EXHIBIT 4.5


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                              ENSERCH CORPORATION



                                       TO



                      THE FIRST NATIONAL BANK OF CHICAGO,

                                    TRUSTEE



                                   __________



                                   INDENTURE


                        DATED AS OF FEBRUARY ____, 1994



                          SUBORDINATED DEBT SECURITIES



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Reconciliation and tie between Trust Indenture Act of 1939 and
Indenture, dated as of February _____, 1994




     TRUST INDENTURE
     ACT SECTION                              INDENTURE SECTION
                                              
(S) 310(a)(1)..............................   609
       (a)(2)..............................   609
       (a)(3)..............................   Not Applicable
       (a)(4)..............................   Not Applicable
       (b).................................   608, 610
(S) 311(a).................................   613
       (b).................................   613
(S) 312(a).................................   701, 702(a)
       (b).................................   702(b)
       (c).................................   702(c)
(S) 313(a).................................   703(a)
       (b).................................   703(a)
       (c).................................   703(a)
       (d).................................   703(b)
(S) 314(a).................................   704
       (a)(4)..............................   101, 1004
       (b).................................   Not Applicable
       (c)(1)..............................   102
       (c)(2)..............................   102
       (c)(3)..............................   Not Applicable
       (d).................................   Not Applicable
       (e).................................   102
(S) 315(a).................................   601
       (b).................................   602
       (c).................................   601
       (d).................................   601
       (e).................................   514
(S) 316(a).................................   101
       (a)(1)(A)...........................   502, 512
       (a)(1)(B)...........................   513
       (a)(2)..............................   Not Applicable
       (b).................................   508
       (c).................................   104(c)
(S) 317(a)(1)..............................   503
       (a)(2)..............................   504
       (b).................................   1003
(S) 318(a).................................   107



 
                               TABLE OF CONTENTS

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                                                                     ----

                                                                
PARTIES............................................................   1
RECITALS OF THE COMPANY............................................   1

                                   ARTICLE I

                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION

 Section  101.   Definitions.......................................   1
     Act...........................................................   2
     Affiliate; control............................................   2
     Authenticating Agent..........................................   2
     Board of Directors............................................   2
     Board Resolution..............................................   2
     Book-Entry Security...........................................   2
     Business Day..................................................   2
     Commission....................................................   2
     Company.......................................................   2
     Common Stock..................................................   2
     Company Request; Company Order................................   3
     Conversion Price..............................................   3
     Corporate Trust Office........................................   3
     corporation...................................................   3
     Defaulted Interest............................................   3
     Depository....................................................   3
     Discharged....................................................   3
     Event of Default..............................................   3
     Foreign Government Securities.................................   3
     Holder........................................................   3
     Indenture.....................................................   3
     interest......................................................   4
     Interest Payment Date.........................................   4
     Judgment Currency.............................................   4
     Maturity......................................................   4
     Officers' Certificate.........................................   4
     Opinion of Counsel............................................   4
     Original Issue Discount Security..............................   4
     Outstanding...................................................   4
     Paying Agent..................................................   5
     Person........................................................   5
     Place of Payment..............................................   5
     Predecessor Security..........................................   5
     Redemption Date...............................................   5 
     Redemption Price..............................................   5
     Regular Record Date...........................................   5
     Required Currency.............................................   6
     Securities....................................................   6
     Security Register.............................................   6
     Senior Indebtedness...........................................   6
     Special Record Date...........................................   6
     Stated Maturity...............................................   6
     Subsidiary....................................................   6
     Trustee.......................................................   6
     Trust Indenture Act...........................................   6
     U.S. Government Securities....................................   7
     Vice President................................................   7
     Voting Stock..................................................   7
 

 

 
                                                                
 Section 102.    Compliance Certificates and Opinions.............     7
 Section 103.    Form of Documents Delivered to Trustee...........     8
 Section 104.    Acts of Holders; Record Dates....................     8
 Section 105.    Notices, Etc., to Trustee and Company............    10
 Section 106.    Notice to Holders; Waiver........................    10
 Section 107.    Conflict with Trust Indenture Act................    11
 Section 108.    Effect of Headings and Table of Contents.........    11
 Section 109.    Successors and Assigns...........................    11
 Section 110.    Separability Clause..............................    11
 Section 111.    Benefits of Indenture............................    11
 Section 112.    Governing Law....................................    11
 Section 113.    Legal Holidays...................................    11
 Section 114.    Currency Conversion..............................    12

                                   ARTICLE II

                                 SECURITY FORMS

 Section 201.    Forms Generally..................................    12
 Section 202.    Form of Trustee's Certificate of Authentication..    13
 Section 203.    Form of Legend for Book-Entry Securities.........    13

                                  ARTICLE III

                                 THE SECURITIES

 Section 301.    Amount Unlimited; Issuable in Series..............   13
 Section 302.    Denominations.....................................   16
 Section 303.    Execution, Authentication, Delivery and Dating....   16
 Section 304.    Temporary Securities..............................   17
 Section 305.    Registration, Registration of Transfer and 
                 Exchange..........................................   18
 Section 306.    Mutilated, Destroyed, Lost and Stolen Securities..   19
 Section 307.    Payment of Interest; Interest Rights Preserved....   20
 Section 308.    Persons Deemed Owners.............................   21
 Section 309.    Cancellation......................................   21
 Section 310.    Computation of Interest...........................   21

                                   ARTICLE IV

                           SATISFACTION AND DISCHARGE

 Section 401.    Satisfaction and Discharge of Indenture...........   22
 Section 402.    Application of Trust Money........................   23
 Section 403.    Satisfaction, Discharge and Defeasance of 
                 Securities of any Series..........................   23
 Section 404.    Covenant Defeasance of Securities of any Series...   24
 Section 405.    Reinstatement.....................................   25

                                   ARTICLE V

                                    REMEDIES

 Section 501.    Events of Default.................................   26
 Section 502.    Acceleration of Maturity; Rescission and 
                 Annulment.........................................   27
 Section 503.    Collection of Indebtedness and Suits for 
                 Enforcement by Trustee............................   28
 Section 504.    Trustee May File Proofs of Claim..................   28
 Section 505.    Trustee May Enforce Claims Without Possession of 
                 Securities........................................   29
 Section 506.    Application of Money Collected....................   29
 Section 507.    Limitation on Suits...............................   29
 Section 508.    Unconditional Right of Holders to Receive 
                 Principal, Premium and Interest...................   30
 

                                      ii

 

                                                                
 Section 509.    Restoration of Rights and Remedies................   30
 Section 510.    Rights and Remedies Cumulative....................   30
 Section 511.    Delay or Omission Not Waiver......................   30
 Section 512.    Control by Holders................................   31
 Section 513.    Waiver of Past Defaults...........................   31
 Section 514.    Undertaking for Costs.............................   31
 Section 515.    Waiver of Stay or Extension Laws..................   31

                                   ARTICLE VI

                                  THE TRUSTEE

 Section 601.    Certain Duties and Responsibilities...............   32
 Section 602.    Notice of Defaults................................   32
 Section 603.    Certain Rights of Trustee.........................   32
 Section 604.    Not Responsible for Recitals or Issuance of 
                 Securities........................................   33
 Section 605.    May Hold Securities...............................   34
 Section 606.    Money Held in Trust...............................   34
 Section 607.    Compensation and Reimbursement....................   34
 Section 608.    Disqualification; Conflicting Interests...........   35
 Section 609.    Corporate Trustee Required; Eligibility...........   35
 Section 610.    Resignation and Removal; Appointment of Successor.   35
 Section 611.    Acceptance of Appointment by Successor............   36
 Section 612.    Merger, Conversion, Consolidation or Succession 
                 to Business.......................................   37
 Section 613.    Preferential Collection of Claims Against Company.   37
 Section 614.    Appointment of Authenticating Agent...............   38

                                  ARTICLE VII

               HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

 Section 701.    Company to Furnish Trustee Names and Addresses 
                 of Holders........................................   39
 Section 702.    Preservation of Information; Communications to  
                 Holders...........................................   39
 Section 703.    Reports by Trustee................................   40
 Section 704.    Reports by Company................................   40

                                  ARTICLE VIII

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

 Section 801.    Company May Consolidate, Etc., Only on Certain 
                 Terms.............................................   40
 Section 802.    Successor Substituted.............................   41

                                   ARTICLE IX

                            SUPPLEMENTAL INDENTURES

 Section 901.    Supplemental Indentures Without Consent of Holders   41
 Section 902.    Supplemental Indentures with Consent of Holders...   42
 Section 903.    Execution of Supplemental Indentures..............   43
 Section 904.    Effect of Supplemental Indentures.................   44
 Section 905.    Conformity with Trust Indenture Act...............   44
 Section 906.    Reference in Securities to Supplemental Indentures   44

                                   ARTICLE X

                                   COVENANTS

Section 1001.    Payment of Principal, Premium and Interest........   44
Section 1002.    Maintenance of Office or Agency...................   44
Section 1003.    Money for Securities Payments to Be Held in Trust.   45
Section 1004.    Statement by Officers as to Default...............   46
 

                                      
                                      iii

 

                                                                
 Section 1005.   Existence.........................................   46
 Section 1006.   Waiver of Certain Covenants.......................   46

                                   ARTICLE XI

                            REDEMPTION OF SECURITIES

 Section 1101.   Applicability of Article..........................   46
 Section 1102.   Election to Redeem; Notice to Trustee.............   47
 Section 1103.   Selection by Trustee of Securities to Be Redeemed    47
 Section 1104.   Notice of Redemption..............................   48
 Section 1105.   Deposit of Redemption Price.......................   48
 Section 1106.   Securities Payable on Redemption Date.............   49
 Section 1107.   Securities Redeemed in Part.......................   49

                                  ARTICLE XII

                                 SINKING FUNDS

 Section 1201.   Applicability of Article..........................   49
 Section 1202.   Satisfaction of Sinking Fund Payments with 
                 Securities........................................   50
 Section 1203.   Redemption of Securities for Sinking Fund.........   50

