provision
hereof shall not be construed as excluding  Additional Sums in those  provisions
hereof  where such  express  mention is not made;  provided,  however,  that the
deferral of the payment of interest pursuant to Section 3.11 or the

                                                         - 59 -






terms of the Securities  shall not defer the payment of any Additional Sums that
may be due and payable.

         SECTION 10.7.  Additional Covenants.

         The  Corporation  covenants  and agrees with each Holder of  Securities
that it shall not, and it shall not permit any Subsidiary of the Corporation to,
(x)  declare  or pay any  dividends  or  distributions  on, or redeem  purchase,
acquire  or make a  liquidation  payment  with  respect  to,  any  shares of the
Corporation's capital stock, or (y) make any payment of principal of or interest
or premium, if any, on or repay, repurchase or redeem any debt securities of the
Corporation  that rank pari passu in all respects  with or junior in interest to
the  Securities or make any guarantee  payments with respect to any guarantee by
the  Corporation of the debt  securities of any Subsidiary of the Corporation if
such  guarantee  ranks pari passu with or junior in interest  to the  Securities
(other than (a) dividends or  distributions  in common stock of the Corporation,
(b) any  declaration of a dividend in connection  with the  implementation  of a
stockholders'  rights plan,  or the issuance of stock under any such plan in the
future, or the redemption or repurchase of any such rights pursuant thereto, (c)
payments under the Guarantee Agreement and (d) purchases of common stock related
to the issuance of common stock or rights under any of the  Corporation's or any
Subsidiary of the Corporation's  benefit plans for their directors,  officers or
employees  if at such time (i) there shall have  occurred any event of which the
Corporation has actual knowledge that (A) with the giving of notice or the lapse
of time,  or both,  would  constitute  an Event of Default and (B) in respect of
which the Corporation  shall not have taken  reasonable  steps to cure, (ii) the
Corporation  shall be in default with respect to its payment of any  obligations
under the Guarantee  Agreement relating to the Capital Securities issued by such
Issuer Trust, or (iii) the Corporation  shall have given notice of its selection
of an Extension  Period with respect to the  Securities  as provided  herein and
shall not have rescinded such notice, or such Extension Period, or any extension
thereof, shall be continuing.

         The Corporation also covenants with each Holder of Securities issued to
the  Issuer  Trust  (i) to hold,  directly  or  indirectly,  100% of the  Common
Securities  of such Issuer Trust,  provided that any permitted  successor of the
Corporation hereunder may succeed to the Corporation's  ownership of such Common
Securities,  (ii)  as  holder  of such  Common  Securities,  not to  voluntarily
terminate,  wind-up or liquidate such Issuer Trust, other than (a) in connection
with a  distribution  of the  Securities  to the holders of the related  Capital
Securities  in  liquidation  of such Issuer  Trust,  or (b) in  connection  with
certain mergers,  consolidations or amalgamations permitted by the related Trust
Agreement,  and (iii) to use its reasonable  efforts,  consistent with the terms
and provisions of such Trust  Agreement,  to cause such Issuer Trust to continue
to be classified  as a grantor trust and not to be taxable as a corporation  for
United States federal income tax purposes.



                                                         - 60 -






                                   ARTICLE XI

                            REDEMPTION OF SECURITIES

         SECTION 11.1.  Applicability of This Article.

         Redemption  of  Securities  as  permitted  or  required  by any form of
Security issued pursuant to this Indenture shall be made in accordance with such
form of Security and this Article XI; provided,  however,  that if any provision
of any such form of Security  shall  conflict with any provision of this Article
XI, the provision of such form of Security shall govern.  Each Security shall be
subject to partial redemption only in integral multiples of $100,000.

         SECTION 11.2.  Election to Redeem; Notice to Trustee.

         The  election  of the  Corporation  to redeem any  Securities  shall be
evidenced by or pursuant to a Board Resolution. In case of any redemption at the
election of the  Corporation,  the Corporation  shall, not less than 30 nor more
than 60 days prior to the  Redemption  Date  (unless a shorter  notice  shall be
satisfactory to the Trustee),  notify the Trustee and the Property Trustee under
the  related  Trust  Agreement,  of such  date and of the  principal  amount  of
Securities to be redeemed and provide the additional  information required to be
included in the notice or notices  contemplated  by Section 11.4;  provided that
for so long as the Securities are held by the Issuer Trust, such notice shall be
given  not less  than 30 nor more  than 75 days  prior to such  Redemption  Date
(unless a shorter notice shall be satisfactory to the Property Trustee under the
related Trust  Agreement).  In the case of any redemption of Securities prior to
the expiration of any  restriction on such  redemption  provided in the terms of
such  Securities,  the  Corporation  shall furnish the Trustee with an Officers'
Certificate  and  an  Opinion  of  Counsel   evidencing   compliance  with  such
restriction.

         SECTION 11.3.  Selection of Securities to be Redeemed.

         If less than all the  Securities  are to be  redeemed,  the  particular
Securities  to be redeemed  shall be selected not more than 60 days prior to the
Redemption Date by the Trustee,  from the Outstanding  Securities not previously
called  for  redemption,  by such  method  as the  Trustee  shall  deem fair and
appropriate  and which may provide for the selection for redemption of a portion
of the principal amount of any Security, provided that the unredeemed portion of
the  principal  amount of any Security  shall be in an  authorized  denomination
(which  shall not be less than the  minimum  authorized  denomination)  for such
Security.

         The Trustee shall  promptly  notify the  Corporation  in writing of the
Securities  selected for partial  redemption and the principal amount thereof to
be redeemed.  For all purposes of this Indenture,  unless the context  otherwise
requires,  all provisions relating to the redemption of Securities shall relate,
in the case of any  Security  redeemed  or to be redeemed  only in part,  to the
portion  of the  principal  amount  of such  Security  that has been or is to be
redeemed.


                                                         - 61 -






         SECTION 11.4.  Notice of Redemption.

         Notice  of  redemption  shall  be given by  first-class  mail,  postage
prepaid,  mailed not less than 30 nor more than 60 days prior to the  Redemption
Date, to each Holder of Securities to be redeemed, at the address of such Holder
as it appears in the  Securities  Register,  provided  that;  for so long as the
Securities  are held by the Issuer  Trust,  such notice  shall be given not less
than 30 nor more than 75 days prior to such  Redemption  Date  (unless a shorter
notice shall be  satisfactory  to the Property  Trustee  under the related Trust
Agreement).

         With respect to  Securities  to be redeemed,  each notice of redemption
shall state:

                  (a) the Redemption Date;

                  (b) the Redemption Price or, if the Redemption Price cannot be
         calculated  prior to the time the  notice is  required  to be sent,  an
         estimate of the  Redemption  Price together with a statement that it is
         an estimate and that the actual  Redemption Price will be calculated on
         the third  Business Day prior to the  Redemption  Date (and, if such an
         estimate of the Redemption Price is given, a subsequent notice shall be
         given as set  forth  above on the date that  such  Redemption  Price is
         calculated setting forth the actual Redemption Price);

                  (c)  if  less  than  all  Outstanding  Securities  are  to  be
         redeemed,  the identification  (and, in the case of partial redemption,
         the respective  principal  amounts) of the particular  Securities to be
         redeemed;

                  (d) if the  Securities are  convertible,  (A) that a Holder of
         Securities who desires to convert such Securities called for redemption
         must satisfy the requirements for conversion  contained in Article XIII
         below and (B) the Conversion Price;

                  (e) that on the Redemption  Date,  the  Redemption  Price will
         become due and payable upon each such Security or portion thereof,  and
         that interest thereon,  if any, shall cease to accrue on and after said
         date;and

                  (f) the  place  or  places  where  such  Securities  are to be
         surrendered for payment of the Redemption Price.

         Notice of  redemption  of  Securities to be redeemed at the election of
the  Corporation  shall be given by the  Corporation  or,  at the  Corporation's
request,  by the Trustee in the name and at the expense of the  Corporation  and
shall be irrevocable. The notice if mailed in the manner provided above shall be
conclusively  presumed  to have  been  duly  given,  whether  or not the  Holder
receives such notice.  In any case, a failure to give such notice by mail or any
defect in the notice to the Holder of any Security  designated for redemption as
a whole or in part shall not  affect the  validity  of the  proceedings  for the
redemption of any other Security.


                                                         - 62 -






         SECTION 11.5.  Deposit of Redemption Price.

         Prior to 10:00  a.m.,  New  York  City  time,  on the  Redemption  Date
specified in the notice of  redemption  given as provided in Section  11.4,  the
Corporation will deposit with the Trustee or with one or more Paying Agents (or,
if the  Corporation  is acting as its own Paying  Agent,  the  Corporation  will
segregate  and hold in trust as  provided  in  Section  10.3) an amount of money
sufficient to pay the Redemption  Price of, and any accrued interest on, all the
Securities (or portions thereof) that are to be redeemed on that date.

         SECTION 11.6.  Payment of Securities Called for Redemption.