                                  ARTICLE XIII

                            CONVERSION OF SECURITIES

 Section 1301.   Applicability; Conversion Privilege and Conversion 
                 Price.............................................   50
 Section 1302.   Exercise of Conversion Privilege..................   51
 Section 1303.   Fractions of Shares...............................   51
 Section 1304.   Adjustment of Conversion Price....................   52
 Section 1305.   Notice of Adjustments of Conversion Price.........   54
 Section 1306.   Notice of Certain Corporate Action................   54
 Section 1307.   Company to Reserve Common Stock...................   55
 Section 1308.   Taxes on Conversion...............................   55
 Section 1309.   Covenant as to Common Stock.......................   56
 Section 1310.   Cancellation of Converted Securities..............   56
 Section 1311.   Provisions in Case of Consolidation, Merger or 
                 Sale of Assets....................................   56

                                  ARTICLE XIV

                          SUBORDINATION OF SECURITIES

 Section 1401.   Securities Subordinate to Senior Indebtedness.....   57
 Section 1402.   Payment over of Proceeds of Securities on 
                 Dissolution, etc..................................   57
 Section 1403.   Priority of Senior Indebtedness upon Maturity.....   59
 Section 1404.   Obligation of Company to pay Holders of 
                 Securities not Affected...........................   59
 Section 1405.   Trustee as Holder of Senior Indebtedness..........   60
 Section 1406.   Notice to Trustee to Effectuate Subordination.....   60
 Section 1407.   Modification, Extension, etc. of Senior 
                 Indebtedness......................................   60
 Section 1408.   Trustee has no Fiduciary Duty to Holders of Senior
                 Indebtedness......................................   60
 Section 1409.   Paying Agents other than the Trustee..............   61
 Section 1410.   Rights of Holders of Senior Indebtedness Not 
                 Impaired..........................................   61
 Section 1411.   All Indenture Provisions Subject to Subordination
                 Provisions........................................   61
 
 TESTIMONIUM.......................................................
 SIGNATURES AND SEALS..............................................
 ACKNOWLEDGMENTS...................................................


                                      iv

 
         INDENTURE, dated as of February _____, 1994, between ENSERCH
Corporation, a corporation duly organized and existing under the laws of the
State of Texas (herein called the "Company"), having its principal office at 300
South St. Paul, Dallas, Texas  75201, and The First National Bank of Chicago, a
national banking association duly organized and existing under the laws of the
United States, as Trustee (herein called the "Trustee").

                            RECITALS OF THE COMPANY

         The Company has duly authorized the execution and delivery of this
Indenture to provide for the issuance from time to time of its unsecured
debentures, notes or other evidences of indebtedness (herein called the
"Securities"), to be issued in one or more series as in this Indenture provided.

         All things necessary to make this Indenture a valid agreement of the
Company, 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 agreed, for the equal and
proportionate benefit of all Holders of the Securities or of series thereof, as
follows:

                                   ARTICLE I

                        DEFINITIONS AND OTHER PROVISIONS
                             OF GENERAL APPLICATION

         Section 101.    Definitions.

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

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

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

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

         (4)  the words "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 104.

         "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 614 to act on behalf of the Trustee to authenticate
Securities of one or more series.

         "Board of Directors" means either the board of directors of the Company
or any duly authorized committee of that board.

         "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of Directors and to be in full force and effect on the date of such
certification, and delivered to the Trustee.

         "Book-Entry Security" means a Security bearing the legend specified in
Section 203, evidencing all or part of the Securities of a series and registered
in the name of the Depository or its nominee.

         "Business Day", when used with respect to any Place of Payment, means
each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which
banking institutions in that Place of Payment are authorized or obligated by law
to close.

         "Commission" means the Securities and Exchange Commission, as from time
to time constituted, created under the Securities Exchange Act of 1934, or, if
at any time after the execution of this instrument such Commission is not
existing and performing the duties now assigned to it under the Trust Indenture
Act, then the body performing such duties at such time.

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

         "Common Stock" includes any stock of any class of the Company which has
no preference in respect of dividends or of amounts payable in the event of any
voluntary or involuntary liquidation, dissolution or winding-up of the Company
and which is not subject to redemption by the Company.  However, subject to the
provisions of Section 1311, shares issuable on conversion of Securities of a
series shall include only shares of the class designated as Common Stock of the
Company at the date of this instrument or shares of any class or classes
resulting from any reclassification or reclassifications thereof and which have
no preference in respect of dividends or of amounts payable in the event of any
voluntary or involuntary liquidation, dissolution or winding-up of the Company
and which are not subject to redemption by the Company; provided that if at any
time there shall be more than one such resulting class, the shares of each such
class then so issuable shall be substantially in the proportion which the total
number of shares of such class resulting from all such reclassifications bears
to the total number of shares of all such classes resulting from all such
reclassifications.

         "Company Request" or "Company Order" means a written request or order
signed in the name of the Company by its Chairman, its President or a Vice
President, and by its Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary, and delivered to the Trustee.

         "Conversion Price" has the meaning specified in Section 1301.

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

                                       2

 
         "corporation" means corporations, associations, joint stock companies
and business trusts.

         "Defaulted Interest" has the meaning specified in Section 307.

         "Depository" means, with respect to the Securities of any series
issuable or issued in whole or in part in the form of one or more Book-Entry
Securities, the clearing agency registered under the Securities Exchange Act of
1934, as amended, specified for that purpose as contemplated by Section 301.

         "Discharged" has the meaning specified in Section 403.

         "Event of Default" has the meaning specified in Section 501.

         "Foreign Government Securities" as used in Section 403 means, with
respect to Securities of any series that are denominated in a currency other
than United States dollars, securities that are (i) direct obligations of the
government that issued such currency for the payment of which obligations its
full faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of such government, the
timely payment of which is unconditionally guaranteed as a full faith and credit
obligation by such government, which, in either case under clauses (i) or (ii),
are not callable or redeemable at the option of the issuer thereof.

         "Holder" means a Person in whose name a Security is registered in the
Security 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.
The term "Indenture" shall also include the terms of particular series of
Securities established as contemplated by Section 301, provided, however, that,
                                                       --------  -------       
if at any time more than one Person is acting as Trustee under this instrument
due to the appointment of one or more separate Trustees for any one or more
separate series of Securities pursuant to Section 610(e), "Indenture" shall
mean, with respect to such series of Securities for which any such Person is
Trustee, 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 and shall include the terms of
particular series of Securities for which such Person is Trustee established as
contemplated by Section 301, exclusive, however, of any provisions or terms
which relate solely to other series of Securities for which such Person is not
Trustee, regardless of when such terms or provisions were adopted, and exclusive
of any provisions or terms adopted by means of one or more indentures
supplemental hereto executed and delivered after such Person had become such
Trustee but to which such Person, as such Trustee, was not a party.

         "interest", when used with respect to an Original Issue Discount
Security which by its terms bears interest only after Maturity, means interest
payable after Maturity.

         "Interest Payment Date", when used with respect to any Security, means
the Stated Maturity of an installment of interest on such Security.

         "Judgment Currency" has the meaning specified in Section 114.

         "Maturity", when used with respect to any Security, means the date on
which the principal of such Security or an 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.

                                       3

 
         "Officers' Certificate" means a certificate signed by the Chairman, the
President or a Vice President, and by the Treasurer, an Assistant Treasurer, the
Secretary or an Assistant Secretary, of the Company, and delivered to the
Trustee.

         "Opinion of Counsel" means a written opinion of counsel, who may be
counsel to or an employee of the Company and who shall be acceptable to the
Trustee.

         "Original Issue Discount Security" means any Security which provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

         "Outstanding", when used with respect to Securities, means, 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 or redemption money in the necessary
     amount has been theretofore deposited with the Trustee or any Paying Agent
     (other than the Company) in trust or set aside and segregated in trust by
     the Company (if the Company shall act as its own Paying Agent) for the
     Holders of such Securities; provided that, if such Securities are to be
     redeemed, notice of such redemption has been duly given pursuant to this
     Indenture or provision therefor satisfactory to the Trustee has been made;
     and

         (iii)  Securities which have been paid pursuant to Section 306 or in
     exchange for or in lieu of which other Securities have been authenticated
     and delivered pursuant to this Indenture, other than any such Securities in
     respect of which there shall have been presented to the Trustee proof
     satisfactory to it that such Securities are held by a bona fide purchaser
     in whose hands such Securities are valid obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, (i) the principal
amount of an Original Issue Discount Security that shall be deemed to be
Outstanding shall be the amount of the principal thereof that would be due and
payable as of the date of such determination upon acceleration of the Maturity
thereof pursuant to Section 502, (ii) the principal amount of a Security
denominated in one or more foreign currencies or currency units shall be the
U.S. dollar equivalent, determined in the manner provided as contemplated by
Section 114 and Section 301 on the date of original issuance of such Security,
of the principal amount (or, in the case of an Original Issue Discount Security,
the U.S. dollar equivalent on the date of original issuance of such Security of
the amount determined as provided in (i) above) of such Security, and (iii)
Securities owned by the Company or any other obligor upon the Securities or any
Affiliate of the Company or of 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 which the Trustee knows to
be so owned shall be so disregarded.  Securities so owned which 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

                                       4

 
is not the Company or any other obligor upon the Securities or any Affiliate of
the Company or of such other obligor.

         "Paying Agent" means any Person authorized by the Company to pay the
principal of (and premium, if any) or interest on any Securities on behalf of
the Company.

         "Person" means any individual, corporation, partnership, joint venture,
association, joint stock company, trust, unincorporated organization or
government or any agency or political subdivision thereof.

         "Place of Payment", when used with respect to the Securities of any
series, means the place or places where the principal of and any premium and
interest on the Securities of that series are payable as specified as
contemplated by Section 301.

         "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; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 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.

         "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.

         "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.

         "Regular Record Date" for the interest payable on any Interest Payment
Date on the Securities of any series means the date specified for that purpose
as contemplated by Section 301.

         "Required Currency" has the meaning specified in Section 114.

         "Securities" has the meaning stated in the first recital of this
Indenture and more particularly means any Securities authenticated and delivered
under this Indenture, provided, however, that if at any time there is more than
one Person acting as Trustee under this Indenture, "Securities" with respect to
the Indenture as to which such Person is Trustee shall have the meaning stated
in the first recital of this Indenture and shall more particularly mean
Securities authenticated and delivered under this Indenture, exclusive, however,
of Securities of any series as to which such Person is not Trustee.

         "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

         "Senior Indebtedness" of the Company means the principal of and
premium, if any, and interest on the indebtedness (other than the Securities) of
the Company, whether outstanding on the date of this Indenture or thereafter
created, incurred, assumed or guaranteed, (a) for money borrowed from or
guaranteed to others, (b) under promissory notes or debentures, bonds or other
instruments of indebtedness issued under the provisions of or pursuant to an
indenture, agreement, or similar instrument, or (c) for the payment of money
relating to the lease of any property which lease may be capitalized on the
consolidated balance sheet of the Company and its Subsidiaries in accordance
with generally accepted accounting principles as in effect from time to time
and, in each such  case, all renewals, extensions,

                                       5

 
refundings, amendments or modifications thereof, except for the Corporation's 
6-3/8% Convertible Subordinated Debentures due 2002; unless, by the terms of the
instrument creating or evidencing the indebtedness it is provided that such
indebtedness is not superior in right of payment to the Securities.

         "Special Record Date" for the payment of any Defaulted Interest means a
date fixed by the Trustee pursuant to Section 307.

         "Stated Maturity", when used with respect to any Security or any
installment of principal thereof or interest thereon, means the date specified
in such Security as the fixed date on which the principal of such Security or
such installment of principal or interest is due and payable.

         "Subsidiary" means a corporation more than 50% of the outstanding
Voting Stock of which is owned, directly or indirectly, by the Company or by one
or more other Subsidiaries, or by the Company and one or more other
Subsidiaries.

         "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument 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 of any series shall mean the Trustee with respect to
Securities of that series.

         "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force
at the date as of which this instrument was executed except as provided in
Section 905; provided, however, that in the event the Trust Indenture Act of
1939 is amended after such date, "Trust Indenture Act" means, to the extent
required by any such amendment, the Trust Indenture Act of 1939 as so amended.

         "U.S. Government Securities" as used in Section 403 means securities
that are (i) direct obligations of the United States of America for the payment
of which its full faith and credit is pledged or (ii) obligations of a Person
controlled or supervised by and acting as an agency or instrumentality of the
United States of America, the timely payment of which is unconditionally
guaranteed as a full faith and credit obligation by the United States of
America, which, in either case under clauses (i) or (ii) are not callable or
redeemable at the option of the issuer thereof, and shall also include a
depository receipt issued by a bank or trust company as custodian with respect
to any such U.S. Government Security or a specific payment of interest on or
principal of any such U.S. Government Security held by such custodian for the
amount of the holder of a depository receipt, provided that (except as required
by law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the U.S. Government Security evidenced by such
depository receipt.

         "Vice President", when used with respect to the Company or the Trustee,
means any vice president, whether or not designated by a number or a word or
words added before or after the title "vice president".

         "Voting Stock" means stock which 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.

6

 
         Section 102.    Compliance Certificates and Opinions.

         Upon any application or request by the Company to the Trustee to take
any action under any provision of this Indenture, the Company shall furnish to
the Trustee such certificates and opinions as may be required under the Trust
Indenture Act.  Each such certificate or opinion shall be given in the form of
an Officers' Certificate, if to be given by an officer of the Company, or an
Opinion of Counsel, if to be given by counsel, and shall comply with the
requirements of the Trust Indenture Act and any other requirements set forth in
this Indenture.

         Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include:

         (1)  a statement that each individual signing such certificate or
     opinion 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 contained in such
     certificate or opinion are based;

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

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

         Section 103.    Form 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 as to other matters, and any such Person may certify
or give an opinion as to such matters in one or several documents.

         Any certificate or opinion of an officer of the Company 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 or opinion or representations
with respect to the matters upon which his 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, an officer or officers of the Company stating that the
information with respect to such factual matters is in the possession of the
Company, unless such counsel knows, or in the exercise of reasonable care should
know, that the certificate or opinion or representations with respect to such
matters 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.

                                       7

 
         Section 104.    Acts of Holders; Record Dates.

         (a)   Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given 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 agent duly
appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required, to the Company.  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 601) conclusive in favor of the Trustee and
the Company, if made in the manner provided in this Section.

         Without limiting the generality of the foregoing, a Holder, including a
Depository that is a Holder of a Book-Entry Security, may make, give or take, by
a proxy, or proxies, duly appointed in writing, any request, demand,
authorization, direction, notice, consent, waiver or other action provided in
this Indenture to be made, given or taken by Holders, and a Depository that is a
Holder of a Book-Entry Security may provide its proxy or proxies to the
beneficial owners of interest in any such Book-Entry Security.

         (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 a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof.  Where
such execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority.  The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be proved
in any other manner which the Trustee deems sufficient.

         (c)   The Company may, in the circumstances permitted by the Trust
Indenture Act, set any day as the record date for the purpose of determining the
Holders of Outstanding Securities of any series entitled to give or take any
request, demand, authorization, direction, notice, consent, waiver or other
action, provided or permitted by this Indenture to be given or taken by Holders
of Securities of such series.

         With regard to any record date set pursuant to this paragraph, the
Holders of Outstanding Securities of the relevant series on such record date (or
their duly appointed agents), and only such Persons, shall be entitled to give
or take relevant action, whether or not such Holders remain Holders after such
record date.  With regard to any action that may be given or taken hereunder
only by Holders of a requisite principal amount of Outstanding Securities of any
series (or their duly appointed agents) and for which a record date is set
pursuant to this paragraph, the Company may, at its option, set an expiration
date after which no such action purported to be given or taken by any Holder
shall be effective hereunder unless given or taken on or prior to such
expiration date by Holders of the requisite principal amount of Outstanding
Securities of such series on such record date (or their duly appointed agents).
On or prior to any expiration date set pursuant to this paragraph, the Company
may, on one or more occasions at its option, extend such date to any later date.
Nothing in this paragraph shall prevent any Holder (or any duly appointed agent
thereof) from giving or taking, at any time, contrary to or different from, any
action given or taken, or purported to have been given or taken, hereunder by a
Holder on or prior to such date, in which event the Company may set a record
date in respect thereof pursuant

                                       8

 
to this paragraph.  Notwithstanding the foregoing or the Trust Indenture Act,
the Company shall not set a record date for, and the provisions of this
paragraph shall not apply with respect to, any action to be given or taken by
Holders pursuant to Section 501, 502 or 512.

         Upon receipt by the Trustee of any notice of default pursuant to
Section 501, any declaration of acceleration, or any rescission and annulment of
any such declaration, pursuant to Section 502 or of any direction with respect
in accordance with Section 512, any notice of default pursuant to Section 501,
with respect to Securities of any series, a record date shall automatically and
without any other action by any Person be set for the purpose of determining the
Holders of Outstanding Securities of such series entitled to join in such notice
of default, declaration, or rescission and annulment or direction of default, as
the case may be, which record date shall be the close of business on the day the
Trustee receives such notice of default, declaration or rescission and annulment
or direction as the case may be.  The Holders of Outstanding Securities of such
series on such record date (or their duly appointed agent), and only such
Persons, shall be entitled to join in such notice of default, declaration, or
rescission and annulment or direction as the case may be, whether or not such
Holders remain Holders after such record date; provided that, unless such notice
of default, declaration, or rescission and annulment, as the case may be, shall
have become effective by virtue of Holders of the requisite principal amount of
Outstanding Securities of such series on such record date (or their duly
appointed agents) having joined therein on or prior to the 90th day after such
record date, such notice of default, declaration, or rescission and annulment or
direction, as the case may be, shall automatically and without any action by any
Person be canceled and of no further effect.  Nothing in this paragraph shall
prevent a Holder (or a duly appointed agent thereof) from giving, before or
after the expiration of such 90-day period, notice of default, a declaration of
acceleration, or a rescission and annulment or direction of any such notice of
default, declaration, contrary to or different from, or, after the expiration of
such period, identical to, a notice of default, declaration or rescission and
annulment or direction, as the case may be, that has been canceled pursuant to
the proviso to the preceding sentence, in which event a new record date in
respect thereof shall be set pursuant to this paragraph.

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

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

         Section 105.    Notices, Etc., to Trustee and Company.

         Any request, demand, authorization, direction, notice, consent, waiver
or 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 or by the Company 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:  One First National
     Plaza, Suite 0126, Chicago, Illinois 60670 for U.S. mail, or One North
     State Street, Ninth Floor, Chicago, Illinois 60602 for deliveries,
     Attention: Corporate Trust Administration, or
                                       9


 
         (2)  the Company by the Trustee or by any Holder shall be sufficient
     for every purpose hereunder (unless otherwise herein expressly provided) if
     in writing and mailed, first-class postage prepaid, to the Company
     addressed to it at the address of its principal office specified in the
     first paragraph of this instrument to the attention of the Treasurer or at
     any other address previously furnished in writing to the Trustee by the
     Company.

         Section 106.    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 his address as it appears in the Security Register, not later
than the latest date (if any), and not earlier than the earliest date (if any),
prescribed for the 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.

         In case by reason of the suspension of regular mail service or by
reason of any other cause it shall be impracticable to give such notice by mail,
then such notification as shall be made with the approval of the Trustee shall
constitute a sufficient notification for every purpose hereunder.

         Section 107.    Conflict with Trust Indenture Act.

         If any provision hereof limits, qualifies or conflicts with a provision
of the Trust Indenture Act that is required under such Act to be a part of and
govern this Indenture, the latter provision shall control.  If any provision of
this Indenture modifies or excludes any provision of the Trust Indenture Act
that may be so modified or excluded, the latter provision shall be deemed to
apply to this Indenture as so modified or to be excluded, as the case may be.