         If any notice of redemption has been given as provided in Section 11.4,
the  Securities or portion of  Securities  with respect to which such notice has
been given  shall  become due and payable on the date and at the place or places
stated in such notice at the applicable  Redemption Price, together with accrued
interest  to  the  Redemption  Date.  On  presentation  and  surrender  of  such
Securities at a Place of Payment in said notice  specified,  the said Securities
or the specified  portions thereof shall be paid and redeemed by the Corporation
at the  applicable  Redemption  Price,  together  with  accrued  interest to the
Redemption Date; provided,  however,  that installments of interest whose Stated
Maturity is on or prior to the Redemption Date will be payable to the Holders of
such Securities,  or one or more Predecessor  Securities,  registered as such at
the close of business on the relevant  record dates according to their terms and
the provisions of Section 3.8.

         Upon   presentation  of  any  Security   redeemed  in  part  only,  the
Corporation shall execute and the Trustee shall  authenticate and deliver to the
Holder thereof, at the expense of the Corporation, a new Security or Securities,
of  authorized  denominations,  in  aggregate  principal  amount  equal  to  the
unredeemed  portion of the  Security so presented  and having the same  Original
Issue Date, Stated Maturity and terms.

         If any  Security  called  for  redemption  shall  not be so  paid  upon
surrender  thereof for  redemption,  the principal of (and premium,  if any, on)
such Security  shall,  until paid, bear interest from the Redemption Date at the
rate prescribed therefor in such Security.

     SECTION 11.7.  Right of Redemption  of  Securities  Initially  Issued to an
Issuer Trust.

         The  Corporation,  at its option,  may redeem such Securities (i) on or
after  December 31, 2004, in whole at any time or in part from time to time at a
Redemption  Price specified in such Security,  together with accrued interest to
but excluding  the  Redemption  Date,  (ii) upon the  occurrence  and during the
continuation  of a Tax  Event in whole  (but not in part) at any time  within 90
days following the occurrence and during the continuation of such Tax Event at a
Redemption  Price specified in such Security,  together with accrued interest to
but excluding the Redemption  Date,  (iii) upon a Change of Control of Employers
Reinsurance Corporation,  in whole at any time or in part from time to time at a
Redemption  Price  equal  to 100% of the  principal  amount  of the  Securities,
together, in the case of any such redemption, with accrued

                                                         - 63 -






interest to but excluding the Redemption Date, (iv) in connection with Employers
Reinsurance   Corporation's  proposed  transfer  or  disposition  of  Securities
pursuant  to Section  5.4(c) of the Trust  Agreement  or  Section  3.5(b) of the
Indenture,  in whole at any time or in part  from  time to time at a  Redemption
Price equal to 100% of the principal amount of the Securities,  together, in the
case  of any  such  redemption,  with  accrued  interest  to but  excluding  the
Redemption  Date and (v) on or after March 31, 1998,  in the event that the sale
of Industrial  Risk Insurers to Employers  Reinsurance  Corporation has not been
completed,  in whole at any time or in part  from  time to time at a  Redemption
Price equal to 100% of the principal amount of the Securities,  together, in the
case  of any  such  redemption,  with  accrued  interest  to but  excluding  the
Redemption Date.

         If less  than all the  Securities  are to be  redeemed,  the  aggregate
principal amount of such Securities remaining Outstanding after giving effect to
such  redemption  shall be  sufficient  to satisfy any  provisions  of the Trust
Agreement  related to the Issuer  Trust to which such  Securities  were  issued,
including any requirement in such Trust Agreement as to the minimum  Liquidation
Amount (as defined in such Trust  Agreement) of Capital  Securities  that may be
held by a holder of Capital Securities thereunder.

         SECTION 11.8.  Mandatory Redemption Provisions.

         (i) In the event of a Change of Control of HSB Group,  Inc. within five
years  after the  Original  Issuance  Date,  if the per share  price paid in the
acquisition  comprising  the  Change of  Control  is below  the per share  price
specified  below  for the year  within  which  the  Change  of  Control  occurs,
Employers  Reinsurance  Corporation,  at its option  (which  right  shall not be
transferable),  may require the Corporation to redeem all Outstanding Securities
in  whole  (but not in part)  at any  time at a  Redemption  Price  equal to the
Redemption Value for each Security as specified in the following table:



Redemption                 Minimum Per Share Price              Redemption Value
- ----------                 -----------------------              ----------------

Year 1                              $ 92.65                            109.00%

Year 2                                90.95                            107.00%

Year 3                                89.25                            105.00%

Year 4                                87.55                            103.00%

Year 5                                85.85                            101.00%



                                                         - 64 -






         The Minimum Per Share Price stated above shall be subject to adjustment
in accordance with the provisions of Article XIII.

         (ii) In  addition,  (A) if, on or prior to January 8, 1998,  after good
faith negotiation and revisions (if any) to the documentation in accordance with
the provisions of the Term Sheet attached to the Purchase  Agreement,  Employers
Reinsurance  Corporation  determines  that the  Securities do not conform to the
fundamental  economic  terms set forth in the Term Sheet or  contain  provisions
that impose material legal or tax consequences or risks on Employers Reinsurance
Corporation  that  could  not  have  been  reasonably  anticipated  prior to the
purchase  of  the  Securities  or  Employers  Reinsurance  Corporation  has  not
receieved  the  opinions of counsel  referred to in Section  7(b) and (c) of the
Purchase  Agreement,  or (B) on or after March 31,  1998,  in the event that the
sale of Industrial  Risk Insurers to Employers  Reinsurance  Corporation has not
been completed,  then, in the case of either (A) or (B),  Employers  Reinsurance
Corporation, at its option (which right shall not be transferable),  may require
the Corporation to redeem within sixty (60) days after notice to the Corporation
of such desired redemption all Outstanding Securities in whole (but not in part)
at any time at a Redemption  Price equal to 100% of the principal  amount of the
Securities,  together, in the case of any such redemption, with accrued interest
to but excluding the Redemption Date.


                                   ARTICLE XII

                      RANKING; SUBORDINATION OF SECURITIES

         SECTION 12.1.  Ranking; Securities Subordinate to Senior Indebtedness.

         The Corporation covenants and agrees, and each Holder of a Security, by
its acceptance thereof,  likewise covenants and agrees,  that, to the extent and
in the manner  hereinafter  set forth in this  Article  XII,  the payment of the
principal  of  (and  premium,  if  any)  and  interest  on  each  and all of the
Securities are hereby expressly made subordinate and subject in right of payment
to the prior  payment in full of all  Senior  Indebtedness.  The  payment of the
principal  of  (and  premium,  if  any)  and  interest  on  each  and all of the
Securities  shall rank pari passu with HSB Group,  Inc.'s  Global  Floating Rate
Junior Subordinated Debentures, Series B.

     SECTION 12.2. No Payment When Senior Indebtedness in Default;  Payment Over
of Proceeds Upon Dissolution, Etc.

         If the Corporation shall default in the payment of any principal of (or
premium,  if any) or interest on any Senior  Indebtedness  when the same becomes
due and  payable,  whether at maturity or at a date fixed for  prepayment  or by
declaration  of  acceleration  or otherwise,  then,  upon written notice of such
default to the Corporation by the holders of Senior  Indebtedness or any trustee
therefor, unless and until such default shall have been cured or waived or shall
have  ceased to exist,  no direct or  indirect  payment  (in cash,  property  or
securities,  by  set-off  or  otherwise)  shall be made or  agreed to be made on
account of the principal of (or premium, if

                                                         - 65 -






any) or  interest  on any of the  Securities,  or in respect of any  redemption,
repayment, retirement, purchase or other acquisition of any of the Securities.

         In  the  event  of  (a)  any  insolvency,   bankruptcy,   receivership,
liquidation,   reorganization,   readjustment,   composition  or  other  similar
proceedings relating to the Corporation,  its creditors or its property, (b) any
proceeding  for  the  liquidation,  dissolution  or  other  winding  up  of  the
Corporation,  voluntary or involuntary,  whether or not involving  insolvency or
bankruptcy proceedings, (c) any assignment by the Corporation for the benefit of
creditors or (d) any other  marshaling  of the assets of the  Corporation  (each
such event, if any, herein sometimes referred to as a "Proceeding"),  all Senior
Indebtedness  (including any interest thereon accruing after the commencement of
any  such  proceedings)  shall  first  be paid in full  before  any  payment  or
distribution,  whether in cash,  securities or other property,  shall be made to
any  Holder  of any  of the  Securities  on  account  thereof.  Any  payment  or
distribution,  whether  in  cash,  securities  or  other  property  (other  than
securities of the Corporation or any other corporation provided for by a plan of
reorganization or readjustment the payment of which is subordinate,  at least to
the  extent  provided  in these  subordination  provisions  with  respect to the
indebtedness  evidenced  by  the  Securities,  to  the  payment  of  all  Senior
Indebtedness  at the time  outstanding  and to any securities  issued in respect
thereof  under any such plan of  reorganization  or  readjustment),  that  would
otherwise (but for these subordination  provisions) be payable or deliverable in
respect of the Securities shall be paid or delivered  directly to the holders of
Senior  Indebtedness  in accordance with the priorities then existing among such
holders until all Senior  Indebtedness  (including any interest thereon accruing
after the commencement of any Proceeding) shall have been paid in full.

         In the event of any Proceeding, after payment in full of all sums owing
with respect to Senior  Indebtedness,  the Holders of the  Securities,  together
with the holders of any obligations of the Corporation  ranking on a parity with
the  Securities,  shall be entitled to be paid from the remaining  assets of the
Corporation the amounts at the time due and owing on account of unpaid principal
of (and  premium,  if  any)  and  interest  on the  Securities  and  such  other
obligations before any payment or other distribution,  whether in cash, property
or otherwise,  shall be made on account of any capital stock or any  obligations
of the Corporation ranking junior to the Securities and such other obligations.