         Section 108.    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.

         Section 109.    Successors and Assigns.

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

         Section 110.    Separability Clause.

         In case 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.

                                      10

 
         Section 111.    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
hereunder, the holders of Senior Indebtedness and the Holders, any benefit or
any legal or equitable right, remedy or claim under this Indenture.

         Section 112.    Governing Law.

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

         Section 113.    Legal Holidays.

         In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security or, if applicable, the last date on which a Holder has
the right to convert its Securities shall not be a Business Day at any Place of
Payment, then (notwithstanding any other provision of this Indenture or of the
Securities (other than a provision of the Securities of any series which
specifically states that such provision shall apply in lieu of this Section))
payment of interest or principal (and premium, if any) or conversion of such
Securities need not be made at such Place of Payment on such date, but may be
made on the next succeeding Business Day at such Place of Payment with the same
force and effect as if made on the Interest Payment Date or Redemption Date, or
at the Stated Maturity, or on the last day for such conversion, provided that no
interest shall accrue for the period from and after such Interest Payment Date,
Redemption Date or Stated Maturity, as the case may be.

         Section 114.    Currency Conversion.

         Except as contemplated by Section 301 or as specifically provided in
Securities of a series, the Company agrees, to the fullest extent that it may
effectively do so under applicable law, that (a) if for the purpose of obtaining
judgment in any court, it is necessary to convert the sum due in respect of the
principal of, or premium or interest, if any, on the Securities of any series
(the "Required Currency") into a currency in which a judgment will be rendered
(the "Judgment Currency"), the rate of exchange used shall be the rate at which
in accordance with normal banking procedures the Trustee could purchase in the
City of New York the Required Currency with the Judgment Currency on the New
York Banking Day preceding that on which final unappealable judgment is given
and (b) its obligations under this Indenture to make payments in the Required
Currency (i) shall not be discharged or satisfied by any tender, or any recovery
pursuant to any judgment (whether or not entered in accordance with subsection
(a)), in any currency other than the Required Currency, except to the extent
that such tender or recovery shall result in the actual receipt, by the payee,
of the full amount of the Required Currency expressed to be payable in respect
of such payments (ii) shall be enforceable as an alternative or additional cause
of action for the purpose of recovering in the Required Currency the amount, if
any, by which such actual receipt shall fall short of the full amount of the
Required Currency so expressed to be payable and (iii) shall not be affected by
judgment being obtained for any other sum due under this Indenture.  For
purposes of the foregoing, "New York Banking Day" means any day except a
Saturday, Sunday or a legal holiday in the City of New York or a day on which
banking institutions in the City of New York are authorized or required by law
or executive order to close.

                                      11

 
                                   ARTICLE II

                                 SECURITY FORMS

         Section 201.    Forms Generally.

         The Securities of each series shall be in substantially the form 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 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. If the form of Securities of
any series is established by action taken pursuant to a Board Resolution, a copy
of an appropriate record of such action shall be certified by the Secretary or
an Assistant Secretary of the Company and delivered to the Trustee at or prior
to the delivery of the Company Order contemplated by Section 303 for the
authentication and delivery of such Securities.

         The definitive Securities shall be printed, lithographed or engraved on
steel engraved borders or may be produced in any other manner, all as determined
by the officers executing such Securities, as evidenced by their execution of
such Securities.

         Section 202.    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 of the series designated therein referred
to in the within mentioned Indenture.

 
                                      THE FIRST NATIONAL BANK
                                        OF CHICAGO, as Trustee


                                      By _____________________________
                                          Authorized Officer

          Section 203.   Form of Legend for Book-Entry Securities.

          Any Book-Entry Security authenticated and delivered hereunder shall
bear a legend in substantially the following form:

          "This Security is a Book-Entry Security within the meaning of the
          Indenture hereinafter referred to and is registered in the name of a
          Depository or a nominee of a Depository.  This Security is
          exchangeable for Securities registered in the name of a Person other
          than the Depository or its nominee only in the limited circumstances
          described in the Indenture, and no transfer of this Security (other
          than a transfer of this Security as a whole by the Depository to a
          nominee of the Depository or by a nominee of the Depository to the
          Depository or another nominee of the Depository) may be registered
          except in such limited circumstances."

                                      12

 
                                 ARTICLE III

                                 THE SECURITIES

          Section 301.   Amount Unlimited; Issuable in Series.

          The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is unlimited.

          The Securities may be issued in one or more series.  There shall be
established in or pursuant to a Board Resolution and, subject to Section 303,
set forth, or determined in the manner provided, in an Officers' Certificate, or
established in one or more indentures supplemental hereto, prior to the issuance
of Securities of any series,

          (1)  the title of the Securities of the series (which shall
     distinguish the Securities of the series from all other Securities and from
     Securities of any other series);

          (2)  any limit upon the aggregate principal amount of the Securities
     of the series which may be authenticated and delivered under this Indenture
     (except for Securities authenticated and delivered upon registration of
     transfer of, or in exchange for, or in lieu of, other Securities of the
     series pursuant to Section 304, 305, 306, 906, 1107 or 1302 and except for
     any Securities which, pursuant to Section 303, are deemed never to have
     been authenticated and delivered hereunder);

          (3)  the Person to whom any interest on a Security of the series shall
     be payable, if other than 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;

          (4)  the date or dates on which the principal of the Securities of the
     series is payable;

          (5)  the rate or rates at which the Securities of the series shall
     bear interest, if any, the date or dates from which such interest shall
     accrue, the Interest Payment Dates on which any such interest shall be
     payable and the Regular Record Date for any interest payable on any
     Interest Payment Date;

          (6)  the place or places where the principal of (and premium, if any)
     and interest on Securities of the series shall be payable;

          (7)  the period or periods within which, the price or prices at which
     and the terms and conditions upon which Securities of the series may be
     redeemed, in whole or in part, at the option of the Company;

          (8)  the obligation, if any, of the Company to redeem or purchase
     Securities of the series pursuant to any sinking fund or analogous
     provisions or at the option of a Holder thereof and the period or periods
     within which, the price or prices at which and the terms and conditions
     upon which Securities of the series shall be redeemed or purchased, in
     whole or in part, pursuant to such obligation;

                                      13

 
          (9)  if other than denominations of $1,000 and any integral multiple
     thereof, the denominations in which Securities of the series shall be
     issuable;

          (10)  the currency, currencies or currency units in which payment of
     the principal of and any premium and interest on any Securities of the
     series shall be payable if other than the currency of the United States of
     America and, if other than as set forth in Section 114, the manner of
     determining the equivalent thereof in the currency of the United States of
     America for purposes of the definition of "Outstanding" in Section 101;

          (11)  if the amount of payments of principal of or any premium or
     interest on any Securities of the series may be determined with reference
     to an index, the manner in which such amounts shall be determined;

          (12)  if the principal of or any premium or interest on any Securities
     of the series is to be payable, at the election of the Company or a Holder
     thereof, in one or more currencies or currency units other than that or
     those in which the Securities are stated to be payable, the  currency,
     currencies or currency units in which payment of the principal of and any
     premium and interest on Securities of such series as to which such election
     is made shall be payable, and the periods within which and the terms and
     conditions upon which such election is to be made;

          (13)  whether the Securities of the series shall be issued in whole or
     in part in the form of one or more Book-Entry Securities and, in such case,
     the Depository or Depositories with respect to such Book-Entry Security or
     Securities and the circumstances under which any such Book-Entry Security
     may be registered for transfer or exchange, or authenticated and delivered,
     in the name of a Person other than such Depository or its nominee, if other
     than as set forth in Section 305;

          (14)  if other than the principal amount thereof, the portion of the
     principal amount of Securities of the series which shall be payable upon
     declaration of acceleration of the Maturity thereof pursuant to Section
     502;

          (15)  the exchange of Securities of the series, at the option of the
     Holders thereof, for other Securities of the same series of the same
     aggregate principal amount or of a different authorized kind or different
     authorized denomination or denominations;

          (16)  whether the Securities will be convertible into or exchangeable
     for Common Stock or any other shares of the capital stock or securities of
     the Company or any other Person and, if so, the terms and conditions upon
     which such conversion will be effected including the initial conversion
     price or rate, the conversion period and other provisions in addition to or
     in lieu of those described herein;

          (17)  any modification, amendment or addition to the covenants of the
     Company set forth in Article VII or Article X of this Indenture with
     respect to the Securities of the series;

          (18)  any Events of Default with respect to Securities of the series,
     if not otherwise set forth herein; and
 

                                      14

 
          (19)  any other terms of the series (which terms shall not be
     inconsistent with the provisions of this Indenture, except as permitted by
     Section 901(5)).

          All Securities of any one series shall be substantially identical
except as to denomination and except as may otherwise be provided in or pursuant
to the Board Resolution referred to above and (subject to Section 303) set
forth, or determined in the manner provided, in the Officers' Certificate
referred to above or in any such indenture supplemental hereto.

          If any of the terms of the series are established by action taken
pursuant to a Board Resolution, a copy of an appropriate record of such action
shall be certified by the Secretary or Assistant Secretary of the Company and
delivered to the Trustee at or prior to the delivery of the Officers'
Certificate setting forth the terms of the series.

          The Securities of each series shall be subordinated in right of
payment to Senior Indebtedness as provided in Article XIV.

          Section 302.   Denominations.

          The Securities of each series shall be issuable in registered form
without coupons in such denominations as shall be specified as contemplated by
Section 301. In the absence of any such provisions with respect to the
Securities of any series, the Securities of such series shall be issuable in
denominations of $1,000 and any integral multiple thereof.

          Section 303.   Execution, Authentication, Delivery and Dating.