         If,  notwithstanding the foregoing,  any payment or distribution of any
character or any security,  whether in cash, securities or other property (other
than  securities of the Corporation or any other  corporation  provided for by a
plan of reorganization  or readjustment the payment of which is subordinate,  at
least to the extent provided in these  subordination  provisions with respect to
the  indebtedness  evidenced  by the  Securities,  to the  payment of all Senior
Indebtedness  at the time  outstanding  and to any securities  issued in respect
thereof  under  any  such  plan of  reorganization  or  readjustment),  shall be
received  by the  Trustee  or any  Holder in  contravention  of any of the terms
hereof and  before  all Senior  Indebtedness  (including  any  interest  thereon
accruing after the commencement of any Proceeding) shall have been paid in full,
such  payment or  distribution  or  security  shall be received in trust for the
benefit of, and shall be paid over or delivered and  transferred to, the holders
of the Senior Indebtedness at the time outstanding in

                                                         - 66 -






accordance  with the priorities then existing among such holders for application
to the  payment  of all  Senior  Indebtedness  remaining  unpaid,  to the extent
necessary to pay all such Senior  Indebtedness  (including any interest  thereon
accruing after the  commencement  of any  Proceeding) in full. If the Trustee or
any  Holder  fails to  endorse  or  assign  any such  payment,  distribution  or
security, each holder of Senior Indebtedness is hereby irrevocably authorized to
endorse or assign the same.

         The  Trustee  and the Holders  shall take such  action  (including  the
delivery of this Indenture to an agent for the holders of Senior Indebtedness or
consent to the filing of a financing  statement with respect  hereto) as may, in
the opinion of counsel  designated  by the  holders of a majority  in  principal
amount of the Senior  Indebtedness  at the time  outstanding,  be  necessary  or
appropriate to assure the effectiveness of the  subordination  effected by these
provisions.

         The  provisions  of this  Section  12.2 shall not  impair  any  rights,
interests,  remedies or powers of any secured  creditor  of the  Corporation  in
respect of any security  interest the creation of which is not prohibited by the
provisions of this Indenture.

         The securing of any obligations of the Corporation,  otherwise  ranking
on a parity with the Securities or ranking junior to the  Securities,  shall not
be  deemed  to  prevent  such  obligations  from   constituting,   respectively,
obligations  ranking on a parity with the  Securities  or ranking  junior to the
Securities.

         SECTION 12.3.  Payment Permitted If No Default.

         Nothing contained in this Article XII or elsewhere in this Indenture or
in any of the Securities shall prevent (a) the Corporation,  at any time, except
during the  pendency  of the  conditions  described  in the first  paragraph  of
Section  12.2 or of any  Proceeding  referred  to in Section  12.2,  from making
payments at any time of  principal of (and  premium,  if any) or interest on the
Securities,  or (b) the application by the Trustee of any moneys  deposited with
it hereunder to the payment of or on account of the  principal of (and  premium,
if any) or interest on the  Securities  or the  retention of such payment by the
Holders,  if, at the time of such  application  by the Trustee,  it did not have
knowledge that such payment would have been prohibited by the provisions of this
Article XII.

         SECTION 12.4.  Subrogation to Rights of Holders of Senior Indebtedness.

         Subject to the  payment in full of all  amounts due or to become due on
all  Senior  Indebtedness,  or the  provision  for such  payment in cash or cash
equivalents  or  otherwise  in a manner  satisfactory  to the  holders of Senior
Indebtedness, the Holders of the Securities shall be subrogated to the extent of
the payments or  distributions  made to the holders of such Senior  Indebtedness
pursuant to the  provisions  of this  Article XII  (equally and ratably with the
holders of all  indebtedness  of the  Corporation  that by its express  terms is
subordinated to Senior Indebtedness of the Corporation to substantially the same
extent as the Securities are

                                                         - 67 -






subordinated  to the  Senior  Indebtedness  and is  entitled  to like  rights of
subrogation by reason of any payments or  distributions  made to holders of such
Senior Indebtedness) to the rights of the holders of such Senior Indebtedness to
receive payments and distributions of cash,  property and securities  applicable
to the Senior  Indebtedness  until the  principal of (and  premium,  if any) and
interest  on the  Securities  shall  be  paid  in  full.  For  purposes  of such
subrogation,  no  payments  or  distributions  to  the  holders  of  the  Senior
Indebtedness  of any cash,  property or  securities  to which the Holders of the
Securities  or the Trustee would be entitled  except for the  provisions of this
Article XII, and no payments over pursuant to the provisions of this Article XII
to the  holders  of Senior  Indebtedness  by Holders  of the  Securities  or the
Trustee,  shall, as among the  Corporation,  its creditors other than holders of
Senior  Indebtedness,  and the  Holders  of the  Securities,  be  deemed to be a
payment or  distribution  by the  Corporation  to or on  account of such  Senior
Indebtedness.

         SECTION 12.5.  Provisions Solely to Define Relative Rights.

         The provisions of this Article XII are and are intended  solely for the
purpose of defining the relative  rights of the Holders of the Securities on the
one hand and the  holders  of Senior  Indebtedness  on the other  hand.  Nothing
contained  in  this  Article  XII  or  elsewhere  in  this  Indenture  or in the
Securities is intended to or shall (a) impair,  as between the  Corporation  and
the Holders of the  Securities,  the obligations of the  Corporation,  which are
absolute  and  unconditional,  to pay  to the  Holders  of  the  Securities  the
principal of (and  premium,  if any) and interest on the  Securities as and when
the same shall become due and payable in accordance with their terms; (b) affect
the relative rights against the Corporation of the Holders of the Securities and
creditors of the Corporation  other than their rights in relation to the holders
of Senior Indebtedness; or (c) prevent the Trustee or the Holder of any Security
(or to the extent expressly provided herein, the holder of any Capital Security)
from exercising all remedies otherwise  permitted by applicable law upon default
under this  Indenture,  including  filing and voting  claims in any  Proceeding,
subject to the rights,  if any,  under this Article XII of the holders of Senior
Indebtedness  to receive  cash,  property and  securities  otherwise  payable or
deliverable to the Trustee or such Holder.

         SECTION 12.6.  Trustee to Effectuate Subordination.

         Each Holder of a Security,  by its acceptance  thereof,  authorizes and
directs  the  Trustee  on such  Holder's  behalf to take  such  action as may be
necessary or appropriate to acknowledge or effectuate the subordination provided
in this Article XII and appoints the Trustee such Holder's  attorney-in-fact for
any and all such purposes.

         SECTION 12.7.  No Waiver of Subordination Provisions.

         No right of any present or future holder of any Senior  Indebtedness to
enforce  subordination  as  herein  provided  shall  at any  time  in any way be
prejudiced  or  impaired  by any  act or  failure  to  act  on the  part  of the
Corporation or by any act or failure to act, in good faith,  by any such holder,
or by any noncompliance by the Corporation with the terms, provisions and

                                                         - 68 -






covenants of this Indenture,  regardless of any knowledge  thereof that any such
holder may have or be otherwise charged with.

         Without in any way limiting the generality of the immediately preceding
paragraph, the holders of Senior Indebtedness may, at any time and from to time,
without  the  consent  of or  notice  to  the  Trustee  or  the  Holders  of the
Securities,  without  incurring  responsibility  to  such  Holders  and  without
impairing or releasing the  subordination as provided in this Article XII or the
obligations hereunder of such Holders to the holders of Senior Indebtedness,  do
any one or more of the  following:  (i)  change  the  manner,  place or terms of
payment  or  extend  the  time  of  payment  of,  or  renew  or  alter,   Senior
Indebtedness, or otherwise amend or supplement in any manner Senior Indebtedness
or any  instrument  evidencing  the same or any  agreement  under  which  Senior
Indebtedness is outstanding; (ii) sell, exchange, release or otherwise deal with
any property pledged, mortgaged or otherwise securing Senior Indebtedness; (iii)
release  any  Person  liable  in  any  manner  for  the   collection  of  Senior
Indebtedness;  and (iv) exercise or refrain from  exercising  any rights against
the Corporation and any other Person.

         SECTION 12.8.  Notice to Trustee.

         The Corporation  shall give prompt written notice to the Trustee of any
fact known to the  Corporation  that would prohibit the making of any payment to
or by the Trustee in respect of the Securities.  Notwithstanding  the provisions
of this Article or any other provision of this Indenture,  the Trustee shall not
be charged with  knowledge of the existence of any facts that would prohibit the
making of any payment to or by the Trustee in respect of the Securities,  unless
and until the  Trustee  shall have  received  written  notice  thereof  from the
Corporation  or a holder of Senior  Indebtedness  or from any trustee,  agent or
representative therefor;  provided,  however, that if the Trustee shall not have
received the notice provided for in this Section 12.8 at least two Business Days
prior to the date upon which by the terms  hereof any monies may become  payable
for any purpose (including the payment of the principal of (and premium, if any,
on) or  interest  on any  Security),  then,  anything  herein  contained  to the
contrary  notwithstanding,  the Trustee  shall have full power and  authority to
receive  such  monies and to apply the same to the  purpose  for which they were
received  and shall not be  affected by any notice to the  contrary  that may be
received by it within two Business Days prior to such date.