          The Securities shall be executed on behalf of the Company by its
Chairman, its President or one of its Vice Presidents, and the Treasurer or an
Assistant Treasurer, under its corporate seal reproduced thereon.  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 Company shall bind the Company,
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 Company may deliver Securities of any series executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities, and the Trustee in accordance
with the Company Order shall authenticate and deliver such Securities.  If the
form or terms of the Securities of the series have been established in or
pursuant to one or more Board Resolutions as permitted by Sections 201 and 301,
in authenticating such Securities, and accepting the additional responsibilities
under this Indenture in relation to such Securities, the Trustee shall be
entitled to receive, and (subject to Section 601) shall be fully protected in
relying upon, an Opinion of Counsel stating,

               (a)  if the form of such Securities has been established by or
          pursuant to Board Resolution as permitted by Section 201, that such
          form has been established in conformity with the provisions of this
          Indenture;

                                      15

 
               (b)  if the terms of such Securities have been established by or
          pursuant to Board Resolution as permitted by Section 301, that such
          terms have been established in conformity with the provisions of this
          Indenture; and

               (c)  that such Securities, when authenticated and delivered by
          the Trustee and issued by the Company in the manner and subject to any
          conditions specified in such Opinion of Counsel, will constitute valid
          and legally binding obligations of the Company enforceable in
          accordance with their terms, subject to bankruptcy, insolvency,
          fraudulent transfer, reorganization, moratorium and other similar laws
          of general applica-bility relating to or affecting creditors' rights
          and to general equity principles.

If such form or terms have been so established, the Trustee shall not be
required to authenticate such Securities if the issue of such Securities
pursuant to this Indenture will affect the Trustee's own rights, duties or
immunities under the Securities and this Indenture or otherwise in a manner
which is not reasonably acceptable to the Trustee.

          Notwithstanding the provisions of Section 301 or this Section 303, if
all Securities of a series are not to be originally issued at one time, it shall
not be necessary to deliver the Officers' Certificate otherwise required
pursuant to Section 301 or the Company Order and Opinion of Counsel otherwise
required pursuant to such preceding paragraph at or prior to the time of
authentication of each Security of such series if such documents are delivered
at or prior to the authentication upon original issuance of the first Security
of such series to be issued.

          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 manual signature, 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 Company, and the Company shall deliver such
Security to the Trustee for cancellation as provided in Section 309 together
with a written statement stating that such Security has never been issued and
sold by the Company, 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 304.   Temporary Securities.

          Pending the preparation of definitive Securities of any series, the
Company may execute, and upon Company Order the Trustee shall authenticate and
deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination,
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 of any series are issued, the Company will
cause definitive Securities of that series to be prepared without unreasonable

                                      16

 
delay.  After the preparation of definitive Securities of such series, the
temporary Securities of such series shall be exchangeable for definitive
Securities of such series upon surrender of the temporary Securities of such
series at the office or agency of the Company in a Place of Payment for that
series, without charge to the Holder.  Upon surrender for cancellation of any
one or more temporary Securities of any series the Company shall execute and the
Trustee shall authenticate and deliver in exchange therefor one or more
definitive Securities of the same series, of any authorized denominations and of
a like aggregate principal amount and tenor.  Until so exchanged the temporary
Securities of any series shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities of such series and tenor.

          Section 305.   Registration, Registration of Transfer and Exchange.

          The Company shall cause to be kept at the Corporate Trust Office of
the Trustee an office or agency to be maintained by the Company in accordance
with Section 1002 a register (the register maintained in such office and in any
other office or agency of the Company in a Place of Payment being herein
sometimes collectively referred to as the "Security Register") in which, subject
to such reasonable regulations as it may prescribe, the Company shall provide
for the registration of Securities and of transfers of Securities.  The Trustee
is hereby appointed "Security Registrar" for the purpose of registering
Securities and transfers of Securities as herein provided.

          Upon surrender for registration of transfer of any Security of any
series at the office or agency in a Place of Payment for that series, the
Company shall execute, and the Trustee shall authenticate and deliver, in the
name of the designated transferee or transferees, one or more new Securities of
the same series, of any authorized denominations and of a like aggregate
principal amount and tenor.

          At the option of the Holder, Securities of any series may be exchanged
for other Securities of the same series, of any authorized denominations and of
a like aggregate principal amount and tenor, upon surrender of the Securities to
be exchanged at such office or agency.  Whenever any Securities are so
surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Securities which the Holder making the exchange is
entitled to receive.

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

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

          No service charge shall be made for any registration of transfer or
exchange of Securities, but the Company may require payment of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any registration of transfer or exchange of Securities, other than
exchanges pursuant to Section 304, 906, 1107 or 1302 not involving any transfer.

                                      17

 
          The Company shall not be required (i) to issue, register the transfer
of or exchange Securities of any series during a period beginning at the opening
of business 15 days before the day of the mailing of a notice of redemption of
Securities of that series selected for redemption under Section 1103 and ending
at the close of business on the day of such mailing, or (ii) to register the
transfer of or exchange any Security so selected for redemption in whole or in
part, except the unredeemed portion of any Security being redeemed in part.

          Notwithstanding the foregoing and except as otherwise specified or
contemplated by Section 301, any Book-Entry Security shall be exchangeable
pursuant to this Section 305 or Sections 304, 906 and 1107 for Securities
registered in the name of, and a transfer of a Book-Entry Security of any series
may be registered to, any Person other than the Depository for such Security or
its nominee only if (i) such Depository notifies the Company that it is
unwilling or unable to continue as Depository for such Book-Entry Security or if
at any time such Depository ceases to be a clearing agency registered under the
Securities Exchange Act of 1934, as amended, (ii) the Company executes and
delivers to the Trustee a Company Order that such Book-Entry Security shall be
so exchangeable and the transfer thereof so registerable or (iii) there shall
have occurred and be continuing an Event of Default with respect to the
Securities of such series.  Upon the occurrence in respect of any Book-Entry
Security of any series of any one or more of the conditions specified in clauses
(i), (ii) or (iii) of the preceding sentence or such other conditions as may be
specified as contemplated by Section 301 for such series, such Book-Entry
Security may be exchanged for Securities registered in the names of, and the
transfer of such Book-Entry Security may be registered to, such Persons
(including Persons other than the Depository with respect to such series and its
nominees) as such Depository shall direct.  Notwithstanding any other provision
of this Indenture, any Security authenticated and delivered upon registration of
transfer of, or in exchange for, or in lieu of, any Book-Entry Security shall
also be a Book-Entry Security and shall bear the legend specified in Section 203
except for any Security which is not a Book-Entry Security authenticated and
delivered in exchange for, or upon registration of transfer of, a Book-Entry
Security pursuant to the preceding sentence.

          Section 306.   Mutilated, Destroyed, Lost and Stolen Securities.

          If any mutilated Security is surrendered to the Trustee, the Company
shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of the same series and of like tenor and principal
amount and bearing a number not contemporaneously outstanding.

          If there shall be delivered to the Company and 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 and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company 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 the same series and of like tenor and principal
amount and bearing a number not contemporaneously outstanding.

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

          Upon the issuance of any new Security under this Section, the Company
may require the payment of a sum sufficient to cover any tax or other

                                      18

 
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 of any series issued pursuant to this Section in
lieu of any destroyed, lost or stolen Security shall constitute an original
additional contractual obligation of the Company, whether or not the destroyed,
lost or stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately with
any and all other Securities of that series duly issued hereunder.

          The provisions of this Section 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 307.   Payment of Interest; Interest Rights Preserved.

          Except as otherwise provided as contemplated by Section 301 with
respect to any series of Securities, interest on any Security which 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.

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

          (1)  The Company may elect to make payment of any Defaulted Interest
     to the Persons in whose names the Securities of such series (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 Company shall notify the
     Trustee in writing of the amount of Defaulted Interest proposed to be paid
     on each Security of such series and the date of the proposed payment, and
     at the same time the Company 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 in this Clause provided.  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 Company of such Special Record Date and, in the name
     and at the expense of the Company, 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 Securities of
     such series at its address as it appears in the Security Register, not less
     than 10 days prior to such Special Record Date.  Notice of the proposed
     payment of such Defaulted Interest and the Special Record Date therefor
     having been so mailed, such Defaulted Interest shall be paid to the Persons
     in whose names the Securities of such series (or their respective
     Predecessor Securities) are registered at the

                                      19

 
     close of business on such Special Record Date and shall no longer be
     payable pursuant to the following Clause (2).

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

          Subject to the foregoing provisions of this Section, each Security
delivered under this Indenture upon registration of 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, which were carried by such other Security.

          In the case of any Security of any series which is converted after any
Regular Record Date and on or prior to the next succeeding Interest Payment Date
(other than any Security of a series whose Maturity is prior to such Interest
Payment Date), interest whose Stated Maturity is on such Interest Payment Date
shall be payable on such Interest Payment Date notwithstanding such conversion,
and such interest (whether or not punctually paid or duly provided for) 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 such Regular Record Date.
Except as otherwise expressly provided in the immediately preceding sentence, in
the case of any Security of any series which is converted, interest whose Stated
Maturity is after the date of conversion of such Security shall not be payable.

          Section 308.   Persons Deemed Owners.

          Prior to due presentment of a Security for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name such Security is registered as the owner of such
Security for the purpose of receiving payment of principal of (and premium, if
any) and (subject to Section 307) any interest on such Security and for all
other purposes whatsoever, whether or not such Security be overdue, and neither
the Company, the Trustee nor any agent of the Company or the Trustee shall be
affected by notice to the contrary.

          Section 309.   Cancellation.

          All Securities surrendered for payment, redemption, registration of
transfer or exchange or conversion or for credit against any sinking fund
payment shall, if surrendered to any Person other than the Trustee, be delivered
to the Trustee and, if not already canceled, shall be promptly canceled by it.
The Company may at any time deliver to the Trustee for cancellation any
Securities previously authenticated and delivered hereunder which the Company
may have acquired in any manner whatsoever, and may deliver to the Trustee (or
to any other Person for delivery to the Trustee) for cancellation any Securities
previously authenticated hereunder which the Company has not issued and sold,
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, except as expressly permitted by this
Indenture.  All canceled Securities held by the Trustee shall be destroyed
unless otherwise directed by a Company Order.