         Subject to the provisions of Section 6.1, the Trustee shall be entitled
to rely on the  delivery  to it of a  written  notice  by a Person  representing
himself  or  herself  to be a holder of  Senior  Indebtedness  (or a trustee  or
attorney-in-fact  therefor)  to  establish  that such notice has been given by a
holder of Senior  Indebtedness (or a trustee or attorney-in-fact  therefor).  If
the Trustee  determines  in good faith that  further  evidence is required  with
respect  to the  right of any  Person  as a holder  of  Senior  Indebtedness  to
participate  in any payment or  distribution  pursuant to this  Article XII, the
Trustee  may  request  such  Person  to  furnish   evidence  to  the  reasonable
satisfaction of the Trustee as to the amount of Senior Indebtedness held by such
Person,  the extent to which such  Person is  entitled  to  participate  in such
payment or  distribution  and any other  facts  pertinent  to the rights of such
Person under this Article XII, and if such evidence is

                                                         - 69 -






not furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

     SECTION 12.9.  Reliance on Judicial  Order or  Certificate  of  Liquidating
Agent.

         Upon any payment or distribution of assets of the Corporation  referred
to in this Article XII, the Trustee,  subject to the  provisions of Section 6.1,
and the  Holders of the  Securities  shall be entitled to rely upon any order or
decree entered by any court of competent jurisdiction in which any Proceeding is
pending,  or a certificate of the trustee in bankruptcy,  receiver,  liquidating
trustee, custodian, assignee for the benefit of creditors, agent or other Person
making such payment or distribution,  delivered to the Trustee or to the Holders
of  Securities,  for  the  purpose  of  ascertaining  the  Persons  entitled  to
participate  in  such  payment  or  distribution,  the  holders  of  the  Senior
Indebtedness and other  indebtedness of the  Corporation,  the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article XII.

         SECTION 12.10.  Trustee Not Fiduciary for Holders of Senior 
Indebtedness.

         The Trustee, in its capacity as trustee under this Indenture, shall not
be deemed to owe any fiduciary  duty to the holders of Senior  Indebtedness  and
shall not be liable to any such holders if it shall in good faith mistakenly pay
over or  distribute to Holders of  Securities  or to the  Corporation  or to any
other  Person  cash,  property  or  securities  to which any  holders  of Senior
Indebtedness shall be entitled by virtue of this Article XII or otherwise.

     SECTION  12.11.  Rights  of  Trustee  as  Holder  of  Senior  Indebtedness;
Preservation of Trustee's Rights.

         The  Trustee in its  individual  capacity  shall be entitled to all the
rights set forth in this  Article  XII with  respect to any Senior  Indebtedness
that may at any time be held by it, to the same  extent  as any other  holder of
Senior Indebtedness,  and nothing in this Indenture shall deprive the Trustee of
any of its rights as such holder.

         SECTION 12.12.  Article Applicable to Paying Agents.

         If at any time any Paying Agent other than the Trustee  shall have been
appointed by the Corporation and be then acting hereunder, the term "Trustee" as
used in this Article shall in such case (unless the context otherwise  requires)
be construed as extending to and including  such Paying Agent within its meaning
as fully for all intents and purposes as if such Paying Agent were named in this
Article in addition to or in place of the Trustee.


                                                         - 70 -






         SECTION 12.13.  Certain Conversions or Exchanges Deemed Payment.

         For the purpose of this Article only,  (a) the issuance and delivery of
junior  securities upon conversion or exchange of Securities shall not be deemed
to  constitute  a payment or  distribution  on account of the  principal  of (or
premium,  if any) or interest on the Securities or on account of the purchase or
other  acquisition of Securities,  and (b) the payment,  issuance or delivery of
cash  (including  any payments for  fractional  shares),  property or securities
(other than junior  securities)  upon conversion or exchange of a Security shall
be deemed to constitute  payment on account of the  principal of such  security.
For the purpose of this Section,  the term "junior  securities" means (i) shares
of any stock of any class of the  Company  and (ii)  securities  of the  Company
which are subordinated in right of payment to all Senior  Indebtedness which may
be  outstanding  at the time of  issuance  or  delivery  of such  securities  to
substantially  the same extent as, or to a greater  extent than,  the Securities
are so subordinated as provided in this Article.


                                  ARTICLE XIII

                            CONVERSION OF SECURITIES

         SECTION 13.1.  Conversion  Rights.  Subject to and upon compliance with
the provisions of this Article and subject to the receipt by the Corporation and
the Holder of the  appropriate  Regulatory  Approvals (as defined below) and the
termination  of the  applicable  waiting  periods  under  the  Hart-Scott-Rodino
Antitrust  Improvements Act of 1976, as amended, and the related regulations and
published interpretations,  the Securities are convertible, at the option of the
Holder,  into  fully  paid  and  nonassessable  shares  of  Common  Stock of the
Corporation at an initial  conversion rate of 11.7647 shares of Common Stock for
each $1,000 in aggregate  principal amount of Securities  (equal to a conversion
price of $85 per share of Common  Stock),  subject to adjustment as described in
this Article XIII (as adjusted the "Conversion  Price").  A Holder of Securities
may convert  any portion of the  principal  amount of the  Securities  into that
number of fully paid and nonassessable  shares of Common Stock (calculated as to
each  conversion  to the nearest  1/100th of a share)  obtained by dividing  the
principal  amount of the Securities to be converted by the Conversion  Price. In
case a Security or portion  thereof is called for  redemption,  such  conversion
right in respect of the  Security or portion so called shall expire at the close
of  business  on  the  Business  Day  immediately  preceding  the  corresponding
Redemption Date, unless the Corporation  defaults in making the payment due upon
redemption.

         "Regulatory  Approvals" shall mean all necessary  insurance  regulatory
and other filings and/or approvals and any licenses and permits, authorizations,
consents, orders or approvals of, or registrations, declarations or filings with
all regulatory  bodies as may be required to be obtained or made with respect to
either  party in order to permit the  parties  to  consummate  the  transactions
contemplated  hereby which are to be consummated on or prior to the Closing Date
(as defined in the Trust Agreement).


                                                         - 71 -






         SECTION 13.2. Conversion  Procedures.  (a) In order to convert all or a
portion of the  Securities,  the Holder  thereof  shall  deliver to the Property
Trustee,  as conversion agent or to such other agent appointed for such purposes
(the  "Conversion  Agent")  an  irrevocable  Notice  of  Conversion  in the form
attached hereto as Exhibit C setting forth the principal amount of Securities to
be  converted,  together  with the name or names,  if other than the Holder,  in
which the shares of Common Stock should be issued upon conversion and, surrender
to the  Conversion  Agent the  Securities  to be  converted,  duly  endorsed  or
assigned  to the  Corporation  or in blank.  In  addition,  a holder of  Capital
Securities  may  exercise  its right under the Trust  Agreement  to convert such
Capital  Securities  into Common Stock by delivering to the Conversion  Agent an
irrevocable Notice of Conversion setting forth the information called for by the
preceding  sentence and  directing  the  Conversion  Agent (i) to exchange  such
Capital  Security  for a  portion  of the  Securities  held by the  Trust (at an
exchange rate of $1000 principal amount of Securities for each Capital Security)
and (ii) to immediately convert such Securities,  on behalf of such holder, into
Common  Stock of the  Corporation  pursuant  to this  Article  XIII and, if such
Capital Securities are in definitive form, surrendering such Capital Securities,
duly endorsed or assigned to the Corporation or in blank. So long as any Capital
Securities are  outstanding,  the Trust shall not convert any Securities  except
pursuant to a Notice of Conversion delivered to the Conversion Agent by a holder
of Capital Securities.

         If a Notice of Conversion  is delivered on or after the Regular  Record
Date and prior to the subsequent  Interest Payment Date, the Holder of record on
the Regular  Record Date will be  entitled to receive the  interest  paid on the
subsequent  Interest  Payment Date on the portion of  Securities to be converted
notwithstanding  the  conversion  thereof prior to such  Interest  Payment Date.
However,  if  aredemption  date falls  between a record date and the  subsequent
Interest Payment Date, the holder will be entitled to receive,  on such Interest
Payment Date,  the interest  accured to, but  excluding,  the  redemption  date.
Except  as  otherwise  provided  in the  first  and  second  sentences  of  this
paragraph, in the case of any Security which is converted, interest whose Stated
Maturity is on or after the date of  conversion  of such  Security  shall not be
payable,  and the  Corporation  shall not make nor be required to make any other
payment,  adjustment or allowance with respect to accrued but unpaid interest on
the Securities being  converted,  which shall be deemed to be paid in full. Each
conversion shall be deemed to have been effected  immediately prior to the close
of  business  on the day on which the Notice of  Conversion  was  received  (the
"Conversion  Date") by the Conversion  Agent from the Holder or from a holder of
the Capital Securities effecting a conversion thereof pursuant to its conversion
rights  under the Trust  Agreement,  as the case may be.  The  Person or Persons
entitled to receive the Common  Stock  issuable  upon such  conversion  shall be
treated for all purposes as the record holder or holders of such Common Stock as
of the  Conversion  Date and such  Person or  Persons  will cease to be a record
Holder  or record  Holders  of the  Securities  on that  date.  As  promptly  as
practicable on or after the Conversion  Date,  the  Corporation  shall issue and
deliver at the office of the Conversion Agent,  unless otherwise directed by the
Holder or holder in the Notice of Conversion,  a certificate or certificates for
the  number of full  shares  of  Common  Stock  issuable  upon such  conversion,
together with the cash payment,  if any, in lieu of any fraction of any share to
the Person or Persons  entitled to receive the same. The Conversion  Agent shall
deliver such certificate or certificates to such Person or Persons.

                                                         - 72 -







                  (b) The  Corporation's  delivery upon  conversion of the fixed
number of shares of Common  Stock  into  which the  Securities  are  convertible
(together with the cash payment,  if any, in lieu of fractional shares) shall be
deemed to satisfy the  Corporation's  obligation to pay the principal  amount at
Maturity of the  portion of  Securities  so  converted  and any unpaid  interest
accrued on such Securities at the time of such conversion.

                  (c) No  fractional  shares of Common Stock will be issued as a
result of  conversion,  but in lieu thereof,  the  Corporation  shall pay to the
Conversion  Agent a cash  adjustment  in an amount equal to the same fraction of
the Current Market Price with respect to such fractional interest on the date on
which  the  Securities  or  Capital  Securities,  as the case may be,  were duly
surrendered to the Conversion Agent for conversion,  and the Conversion Agent in
turn will make such  payment,  if any,  to the Holder of the  Securities  or the
holder of the Capital Securities so converted.

                  (d) In the event of the  conversion  of any  Security  in part
only, a new Security or Securities for the  unconverted  portion thereof will be
issued in the name of the Holder thereof upon the  cancellation  of the Security
converted in part in accordance with Section 3.5.

                  (e) In effecting the conversion transactions described in this
Section,  the  Conversion  Agent is acting as agent of the  holders  of  Capital
Securities (in the exchange of Capital  Securities for  Securities) and as agent
of the  Holders of  Securities  (in the  conversion  of  Securities  into Common
Stock),  as the case may be. The  Conversion  Agent is hereby  authorized (i) to
exchange  Securities held by the Trust from time to time for Capital  Securities
in connection with the conversion of such Capital  Securities in accordance with
this  Article XIII and (ii) to convert all or a portion of the  Securities  into
Common Stock and  thereupon to deliver such shares of Common Stock in accordance
with the  provisions  of this  Article  XIII and to  deliver  to the Trust a new
Security or Securities for any resulting unconverted principal amount.

                  (f) All shares of Common Stock  delivered  upon any conversion
of   Restricted   Securities   shall  bear  a  Restrictive   Securities   Legend
substantially  in the  form  of the  legend  required  to be set  forth  on such
Securities and shall be subject to the restrictions on transfer provided in such
legend and in Section 3.5 hereof.  Neither the Trustee nor the Conversion  Agent
shall  have  any  responsibility  for  the  inclusion  or  content  of any  such
Restrictive Securities Legend on such Common Stock; provided,  however, that the
Trustee or the Conversion Agent shall have provided to the Corporation or to the
Corporation's  transfer  agent for such Common Stock,  prior to or  concurrently
with  a  request  to  the  Corporation  to  deliver  to  such  Conversion  Agent
certificates for such Common Stock, written notice that the Securities delivered
for conversion are Restricted Securities.

                  (g) The  Corporation  shall  at all  times  reserve  and  keep
available out of its authorized and unissued  Common Stock,  solely for issuance
upon the conversion of the Securities,  such number of shares of Common Stock as
shall from time to time be issuable upon the  conversion  of all the  Securities
then  outstanding.  Notwithstanding  the  foregoing,  the  Corporation  shall be
entitled  to  deliver  upon  conversion  of  Securities  shares of Common  Stock
reacquired and held

                                                         - 73 -






in the treasury of the  Corporation  (in lieu of the issuance of authorized  and
unissued  shares of Common Stock) so long as any such  treasury  shares are free
and clear of all liens,  charges,  security interests or encumbrances.  Whenever
the Corporation  issues shares of Common Stock upon conversion of Securities and
the  Corporation  has in effect at such time a share purchase  rights  agreement
under which holders of Common Stock are issued rights  ("Rights")  entitling the
holders under certain circumstances to purchase an additional share or shares of
stock,  the  Corporation  will  issue,  together  with each such share of Common
Stock,  such number of Rights  (which number may be a fraction) as shall at that
time be issuable  with a share of Common Stock  pursuant to such share  purchase
rights agreement (currently, half of a Right). Any shares of Common Stock issued
upon conversion of the Securities shall be duly  authorized,  validly issued and
fully paid and  nonassessable.  The Conversion Agent shall deliver the shares of
Common Stock received upon conversion of the Securities to the converting Holder
free and clear of all  liens,  charges,  security  interests  and  encumbrances,
except  for United  States  withholding  taxes.  The  Corporation  shall use its
reasonable  best  efforts  to  obtain  and keep in force  such  governmental  or
regulatory  permits or other  authorizations as may be required by law, in order
to enable the  Corporation to lawfully issue Common Stock upon conversion of the
Securities  and to  lawfully  deliver  the  Common  Stock  to each  Holder  upon
conversion of the Securities.

                  (h) The  Corporation  will pay any and all  taxes  that may be
payable  in  respect  of the issue or  delivery  of  shares  of Common  Stock on
conversion of Securities. The Corporation shall not, however, be required to pay
any tax which may be payable in respect of any  transfer  involved  in the issue
and  delivery  of shares of Common  Stock in a name other than that in which the
Securities so converted were registered,  and no such issue or delivery shall be
made  unless  and  until  the  Person  requesting  such  issue  has  paid to the
Conversion  Agent  the  amount  of  any  such  tax,  or has  established  to the
satisfaction of the Conversion Agent that such tax has been paid.

                  (i) Nothing in this Article  XIII shall limit the  requirement
of the  Corporation to withhold taxes pursuant to the terms of the Securities or
as set  forth  in  this  Agreement  or  otherwise  require  the  Trustee  or the
Corporation to pay any amounts on account of such withholdings.

     SECTION 13.3.  Conversion Price Adjustments.  The conversion price shall be
subject to adjustment (without duplication) from time to time as follows:

                  (a) In case the Corporation shall, while any of the Securities
are outstanding,  (i) pay a dividend or make a distribution  with respect to its
Common Stock in shares of Common Stock, (ii) subdivide its outstanding shares of
Common  Stock,  (iii)  combine  its  outstanding  shares of Common  Stock into a
smaller  number of shares or (iv)  issue by  reclassification  of its  shares of
Common  Stock any shares of capital  stock of the  Corporation,  the  conversion
privilege and the Conversion  Price in effect  immediately  prior to such action
shall be adjusted so that the Holder of any  Securities  thereafter  surrendered
for  conversion  shall be  entitled  to receive  the number of shares of capital
stock of the Corporation  which he would have owned  immediately  following such
action had such Securities been converted immediately prior thereto. An ad-

                                                         - 74 -






justment made pursuant to this subsection (a) shall become effective immediately
after the record date in the case of a dividend or other  distribution and shall
become effective  immediately after the effective date in case of a subdivision,
combination  or  reclassification  (or  immediately  after the record  date if a
record date shall have been  established for such event).  If, as a result of an
adjustment  made  pursuant to this  subsection  (a),  the Holder of any Security
thereafter surrendered for conversion shall become entitled to receive shares of
two or more classes or series of capital stock of the Corporation,  the Board of
Directors (whose  determination  shall be conclusive and shall be described in a
Board  Resolution  filed with the Trustee) shall determine the allocation of the
adjusted  Conversion  Price between or among shares of such classes or series of
capital  stock.  In the event  that such  dividend,  distribution,  subdivision,
combination or issuance is not so paid or made, the Conversion Price shall again
be  adjusted  to be the  Conversion  Price which would then be in effect if such
record date had not been fixed.

                  (b) In case the Corporation shall, while any of the Securities
are  Outstanding,  issue  rights or warrants to all holders of its Common  Stock
entitling  them (for a period  expiring  within 45 days  after the  record  date
mentioned  below) to subscribe for or purchase shares of Common Stock at a price
per share less than the Current  Market  Price per share of Common  Stock on the
record date mentioned  below,  the Conversion  Price for the Securities shall be
adjusted so that the same shall equal the price  determined by  multiplying  the
Conversion  Price in effect  immediately  prior to the date of  issuance of such
rights or warrants by a fraction of which the  numerator  shall be the number of
shares of Common  Stock  outstanding  on the date of  issuance of such rights or
warrants  plus the number of shares which the  aggregate  offering  price of the
total number of shares so offered for subscription or purchase would purchase at
such Current Market Price,  and of which the denominator  shall be the number of
shares of Common  Stock  outstanding  on the date of  issuance of such rights or
warrants  plus the  number of  additional  shares of Common  Stock  offered  for
subscription or purchase.  Such adjustment  shall become  effective  immediately
after the record date for the determination of stockholders  entitled to receive
such rights or  warrants.  To the extent  that no shares of Common  Stock are so
delivered after the expiration of such rights or warrants,  the Conversion Price
shall be adjusted to the Conversion  Price whixh would then be in effect if such
date fixed for the determination of stockholders entitled to receive such rights
or warrants had not been fixed. For the purposes of this subsection,  the number
of shares of Common Stock at any time outstanding  shall not include shares held
in the treasury of the Corporation.  The Corporation  shall not issue any rights
or  warrants  in respect of shares of Common  Stock held in the  treasury of the
Corporation.  In case any rights or warrants  referred to in this  subsection in
respect of which an  adjustment  shall have been made shall  expire  unexercised
within 45 days  after the same  shall  have  been  distributed  or issued by the
Corporation,  the  Conversion  Price  shall  be  readjusted  at the time of such
expiration  to the  Conversion  Price  that  would  have  been in  effect  if no
adjustment  had been made on account of the  distribution  or  issuance  of such
expired rights or warrants.