          If the Company shall acquire any of the Securities, such acquisition
shall not operate as a redemption or satisfaction of the

                                      20

 
indebtedness represented by such Securities unless and until the same are
delivered to the Trustee canceled or for cancellation.

          Section 310.   Computation of Interest.

          Except as otherwise specified as contemplated by Section 301 for
Securities of any series, interest on the Securities of each series shall be
computed on the basis of a 360-day year of twelve 30-day months.

                                   ARTICLE IV

                           SATISFACTION AND DISCHARGE

          Section 401.   Satisfaction and Discharge of Indenture.

          This Indenture shall upon Company Request cease to be of further
effect (except as to any surviving rights of conversion, if any, registration of
transfer or exchange of Securities and substitution of mutilated, defaced,
destroyed, lost or stolen Securities herein expressly provided for), and the
Trustee, at the expense of the Company, shall execute proper instruments
acknowledging satisfaction and discharge of this Indenture, when

          (1)  either

               (A)  all Securities theretofore authenticated and delivered
          (other than (i) Securities which have been destroyed, lost or stolen
          and which have been replaced or paid as provided in Section 306 and
          (ii) Securities for whose payment money has theretofore been deposited
          in trust or segregated and held in trust by the Company and thereafter
          repaid to the Company or discharged from such trust, as provided in
          Section 1003) have been delivered to the Trustee canceled or for
          cancellation; or

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

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

          (3)  the Company 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 Company to the Trustee under Section 607 and, if money shall
have been deposited with the Trustee pursuant to subclause (B) of Clause (1) of
this Section, the obligations of the Trustee under Section 402 and the last
paragraph of Section 1003 shall survive.

                                      21

 
          Section 402.   Application of Trust Money.

          Subject to provisions of the last paragraph of Section 1003, all money
deposited with the Trustee pursuant to Section 401 shall be held in trust and
applied by it, in accordance with the provisions of the Securities and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal and any premium and
interest for whose payment such money has been deposited with the Trustee.

          Section 403.   Satisfaction, Discharge and Defeasance of Securities of
                         any Series.

          The Company shall be deemed to have been Discharged from its
obligations with respect to Securities of any series on the ninety-first day
after the applicable conditions set forth below have been satisfied:

          (1)(A)   the Company shall have deposited or caused to be deposited
     irrevocably with the Trustee as trust funds in trust, specifically pledged
     as security for, and dedicated solely to, the benefit of the Holders of the
     Securities of such series (i) money in the currency in which such
     Securities are payable in an amount, or (ii) U.S. Government Securities,
     or, in the case of Securities denominated in a foreign currency, Foreign
     Government Securities, which through the payment of interest and principal
     in respect thereof in accordance with their terms will provide, not later
     than one day before the due date of any payment, money in the currency in
     which such Securities are payable in an amount, or (iii) a combination of
     (i) and (ii), sufficient, in the opinion of a nationally recognized firm of
     independent public accountants expressed in a written certification thereof
     delivered to the Trustee, to pay and discharge each installment of
     principal (including mandatory sinking fund payments) of, and premium (not
     relating to optional redemption), if any, and interest on, the Outstanding
     Securities of such series on the dates such installments of principal of,
     and premium (not relating to optional redemption), if any, or interest are
     due; or

               (B)  the Company has properly fulfilled such other means of
          satisfaction and discharge as is specified to be applicable to the
          Securities of such series;

          (2)  the Company shall have delivered to the Trustee an Opinion of
     Counsel of a nationally recognized firm to the effect that holders of the
     Securities of such series will not recognize income, gain or loss for
     Federal income tax purposes as a result of the Company's exercise of its
     option under this Section 403 and will be subject to Federal income tax on
     the same amount and in the same manner and at the same times as would have
     been the case if such option had not been exercised, or a copy of a ruling
     or other formal statement or action to that effect received from or
     published by the Internal Revenue Service;

          (3)  the Company has paid or caused to be paid all other sums payable
     with respect to the Securities of such series at the time outstanding;

          (4)  the Company has delivered to the Trustee an Opinion of Counsel to
     the effect that the trust resulting from the deposit, defeasance and
     discharge under this Section 403 will not constitute, or is qualified as a
     regulated investment company under the Investment Company Act of 1940;

                                      22


 
          (5) such deposit will not result in a breach or violation of, or
     constitute a default under, this Indenture or any other agreement or
     instrument to which the Company is a party or by which it is bound;

          (6)  no Event of Default or event which, after notice or lapse of time
     or both, would become an Event of Default shall have occurred and be
     continuing on the date of such deposit; and

          (7)  the Company 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, discharge and defeasance of the
     entire indebtedness on all Securities of any such series at the time
     outstanding have been complied with.

          "Discharged" means, for purposes of this Section 403, that the Company
shall be deemed to have paid and discharged the entire indebtedness represented
by, and obligations under, the Securities of such series and to have satisfied
all the obligations under this Indenture relating to the Securities, of such
series (and the Trustee, at the expense of the Company, shall execute proper
instruments acknowledging the same), except (i) rights of registration of
transfer and exchange, and the Company's right of optional redemption, if any,
(ii) substitution of mutilated, defaced, destroyed, lost or stolen Securities,
(iii) rights of holders of Securities to receive from the trust fund described
in Clause (1) above, payments of principal of, and premium (not relating to
optional redemption), if any, and interest on the Securities, and remaining
rights of the holders of Securities to receive mandatory sinking fund payments,
if any, (iv) the rights, obligations and immunities of the Trustee hereunder and
(v) the rights of the Holders of such series as beneficiaries hereof with
respect to the property so deposited with the Trustee payable to all or any of
them.

          Section 404.   Covenant Defeasance of Securities of any Series.

          The Company shall cease to be under any obligation to comply with any
term, provision or condition of any covenant specified as contemplated by
Section 301 with respect to Securities of any series at any time after the
applicable conditions set forth below have been satisfied:

          (1)(A)   the Company shall have deposited or caused to be deposited
     irrevocably with the Trustee as trust funds in trust, specifically pledged
     as security for, an dedicated solely to, the benefit of the Holders of the
     Securities of such series (i) money in the currency in which such
     Securities are payable in an amount, or (ii) U.S. Government Securities or,
     in the case of Securities denominated in a foreign currency, Foreign
     Government Securities, which through the payment of interest and principal
     in respect thereof in accordance with their terms will provide, not later
     than one day before the due date of any payment, money in the currency in
     which such Securities are payable in an amount, or (iii) a combination of
     (i) and (ii), sufficient, in the opinion of a nationally recognized firm of
     independent public accountants expressed in a written certification thereof
     delivered to the Trustee, to pay and discharge each installment of
     principal (including mandatory sinking fund payments) of, and premium (not
     relating to optional redemption), if any, and interest on, the Outstanding
     Securities of such series on the dates such installments of principal of,
     and premium (not relating to optional redemption), if any, or interest are
     due; or

                                       23

 
               (B) the Company has properly fulfilled such other means of
          defeasance as is specified to be applicable to the Securities of such
          series;

          (2)  the Company has paid or caused to be paid all other sums payable
     with respect to the Securities of such series at the time outstanding;

          (3)  such deposit will not result in a breach or violation of, or
     constitute a default under, this Indenture or any other agreement or
     instrument to which the Company is a party or by which it is bound;

          (4)  no Event of Default or event which, after notice or lapse of time
     or both, would become an Event of Default shall have occurred and be
     continuing on the date of such deposit;

          (5)  the Company has delivered to the Trustee an Opinion of Counsel to
     the effect that the trust resulting from the deposit, defeasance and
     discharge under this Section 404 will not constitute, or is qualified as, a
     regulated investment company under the Investment Company Act of 1940; and

          (6)  the Company has delivered to the Trustee an Officer's Certificate
     and an Opinion of Counsel each stating that all conditions precedent herein
     provided for relating to the defeasance of the covenants referred to in
     this Section 404 with respect to Securities of any such series at the time
     outstanding have been complied with.

Notwithstanding the discharge and defeasance of any term, provision or condition
of any term, provision or condition of any covenant specified as contemplated by
Section 301 with respect to Securities of any series at the time outstanding all
other obligations of the Company in this Indenture including, without
limitation, the Company's primary liability for the payment of the principal
(including mandatory sinking fund payments) of, and premium, if any, and
interest on all Securities of such series shall survive until the payment of all
such principal has been made.

          Section 405.   Reinstatement.

          If the Trustee is unable to apply any money, U.S. Government
Securities or Foreign Government Securities in accordance with Section 403 or
404 by reason of any legal proceeding or by reason of any order or judgment of
any court or governmental authority enjoining, restraining or otherwise
prohibiting such application, the Company's obligations under this Indenture and
the Securities shall be revived and reinstated as though no deposit had occurred
pursuant to Section 403 or 404, as the case may be, until such time as the
Trustee is permitted to apply all such money, U.S. Government Securities or
Foreign Government Securities in accordance with Section 403 or 404, as the case
may be.

                                   ARTICLE V

                                    REMEDIES

          Section 501.   Events of Default.

          "Event of Default", wherever used herein, means with respect to any
particular series of Securities any one of the following events (whatever the
reason for such Event of Default and whether it shall be occasioned by the
provisions of Article XIV or otherwise and whether it 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 regulation of any

                                       24

 
administrative or governmental body), unless such event is either inapplicable
to a particular series or it is specifically deleted or modified in or pursuant
to the Board Resolution or supplemental indenture authorizing that series:

          (a)  default in the payment of any installment of interest upon any of
the Securities of that series when the same becomes due and payable, and
continuance of such default for a period of 30 days; or

          (b)  default in the payment of the principal of (or premium, if any,
on) any of the Securities of that series at its Maturity by declaration or
otherwise; or

          (c)  default in the payment of any sinking or purchase fund payment or
analogous obligation when the same becomes due and payable by the terms of the
Securities of such series; or

          (d)  failure on the part of the Company duly to observe or perform any
other of the covenants or agreements on the part of the Company in the
Securities of that series or in this Indenture for a period of 60 days after the
date on which written notice of such failure, requiring the Company to remedy
the same, shall have been given to the Company by the Trustee by registered or
certified mail or to the Company and the Trustee by the Holders of at least 25%
in aggregate principal amount of the Outstanding Securities of such series.