                  (c) Subject to the last sentence of this subparagraph, in case
the Corporation  shall,  by dividend or otherwise,  distribute to all holders of
its Common Stock evidences of its indebtedness, shares of any class or series of
capital stock, cash or assets(or rights or warrants

                                                         - 75 -






to subscribe for or purchase any of its securities,  but excluding any rights or
warrants  referred to in  subparagraph  (b), any dividend or  distribution  paid
exclusively in cash and any dividend or distribution referred to in subparagraph
(a) of this Section  13.3),  the  Conversion  Price shall be reduced so that the
same shall equal the price  determined by multiplying  the  Conversion  Price in
effect  immediately prior to the effectiveness of the Conversion Price reduction
contemplated by this subparagraph (c) by a fraction of which the numerator shall
be the Current  Market Price per share of the Common Stock on the date fixed for
the payment of such  distribution  (the  "Reference  Date") less the fair market
value  (as   determined  in  good  faith  by  the  Board  of  Directors,   whose
determination  shall be conclusive and described in a resolution of the Board of
Directors),  on  the  Reference  Date,  of  the  portion  of  the  evidences  of
indebtedness, shares of capital stock, cash and assets so distributed or of such
subscription  rights or warrants applicable to one share of Common Stock and the
denominator  shall be such current  market price per share of the Common  Stock,
such reduction to become effective  immediately prior to the opening of business
on the day following the Reference Date;  provided,  however,  that in the event
the  numerator  shall be less than  one,  in lieu of the  foregoing  adjustment,
adequate  provision  shall be made so that each Holder of Securities  shall have
the right to receive upon conversion the amount of such distribution such Holder
would have received had such Holder converted each Security immediately prior to
the reference  date. In the event that such dividend or  distribution  is not so
paid or made, the Conversion  Price shall again be adjusted to be the Conversion
Price which would then be in effect if such  dividend  or  distribution  had not
occurred.  If the Board of  Directors  determines  the fair market  value of any
distribution for purposes of this subparagraph (c) by reference to the actual or
when issued trading market for any securities  comprising such distribution,  it
must in doing so consider the prices in such market over the same period used in
computing the current  market price per share of Common  Stock.  For purposes of
this  subparagraph  (c), any dividend or  distribution  that includes  shares of
Common Stock or rights or warrants to subscribe for or purchase shares of Common
Stock  shall be deemed  instead  to be (i) a  dividend  or  distribution  of the
evidences of  indebtedness,  shares of capital stock,  cash or assets other than
such shares of Common  Stock or such rights or warrants  (making any  Conversion
Price reduction required by this subparagraph (c)) immediately  followed by (ii)
a dividend  or  distribution  of such  shares of Common  Stock or such rights or
warrants (making any further conversion price reduction required by subparagraph
(a) or (b)),  except (A) the Reference Date of such dividend or  distribution as
defined in this subparagraph shall be substituted as (x) "the record date in the
case of a dividend  or other  distribution,"  and (y) "the  record  date for the
determination  of stockholders  entitled to receive such rights or warrants" and
(z) "the date fixed for such determination"  within the meaning of subparagraphs
(a) and (b) and (B) any shares of Common  Stock  included  in such  dividend  or
distribution  shall not be deemed  outstanding  for  purposes of  computing  any
adjustment of the conversion price in subparagraph (a).

                  (d) If the distribution date for the Rights of the Corporation
provided in the Shareholders Rights Plan, as presently  constituted or under any
similar plan occurs prior to the Conversion Date, and a Holder of the Securities
who converts such  Securities  after such  distribution  date is not entitled to
receive  the  Rights  that  would  otherwise  be  attached  (but for the date of
conversion) to the shares of Common Stock received upon such conversion, then an

                                                         - 76 -






adjustment  shall be made to the  Conversion  Price  pursuant  to clause (ii) of
Section  13.4(a)  as  if  the  Rights  were  being  distributed  to  the  common
stockholders of the Corporation immediately prior to such conversion. If such an
adjustment is made and the Rights are later redeemed, invalidated or terminated,
then a corresponding reversing adjustment shall be made to the Conversion Price,
on an equitable basis, to take account of such event.

                  (e) The  Corporation  shall have the right to reduce from time
to time the Conversion  Price by any amount  selected by the Corporation for any
period of at least 30 days,  provided,  that Corporation  shall give at least 15
days'  notice of such  reduction to the Trustee and the  Property  Trustee.  The
Corporation may, at its option, make such reductions in the Conversion Price, in
addition to those set forth above in Section 13.3(a),  as the Board of Directors
deems  advisable  to avoid or diminish any income tax to holders of Common Stock
resulting  from any  dividend  or  distribution  of stock (or  rights to acquire
stock) or from any event treated as such for income tax purposes.  No adjustment
of the  Conversion  Price will be made upon the issuance of any shares of Common
Stock pursuant to any present or future plan providing for the  reinvestment  of
dividends  or  interest  payable  on  securities  of  the  Corporation  and  the
investment  of additional  optional  amounts in shares of Common Stock under any
such plan, or the issuance of any shares of Common Stock or options or rights to
purchase such shares pursuant to any present or future employee  benefit plan or
program of the  Corporation  or  pursuant  to any  option,  warrant,  right,  or
exercisable,  exchangeable or convertible  security which does not constitute an
issuance to all holders of Common Stock of rights or warrants  entitling holders
of such rights or warrants to  subscribe  for or purchase  Common  Stock at less
than  the  Current  Market  Price.  There  shall  also be no  adjustment  of the
Conversion  Price in case of the  issuance  of any Common  Stock (or  securities
convertible  into or  exchangeable  for Common  Stock),  except as  specifically
described above.

                  (f) If any action would require  adjustment of the  Conversion
Price  pursuant to more than one of the  provisions  described  above,  only one
adjustment  shall be made and such adjustment  shall be the amount of adjustment
that has the highest absolute value to the Holder of the Securities.

     SECTION  13.4.  Notice of  Adjustments  of Conversion  Price.  Whenever the
Conversion Price is adjusted as herein provided:

                  (a) the  Corporation  shall  compute the  adjusted  conversion
price and shall prepare a certificate  signed by the Chief Financial  Officer or
the Treasurer of the Corporation setting forth the adjusted conversion price and
showing in reasonable  detail the facts upon which such adjustment is based, and
such certificate shall forthwith be filed with the Trustee, the Conversion Agent
and the transfer agent for the Capital Securities and the Securities; and

                  (b) a notice  stating the  Conversion  Price has been adjusted
and setting forth the adjusted  Conversion Price shall as soon as practicable be
mailed by the  Corporation to all record  holders of Capital  Securities and the
Securities at their last  addresses as they appear upon the stock transfer books
of the Corporation and the Trust and the Securities Registrar.

                                                         - 77 -







         SECTION 13.5.  Prior Notice of Certain Events.
                  In case:

                           (i) the  Corporation  shall  declare any dividend (or
         any other  distribution) on its Common Stock, other than (x) a dividend
         payable  in shares of Common  Stock or (y) a  dividend  payable in cash
         that would not require an adjustment pursuant to Section 13.3(c);

                           (ii) the Corporation  shall authorize the granting to
         all holders of Common Stock of rights or warrants to  subscribe  for or
         purchase  any  shares  of stock of any  class or series or of any other
         rights or warrants;

                           (iii) of any  reclassification of Common Stock (other
         than a subdivision or combination of the outstanding Common Stock, or a
         change in par value,  or from par value to no par value, or from no par
         value to par  value),  or of any  consolidation  or merger to which the
         Corporation  is a party and for which approval of  stockholders  of the
         Corporation  shall be  required,  or of the sale or  transfer of all or
         substantially all of the assets of the Corporation or of any compulsory
         share  exchange  whereby  the  Common  Stock is  converted  into  other
         securities, cash or other property; or

                         (iv)  of  the  voluntary  or  involuntary  dissolution,
         liquidation or winding up of the Corporation;

then the Corporation  shall (A) if any Capital  Securities are outstanding under
the Trust  Agreement,  cause to be filed with the transfer agent for the Capital
Securities, and shall cause to be mailed to the holders of record of the Capital
Securities, at their last addresses as they shall appear upon the stock transfer
books of the Trust or (B) shall  cause to be mailed to all Holders at their last
addresses as they shall appear in the Security Register,  at least 15 days prior
to the  applicable  record or effective  date  hereinafter  specified,  a notice
stating  (x) the date on which a record (if any) is to be taken for the  purpose
of such dividend, distribution,  rights or warrants or, if a record is not to be
taken, the date as of which the holders of Common Stock of record to be entitled
to such dividend,  distribution,  rights or warrants are to be determined or (y)
the date on which such reclassification,  consolidation, merger, sale, transfer,
share  exchange,  dissolution,  liquidation  or winding up is expected to become
effective,  and the date as of which it is expected that holders of Common Stock
of record  shall be  entitled  to  exchange  their  shares  of Common  Stock for
securities,  cash or other  property  deliverable  upon  such  reclassification,
consolidation,  merger, sale, transfer, share exchange, dissolution, liquidation
or winding up (but no  failure to mail such  notice or any defect  therein or in
the mailing  thereof shall affect the validity of the corporate  action required
to be specified in such notice).