          (e)  the entry of an order for relief against the Company under the
Federal Bankruptcy Act by a court having jurisdiction in the premises or a
decree or order by a court having jurisdiction in the premises adjudging the
Company a bankrupt or insolvent under any other applicable Federal or State law,
or the entry of a decree or order approving as properly filed a petition seeking
reorganization, arrangement, adjustment or composition of or in respect of the
Company under the Federal Bankruptcy Code or any other applicable Federal or
State law, or appointing a receiver, liquidator, assignee, trustee, sequestrator
(or other similar official) of the Company or of any substantial part of its
property, or ordering the winding up or liquidation of its affairs, and the
continuance of any such decree or order unstayed and in effect for a period of
90 consecutive days; or

          (f)  the consent by the Company to the institution of bankruptcy or
insolvency proceedings against it, or the filing by it of a petition or answer
of consent seeking reorganization or relief under the Federal Bankruptcy Code or
any other applicable Federal or State law, or the consent by it to the filing of
any such petition or to the appointment of a receiver, liquidator, assignee,
trustee, sequestrator (or other similar official) of the Company or of any
substantial part of its property, or the making by it of an assignment for the
benefit of creditors, or the admission by it in writing of its inability to pay
its debts generally as they become due, or the taking of corporate action by the
Company in furtherance of any such action; or

          (g)  any other Event of Default provided in the supplemental indenture
under which such series of Securities is issued or in the form of Security for
such series.

          Section 502.   Acceleration of Maturity; Rescission and Annulment.

          If an Event of Default with respect to Securities of any series at the
time Outstanding occurs and is continuing, then in every such case the Trustee
or the Holders of not less than 25% in principal amount of the Outstanding
Securities of that series may declare the principal amount (or, if any of the
Securities of that series are Original Issue Discount Securities,

                                      25

 
such portion of the principal amount of such Securities as may be specified in
the terms of that series) of all of the Securities of that series to be due and
payable immediately, by a notice in writing to the Company (and to the Trustee
if given by Holders), and upon any such declaration such principal amount (or
specified amount) shall become immediately due and payable.

          At any time after such a declaration of acceleration with respect to
Securities of any series 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 provided, the Holders of a majority in principal amount of the
Outstanding Securities of that series, by written notice to the Company and the
Trustee, may rescind and annul such declaration and its consequences if

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

               (A)  all overdue interest on all Securities of that series,

               (B)  the principal of (and premium, if any, on) any Securities of
          that series which have become due otherwise than by such declaration
          of acceleration and any interest thereon at the rate or rates
          prescribed therefor in such Securities,

               (C)  to the extent that payment of such interest is lawful,
          interest upon overdue interest at the rate or rates prescribed
          therefor in such Securities, and

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

     and

          (2)  all Events of Default with respect to Securities of that series,
     other than the non-payment of the principal of Securities of that series
     which have become due solely by such declaration of acceleration, have been
     cured or waived as provided in Section 513.

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

          Section 503.   Collection of Indebtedness and Suits for Enforcement by
                         Trustee.

          The Company covenants that if

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

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

the Company will, upon demand of the Trustee, pay to it, 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) and interest and, to the extent
that payment of such interest shall be legally enforceable, interest on any
overdue principal (and premium, if any) and on any overdue interest, at the rate
or rates prescribed therefor in such Securities, and, in addition

                                      26

 
thereto, such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

          If an Event of Default with respect to Securities of any series 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 of such series 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 504.   Trustee May File Proofs of Claim.

          In case of any judicial proceeding relative to the Company (or any
other obligor upon the Securities), its property or its creditors, the Trustee
shall be entitled and empowered, by intervention in such proceeding or
otherwise, to take any and all actions authorized under the Trust Indenture Act
in order to have claims of the Holders and the Trustee allowed in any such
proceeding.  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; and 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 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 it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 607.

          No provision of this Indenture 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.

          Section 505.   Trustee May Enforce Claims 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, after
provision for the payment of the reasonable compensation, expenses,
disbursements and advances of the Trustee, 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 506.   Application of Money Collected.

          Subject to Article XIV, any money collected by the Trustee pursuant to
this Article 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 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 under Section
     607; and

                                      27

 
          SECOND:  To the payment of the amounts then due and unpaid for
     principal of (and premium, if any) and interest on the Securities in
     respect of which or for the benefit of which such money has been collected,
     ratably, without preference or priority of any kind, according to the
     amounts due and payable on such Securities for principal (and premium, if
     any) and interest, respectively.

          Section 507.   Limitation on Suits.

          No Holder of any Security of any series shall have any right to
institute any proceeding, judicial or otherwise, with respect to this Indenture,
or for the appointment of a receiver or trustee, 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 of that
     series;

          (2)  the Holders of not less than 25% in principal amount of the
     Outstanding Securities of that series 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 principal amount of the Outstanding Securities of that series;

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 of, any provision
of this Indenture to affect, disturb or prejudice the rights of any other of
such Holders, 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 of such
Holders.

          Section 508.   Unconditional Right of Holders to Receive Principal,
                         Premium and Interest.

          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
Section 307) any interest on such Security on the Stated Maturity or Maturities
expressed in such Security (or, in the case of redemption, on the Redemption
Date) and, if such Security is convertible pursuant to Article XIII hereof, to
convert such Security in accordance therewith and to institute suit for the
enforcement of any such payment and such right to convert, and such rights shall
not be impaired without the consent of such Holder.

                                      28

 
          Section 509.   Restoration of Rights and Remedies.

          If the Trustee or any Holder 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 or to such Holder, then and in every such case, subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
be restored severally and respectively to their former positions hereunder and
thereafter all rights and remedies of the Trustee and the Holders shall continue
as though no such proceeding had been instituted.

          Section 510.   Rights and Remedies Cumulative.

          Except as otherwise provided with respect to the replacement or
payment of mutilated, destroyed, lost or stolen Securities in the last paragraph
of Section 306, no right or remedy herein conferred upon or reserved to the
Trustee or to 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 511.   Delay or Omission Not Waiver.

          No delay or omission of the Trustee or of any Holder of any Securities
to exercise any right or remedy accruing upon any Event of Default 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 or by law
to the Trustee or to the Holders may be exercised from time to time, and as
often as may be deemed expedient, by the Trustee or by the Holders, as the case
may be.

          Section 512.   Control by Holders.

          The Holders of a majority in principal amount of the Outstanding
Securities of any series 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 of such series, provided that

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

          (2)  the Trustee may take any other action deemed proper by the
     Trustee which is not inconsistent with such direction.

          Section 513.   Waiver of Past Defaults.

          The Holders of not less than a majority in principal amount of the
Outstanding Securities of any series may on behalf of the Holders of all the
Securities of such series waive any past default hereunder with respect to such
series and its consequences, except a default

          (1)  in the payment of the principal of (or premium, if any) or
     interest on any Security of such series, or

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

                                      29

 
          Upon any such waiver, such default shall cease to exist, and any Event
of Default arising therefrom shall be deemed to have been cured, for every
purpose of this Indenture; but no such waiver shall extend to any subsequent or
other default or impair any right consequent thereon.

          Section 514.   Undertaking for Costs.

          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, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess costs against
any such party litigant, in the manner and to the extent provided in the Trust
Indenture Act; provided that neither this Section nor the Trust Indenture Act
shall be deemed to authorize any court to require such an undertaking or to make
such an assessment in any suit instituted by the Company.

          Section 515.   Waiver of Stay or Extension Laws.

          The Company 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 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 Company (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 601.   Certain Duties and Responsibilities.

          The duties and responsibilities of the Trustee shall be as provided by
the Trust Indenture Act.  Notwithstanding the foregoing, 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 it shall have reasonable
grounds for believing that repayment of such funds or adequate indemnity against
such risk or liability is not reasonably assured to it.  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.

          Section 602.   Notice of Defaults.

          If a default occurs hereunder with respect to Securities of any
series, the Trustee shall give the Holders of Securities of such series notice
of such default as and to the extent provided by the Trust Indenture Act;
                                                                         
provided, however, that in the case of any default of the character specified in
Section 501(d) with respect to Securities of such series, no such notice to
Holders shall be given until at least 30 days after the occurrence thereof.  For
the purpose of this Section, the term "default" means any event which is, or
after notice or lapse of time or both would become, an Event of Default with
respect to Securities of such series.

                                      30

 
          Section 603.   Certain Rights of Trustee.

          Subject to the provisions of Section 601:

               (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, note, other evidence of indebtedness 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 Company mentioned herein
          shall be sufficiently evidenced by a Company Request or Company 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 written 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 which might be
          incurred by it in compliance 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, note, other evidence of indebtedness
          or other paper or document, but the Trustee, in its discretion, may
          make such further inquiry or investigation into such facts or matters
          as it may see fit, and, if the Trustee shall determine to make such
          further inquiry or investigation, it shall be entitled to examine the
          books, records and premises of the Company, personally or by agent or
          attorney;

               (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 with due care by it hereunder; and

                                       31

 
               (h)  the Trustee shall not be liable for any action taken,
          suffered or omitted by it in good faith and believed by it to be
          authorized or within the discretion, rights or powers conferred upon
          it by this Indenture.

          Section 604.   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 Company, and the Trustee or any Authenticating Agent assumes no
responsibility for their correctness.  The Trustee makes no representations as
to the validity or sufficiency of this Indenture or of the Securities.  The
Trustee or any Authenticating Agent shall not be accountable for the use or
application by the Company of Securities or the proceeds thereof.

          Section 605.   May Hold Securities.

          The Trustee, any Authenticating Agent, any Paying Agent, any Security
Registrar or any other agent of the Company, in its individual or any other
capacity, may become the owner or pledgee of Securities and, subject to Sections
608 and 613, may otherwise deal with the Company with the same rights it would
have if it were not Trustee, Authenticating Agent, Paying Agent, Security
Registrar or such other agent.