                                                         - 78 -






         SECTION 13.6. Dividend or Interest Reinvestment Plans.  Notwithstanding
anything  to the  contrary  in this  Article  13, the  issuance of any shares of
Common Stock pursuant to any plan providing for the reinvestment of dividends or
interest  payable  on  securities  of the  Corporation  and  the  investment  of
additional  optional  amounts in shares of Common Stock under any such plan, and
the issuance of any shares of Common Stock or options or rights to purchase such
shares  pursuant to any employee  benefit plan or program of the  Corporation or
pursuant  to  any  option,  warrant,  right  or  exercisable,   exchangeable  or
convertible  security  outstanding  as of the date  the  Securities  were  first
issued,  shall  not be deemed  to  constitute  an  issuance  of Common  Stock or
exercisable,  exchangeable or convertible securities by the Corporation to which
any of the adjustment provisions described above applies. There shall also be no
adjustment  of the  Conversion  Price in case of the  issuance  of any stock (or
securities convertible into or exchangeable for stock) of the Corporation except
as specifically described in this Article XIII.

         SECTION 13.7.  Certain Additional Rights.

         In case the  Corporation  shall,  by dividend or otherwise,  declare or
make  a  distribution  on  its  Common  Stock  referred  to in  Section  13.3(c)
(including,  without limitation,  dividends or distributions  referred to in the
last  sentence  of Section  13.3(c)),  the Holders of the  Securities,  upon the
conversion thereof subsequent to the close of business on the date fixed for the
determination of stockholders entitled to receive such distribution and prior to
the  effectiveness  of the  Conversion  Price  adjustment  in  respect  of  such
distribution,  shall also be entitled to receive for each share of Common  Stock
into which the  Securities  are  converted,  the portion of the shares of Common
Stock,  rights,  warrants,  evidences of indebtedness,  shares of capital stock,
cash  and  assets  so  distributed  applicable  to one  share of  Common  Stock;
provided,  however,  that, at the election of the  Corporation  (whose  election
shall be evidenced by a resolution  of the Board of  Directors)  with respect to
all Holders so converting,  the Corporation may, in lieu of distributing to such
Holder any portion of such  distribution not consisting of cash or securities of
the  Corporation,  pay such  Holder an amount in cash  equal to the fair  market
value  thereof (as  determined  in good faith by the Board of  Directors,  whose
determination  shall be conclusive and described in a resolution of the Board of
Directors).  If any  conversion  of  Securities  described  in  the  immediately
preceding  sentence  occurs  prior to the  payment  date for a  distribution  to
holders of Common Stock which the Holder of  Securities so converted is entitled
to  receive  in  accordance  with  the  immediately   preceding  sentence,   the
Corporation  may elect (such  election to be evidenced  by a  resolution  of the
Board of  Directors)  to  distribute to such Holder a due bill for the shares of
Common Stock,  rights,  warrants,  evidences of indebtedness,  shares of capital
stock, cash or assets to which such Holder is so entitled,  provided,  that such
due bill  (i)  meets  any  applicable  requirements  of the  principal  national
securities exchange or other market on which the Common Stock is then traded and
(ii)  requires  payment or  delivery  of such  shares of Common  Stock,  rights,
warrants, evidences of indebtedness,  shares of capital stock, cash or assets no
later  than the date of  payment  or  delivery  thereof  to holders of shares of
Common Stock receiving such distribution.


                                                         - 79 -






         SECTION 13.8.  Restrictions on Common Stock Issuable Upon Conversion.

                  (a) Shares of Common Stock to be issued upon  conversion  of a
Security in respect of Restricted Capital Securities shall bear such restrictive
legends as the Corporation may provide in accordance with applicable law.

                  (b) If shares of Common Stock to be issued upon  conversion of
a Security in respect of Restricted Capital Securities are to be registered in a
name other than that of the Holder of such Capital Security,  then the Person in
whose name such shares of Common Stock are to be registered  must deliver to the
Conversion  Agent a certificate  satisfactory  to the  Corporation and signed by
such Person,  as to compliance with the  restrictions on transfer  applicable to
such Capital Security. Neither the Trustee nor any Conversion Agent or Registrar
shall be required to register in a name other than that of the Holder  shares of
Common  Stock  issued upon  conversion  of any such  Security in respect of such
Capital Securities not so accompanied by a properly completed certificate.

     SECTION 13.9.  Trustee Not Responsible for Determining  Conversion Price or
Adjustments.

         Neither the Trustee nor any Conversion Agent shall at any time be under
any duty or  responsibility  to any Holder of any Security or to any holder of a
Capital  Security  to  determine  whether  any facts exist which may require any
adjustment of the Conversion  Price,  or with respect to the nature or extent of
any such adjustment when made, or with respect to the method employed, or herein
or in any supplemental  indenture  provided to be employed,  in making the same.
Neither the Trustee nor any Conversion  Agent shall be accountable  with respect
to the  validity or value (or the kind of account) of any shares of Common Stock
or of any  securities or property,  which may at any time be issued or delivered
upon the conversion of any Security;  and neither the Trustee nor any Conversion
Agent makes any representation with respect thereto. Neither the Trustee nor any
Conversion Agent shall be responsible for any failure of the Corporation to make
any cash payment or to issue,  transfer or deliver any shares of Common Stock or
stock  certificates  or other  securities  or property upon the surrender of any
Security for the purpose of conversion, or, except as expressly herein provided,
to comply with any of the covenants of the  Corporation  contained in Article 10
or this Article 13.


                                   ARTICLE XIV

                                    EXPENSES

SECTION 14.1.  Payment of Expenses by the Corporation.

                  The  Corporation   hereby   irrevocably  and   unconditionally
guarantees to each person or entity to whom any Issuer Trust is now or hereafter
becomes indebted or liable (the "Expense  Beneficiaries") the full payment, when
and as due, of any and all Expense Obligations (as hereinafter  defined) to such
Expense Beneficiaries. As used herein, "Expense Obligations" means

                                                         - 80 -






any costs,  expenses or liabilities of any Issuer Trust,  other than obligations
of an Issuer Trust to pay to holders of any Capital  Securities or other similar
interests  in such Issuer  Trust the amounts  due such  holders  pursuant to the
terms of the Capital Securities or such other similar interests, as the case may
be. This Article XIV is intended to be for the benefit of, and to be enforceable
by, all such Expense  Beneficiaries,  whether or not such Expense  Beneficiaries
have received notice hereof.

SECTION 14.2.  Term of Agreement.

                  This Article XIV shall  terminate  and be of no further  force
and effect with  respect to holders of  securities  of an Issuer  Trust upon the
later of (a) the date on which full payment has been made of all amounts payable
to  all  holders  of  all  the  Capital  Securities  (whether  upon  redemption,
liquidation,  exchange or  otherwise)  of such Issuer  Trust and (b) the date on
which there are no Expense Beneficiaries remaining; provided, however, that this
Article XIV shall continue to be effective or shall be  reinstated,  as the case
may be, with respect to such Issuer Trust,  if at any time any holder of Capital
Securities of such Issuer Trust or any Expense  Beneficiary must restore payment
of any sums paid under the Capital  Securities of such Issuer  Trust,  under any
Expense Obligation, under the guarantee agreement by the Corporation in favor of
holders of Capital Securities of such Issuer Trust or under this Article XIV for
any reason whatsoever. Subject to the terms of this Article XIV, the obligations
of  the  Corporation  under  this  Article  XIV  are  continuing,   irrevocable,
unconditional and absolute.

SECTION 14.3.  Waiver of Notice.

         The  Corporation  hereby waives notice of acceptance of the  agreements
contained in this Article XIV and of any Expense  Obligation to which it applies
or may apply, and the Corporation hereby waives presentment, demand for payment,
protest, notice of nonpayment,  notice of dishonor, notice of redemption and all
other notices and demands.

SECTION 14.4.  No Impairment.

         The  obligations,  covenants,  agreements and duties of the Corporation
under this  Article XIV shall in no way be affected or impaired by reason of the
happening from time to time of any of the following:

                  (a) the  extension of time for the payment by the Trust of all
or any portion of the Expense  Obligations  or for the  performance of any other
obligation   under,   arising  out  of,  or  in  connection  with,  the  Expense
Obligations;

                  (b) any failure,  omission,  delay or lack of diligence on the
part of the  Expense  Beneficiaries  to enforce,  assert or exercise  any right,
privilege,  power or remedy conferred on the Expense  Beneficiaries with respect
to the  Expense  Obligations  or any  action  on the  part of the  Issuer  Trust
granting indulgence or extension of any kind; or


                                                         - 81 -






                  (c) the  voluntary or  involuntary  liquidation,  dissolution,
sale of any collateral, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors,  reorganization,  arrangement, composition or readjustment
of debt of,  or other  similar  proceedings  affecting,  the Trust or any of the
assets of the Issuer Trust.

There shall be no obligation of the Expense  Beneficiaries to give notice to, or
obtain the consent of, the  Corporation  with respect to the happening of any of
the foregoing.

SECTION 14.5.  Enforcement.

                  An Expense  Beneficiary  may  enforce  this  Article  directly
against  the  Corporation  and the  Corporation  waives  any  right or remedy to
require  that any action be  brought  against  the Trust or any other  person or
entity before proceeding against the Corporation.

SECTION 14.6.  Subrogation.

         The Corporation shall be subrogated to all (if any) rights of the Trust
in respect of any amounts paid to the Expense  Beneficiaries  by the Corporation
under this Article XIV with respect to the  applicable  Issuer Trust;  provided,
however,  that the  Corporation  shall not  (except  to the extent  required  by
mandatory provisions of law) be entitled to enforce or exercise any rights which
it may acquire by way of subrogation or any  indemnity,  reimbursement  or other
agreement,  in all cases as a result of payment  under this  Article XIV, if, at
the time of any such payment,  any amounts are due and unpaid under this Article
XIV.

SECTION 14.7.  Amendment.

                  So  long as  there  remains  any  Expense  Beneficiary  or any
Capital  Securities of an Issuer Trust are  outstanding,  this Article XIV shall
not be modified or amended in any manner adverse to such Expense  Beneficiary of
such Issuer  Trust or to the holders of the  Capital  Securities  of such Issuer
Trust without the written  consent of such Expense  Beneficiary or such holders,
as applicable.

         This Indenture may be executed in any number of  counterparts,  each of
which so executed shall be deemed to be an original,  but all such  counterparts
shall together constitute but one and the same instrument.

                                                         - 82 -






         IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed and attested, all as of the day and year first above written.


                                    HSB GROUP, INC.


                                    By:  /s/ Saul L. Basch
                                    Name:  Saul L. Basch
                                    Title: Senior Vice President, Chief
                                    Financial Officer, Treasurer


Attest: 

By:     /s/ R. Kevin Price
        Corporate Secretary



                                   THE FIRST NATIONAL BANK OF
                                   CHICAGO, as Trustee


                                   By: /s/ Melissa G. Weisman
                                   Name: Melissa G. Weisman
                                   Title:     Vice President


Attest:

By:














                                                Exhibit A -- Form of Restricted
                                                Securities Transfer Certificate








                        RESTRICTED SECURITIES CERTIFICATE

                  (For transfers pursuant to Section 3.5(b) of
                        the Indenture referred to below)


[-------------------------],
  as Securities Registrar
[address]

Re: 7.0% Convertible  Subordinated  Deferrable Interest Debentures of HSB Group,
Inc. (the "Securities")

         Reference is made to the Indenture,  dated as of December 31, 1997 (the
"Indenture"),  between HSB Group, Inc., a Connecticut corporation, and The First
National  Bank of  Chicago,  as  Trustee.  Terms used  herein and defined in the
Indenture or in  Regulation  S, Rule 144A or Rule 144 under the U.S.  Securities
Act of 1933, as amended (the "Securities Act"), are used herein as so defined.

                  This certificate  relates to $__________  aggregate  principal
amount of Securities,  which are evidenced by the following  certificate(s) (the
"Specified Securities"):

                  CUSIP No(s). ___________________________

                  CERTIFICATE No(s). _____________________

The person in whose name this certificate is executed below (the  "Undersigned")
hereby  certifies  that  either  (i)  it is the  sole  beneficial  owner  of the
Specified Securities or (ii) it is acting on behalf of all the beneficial owners
of the  Specified  Securities  and is duly  authorized  by  them to do so.  Such
beneficial  owner or owners are referred to herein  collectively as the "Owner".
Such Specified  Securities are registered in the name of the Undersigned,  as or
on behalf of the Owner.

         The Owner has requested that the Specified Securities be transferred to
another  person  (the  "Transferee")  who will  take  delivery  in the form of a
Restricted  Security.  In  connection  with  such  transfer,  the  Owner  hereby
certifies that,  unless such transfer is being effected pursuant to an effective
registration  statement  under  the  Securities  Act,  it is being  effected  in
compliance  with  the  requirements  of the  Securities  Act or  pursuant  to an
applicable exemption therefrom and in accordance with all applicable  securities
laws of the states of the United States and other jurisdictions.

         This certificate and the statements  contained herein are made for your
benefit and the benefit of the  Corporation and the Purchaser (as defined in the
Trust  Agreement  relating  to the  Issuer  Trust to which the  Securities  were
initially issued).



                                       A-1









Dated:
                                                     (Print   the  name  of  the
                                                     Undersigned,  as such  term
                                                     is  defined  in the  second
                                                     paragraph      of      this
                                                     certificate.)


                                                     By:
                                                     Name:
                                                     Title:

                                                     (If  the  Undersigned  is a
                                                     corporation, partnership or
                                                     fiduciary, the title of the
                                                     person signing on behalf of
                                                     the  Undersigned   must  be
                                                     stated.)


                                       A-2





                       EXHIBIT B -- Form of Unrestricted
                       Securities Transfer Certificate


                       UNRESTRICTED SECURITIES CERTIFICATE

                 (For  removal of  Securities  Act  Legends  pursuant to Section
3.5(c) of the Indenture )


The First National Bank of Chicago
One First National Plaza - Suite 0126
Chicago, Illinois 60670-0126

Attention:  Corporate Trust Administration

Re:  7.0%  Convertible   Subordinated   Deferrable   Interest   Debentures  (the
"Securities")

                  Reference is made to the  Indenture,  dated as of December 31,
1997, between HSB Group. Inc. (the "Corporation") and The First National Bank of
Chicago,  as  Trustee  (the  "Trustee").  Terms used  herein and  defined in the
Indenture or in Regulation S or Rule 144 under the U.S.  Securities Act of 1933,
as amended (the "Securities Act"), are used herein as so defined.

         This  certificate  relates to  ________________  shares of  Securities,
which  are   evidenced  by  the   following   certificate(s)   (the   "Specified
Securities"):

         CUSIP No(s). ____________________________

         CERTIFICATE No(s). ______________________

         The  person in whose  name this  certificate  is  executed  below  (the
"Undersigned")  hereby certifies that either (i) it is the sole beneficial owner
of the Specified Securities or (ii) it is acting on behalf of all the beneficial
owners of the Specified Securities and is duly authorized by them to do so. Such
beneficial  owner or owners are referred to herein  collectively as the "Owner".
The Specified  Securities are registered in the name of the Undersigned as or on
behalf of the Owner.

         The Owner has requested that the Specified  Securities be exchanged for
Securities  bearing no Securities  Act Legend  pursuant to Section 5.4(d) of the
Trust  Agreement and Section  3.5(c) of the Indenture.  In connection  with such
exchange,  the Owner hereby  certifies  that the  exchange is occurring  after a
holding period of at least two years  (computed in accordance with paragraph (d)
of Rule 144) has elapsed since the Specified  Securities were last acquired from
the Trust or from an affiliate of the Trust,  whichever is later,  and the Owner
is not, and during the preceding  three months has not been, an affiliate of the
Trust.  The Owner also  acknowledges  that any future transfers of the Specified
Securities must comply with all applicable  securities laws of the states of the
United States and other jurisdictions.


                                       B-1






         This certificate and the statements  contained herein are made for your
benefit and the benefit of the Trust and the Purchaser.

Dated:___________________________________
                  (Print the name of the Undersigned, as such term is defined in
                  the second paragraph of this certificate.)



                  By:____________________________
                  Name:
                  Title:


                  (If  the   Undersigned  is  a   corporation,   partnership  or
                  fiduciary,  the title of the  person  signing on behalf of the
                  Undersigned must be stated.)



                                       B-2




                                                                EXHIBIT C


                           NOTICE OF CONVERSION

To:      HSB Group, Inc.

         The undersigned owner of this Security hereby irrevocably exercises the
option to convert this Security,  or the portion below  designated,  into Common
Stock of HSB GROUP, INC. in accordance with the terms of the Indenture  referred
to in this Security,  and directs that the shares issuable and deliverable  upon
conversion,  together with any check in payment for fractional shares, be issued
in the name of and  delivered to the  undersigned,  unless a different  name has
been indicated in the assignment  below.  If shares are to be issued in the name
of a person other than the  undersigned,  the undersigned  will pay all transfer
taxes payable with respect thereto.

         Any Holder,  upon the exercise of its  conversion  rights in accordance
with the  terms of the  Indenture  and the  Security,  agrees to be bound by the
terms of the Registration Rights Agreement relating to the Common Stock issuable
upon conversion of the Security.

Date:             

in whole
        ----------
                                          Portions of Security to be converted
in part                                  ($1,000 or integral multiples thereof):
        ----------
                                          $
                                            ----------------------------      

                                            ----------------------------
                                          Signature (for conversion only)

                                   Please Print or Typewrite Name and
                                   Address, Including Zip Code, and Social
                                   Security or Other Identifying Number

                                   ------------------------------------



Signature Guarantee: *
                       ---------------------
*        Signature must be guaranteed by an institution which is a member of one
         of the  following  recognized  Signature  Guaranty  Programs:  (i)  The
         Securities Transfer Agent Medallion Program (STAMP);  (ii) The New York
         Stock  Exchange  Medallion  Program  (MSP);  (iii) The  Stock  Exchange
         Medallion  Program  (SEMP);  or (iv) in such other  guarantee  programs
         acceptable to the Trustee.

0148917.04-01S7a
                                                   C-1