          Section 606.   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.  The Trustee shall be
under no liability for interest on any money received by it hereunder except as
otherwise agreed with the Company.

          Section 607.   Compensation and Reimbursement.

          The Company agrees

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

          (2)  except as otherwise expressly provided herein, 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

          (3)  to indemnify the Trustee for, and to hold it harmless against,
     any loss, liability or expense incurred without negligence or bad faith on
     its part, arising out of or in connection with the acceptance or
     administration of the trust or trusts 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.

          The obligations of the Company under this Section 607 to compensate
and indemnify the Trustee and to pay or reimburse the Trustee for expenses,
disbursements and advances shall constitute additional indebtedness

                                      32

 
hereunder and shall survive the satisfaction and discharge of this Indenture.
Such additional indebtedness shall be a senior claim on that of the Securities
upon all property and funds held or collected by the Trustee as such, except
funds held in trust for the payment of principal of (and premium, if any) or
interest on particular Securities, and the Securities are hereby subordinated to
each senior claim.

          Section 608.   Disqualification; Conflicting Interests.

          If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture.

          Section 609.   Corporate Trustee Required; Eligibility.

          There shall at all times be a Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such and
has a combined capital and surplus of at least $50,000,000.  If such Person
publishes reports of condition at least annually, pursuant to law or to the
requirements of said supervising or examining authority, then for the purposes
of this Section, the combined capital and surplus of such Person 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, it shall resign immediately
in the manner and with the effect hereinafter specified in this Article.

          Section 610.   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 shall become effective until the
acceptance of appointment by the successor Trustee in accordance with the
applicable requirements of Section 611.

          (b)  The Trustee may resign at any time with respect to the Securities
of one or more series by giving written notice thereof to the Company.  If the
instrument of acceptance by a successor Trustee required by Section 611 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 of such series.

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

          (d)  If at any time:

          (1)  the Trustee shall fail to comply with Section 608 after written
     request therefor by the Company 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 609 and
     shall fail to resign after written request therefor by the Company 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

                                       33

 
     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 Company by a Board Resolution may remove the
Trustee with respect to all Securities, or (ii) subject to Section 514, any
Holder who has been a bona fide Holder of a Security for at least six months
may, on behalf of himself and all others similarly situated, petition any court
of competent jurisdiction for the removal of the Trustee with respect to all
Securities and the appointment of a successor Trustee or Trustees.

          (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 of one or more series, the Company, by a Board
Resolution, shall promptly appoint a successor Trustee or Trustees with respect
to the Securities of that or those series (it being understood that any such
successor Trustee may be appointed with respect to the Securities of one or more
or all of such series and that at any time there shall be only one Trustee with
respect to the Securities of any particular series) and shall comply with the
applicable requirements of Section 611.  If, within one year after such
resignation, removal or incapability, or the occurrence of such vacancy, a
successor Trustee with respect to the Securities of any series shall be
appointed by Act of the Holders of a majority in principal amount of the
Outstanding Securities of such series which has been delivered to the Company
and the retiring Trustee, the successor Trustee so appointed shall, forthwith
upon its acceptance of such appointment in accordance with the applicable
requirements of Section 611, become the successor Trustee with respect to the
Securities of such series and to that extent supersede the successor Trustee
appointed by the Company.  If no successor Trustee with respect to the
Securities of any series shall have been so appointed by the Company or the
Holders and accepted appointment in the manner required by Section 611, any
Holder who has been a bona fide Holder of a Security of such series for at least
six months may, on behalf of himself and all others similarly situated, petition
any court of competent jurisdiction for the appointment of a successor Trustee
with respect to the Securities of such series.

          (f)  The Company shall give notice of each resignation and each
removal of the Trustee with respect to the Securities of any series and each
appointment of a successor Trustee with respect to the Securities of any series
to all Holders of Securities of such series in the manner provided in Section
106.  Each notice shall include the name of the successor Trustee with respect
to the Securities of such series and the address of its Corporate Trust Office.

          Section 611.   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 Company 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 Company 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.

                                       34

 
          (b)  In case of the appointment hereunder of a successor Trustee with
respect to the Securities of one or more (but not all) series, the Company, the
retiring Trustee and each successor Trustee with respect to the Securities of
one or more series 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 of that
or those series to which the appointment of such successor Trustee relates, (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 of that or those series as to which the retiring
Trustee is not retiring shall continue to be vested in the retiring Trustee, and
(3) shall 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, 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 of that or those series to which the appointment of such successor
Trustee relates; but, on request of the Company 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 of that or those series to which the appointment of
such successor Trustee relates.

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

          Section 612.   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 the corporate trust business
of the Trustee, shall be the successor of the Trustee hereunder, provided such
corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto.  In case 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 with the same
effect as if such successor Trustee had itself authenticated such Securities.

                                       35

 
          Section 613.   Preferential Collection of Claims Against Company.

          If and when the Trustee shall be or become a creditor of the Company
(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 Company (or any such other obligor) to the extent applicable.

          Section 614.   Appointment of Authenticating Agent.

          The Trustee may appoint an Authenticating Agent or Agents with respect
to one or more series of Securities which shall be authorized to act on behalf
of the Trustee to authenticate Securities of such series issued upon original
issue and upon exchange, registration of transfer, partial conversion or partial
redemption thereof or pursuant to Section 306, 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 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 and a certificate of authentication
executed on behalf of the Trustee by an Authenticating Agent.  Each
Authenticating Agent shall be acceptable to the Company and shall at all times
be a corporation organized and doing business under the laws of the United
States of America, any State 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 or State authority.  If such Authenticating Agent publishes reports
of condition at least annually, pursuant to law or to the requirements of said
supervising or examining authority, then for the purposes of this Section, 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, such
Authenticating Agent shall resign immediately in the manner and with the effect
specified in this Section.

          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 the corporate agency or
corporate trust business of an Authenticating Agent, shall continue to be an
Authenticating Agent, provided such corporation shall be otherwise eligible
under this Section, 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 Company.  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 Company.  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, the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company and shall mail written notice of
such appointment by first-class mail, postage prepaid, to all Holders of
Securities of the series with respect to which such Authenticating Agent will
serve, as their names and addresses appear in the Security Register.  Any
successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all the rights, powers and duties of its predecessor
hereunder, with like effect as if originally named as an Authenticating Agent.

                                      36

 
No successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section.

          The Company agrees to pay to each Authenticating Agent from time to
time reasonable compensation for its services under this Section.

          If an appointment with respect to one or more series is made pursuant
to this Section, the Securities of such series may have endorsed thereon, in
addition to the Trustee's certificate of authentication, an alternate
certificate of authentication in the following form:

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

 
                                    THE FIRST NATIONAL BANK
                                      OF CHICAGO, as Trustee


                                    By _______________________________
                                           As Authenticating Agent

                                    By _______________________________
                                           Authorized Officer


                                  ARTICLE VII

               HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

          Section 701.   Company to Furnish Trustee Names and Addresses of
                         Holders.

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

               (a)  semi-annually, not more than 15 days after January 1 and
          July 1 in each year in such form as the Trustee may reasonably
          require, a list for each series of Securities of the names and
          addresses of the Holders of Securities of such series as of such date;
          and

               (b)  at such other times as the Trustee may request in writing,
          within 30 days after the receipt by the Company 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;

excluding from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.

          Section 702.   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 701 and the names and
addresses of Holders received by the Trustee in its capacity as Security
Registrar.  The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.

                                       37


 
          (b)  The rights of the 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 by the
Trust Indenture Act.

          (c)  Every Holder of Securities, by receiving and holding the same,
agrees with the Company and the Trustee that neither the Company nor the Trustee
nor any agent of either of them shall be held accountable by reason of any
disclosure of information as to names and addresses of Holders made pursuant to
the Trust Indenture Act and that the Trustee shall not be held accountable by
reason of mailing any material pursuant to a request made under the Trust
Indenture Act.

          Section 703.   Reports by Trustee.

          (a)  Within 60 days after the 15th day of February of each year
commencing with the later of February 15, 1995, or the first February 15th after
the first issuance of Securities, 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)  A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which any Securities are listed, with the Commission and with the Company.  The
Company will notify the Trustee when any Securities are listed on any stock
exchange.

          Section 704.   Reports by Company.

          The Company shall file with the Trustee and the Commission, and
transmit to 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 pursuant to such Act; provided that any such
information, documents or reports required to be filed with the Commission
pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 shall be
filed with the Trustee within 15 days after the same is so required to be filed
with the Commission.

                                  ARTICLE VIII

              CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR LEASE

          Section 801.   Company May Consolidate, Etc., Only on Certain Terms.

          The Company shall not consolidate with or merge into any other
corporation or convey, transfer or lease its properties and assets substantially
as an entirety to any Person unless:

          (1)  the corporation formed by such consolidation or into which the
     Company is merged or the Person which acquires by conveyance or transfer,
     or which leases, the properties and assets of the Company substantially as
     an entirety shall be a corporation organized and existing under the laws of
     the United States of America, 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 any covenant of the Indenture
     on the part of the Company to be

                                      38

 
     performed or observed and shall have provided for conversion rights, if
     any, in accordance with Section 1311;

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

          (3)  the Company has delivered to the Trustee an Officers' Certificate
     and an Opinion of Counsel, each stating that such consolidation, merger,
     conveyance, transfer or lease and such supplemental indenture complys with
     this Article and that all conditions precedent herein provided for relating
     to such transaction have been complied with.

          Section 802.   Successor Substituted.

          Upon any consolidation by the Company with or merger of the Company
into, any other Person or any conveyance, transfer or lease of the properties
and assets of the Company substantially as an entirety in accordance with
Section 801, the successor Person formed by such consolidation or into which the
Company 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 Company under this Indenture with the same effect as if such successor
Person had been named as the Company herein, and thereafter, except in the case
of a lease, the predecessor Person shall be relieved of all obligations and
covenants under this Indenture and the Securities.

                                   ARTICLE IX

                            SUPPLEMENTAL INDENTURES

          Section 901.   Supplemental Indentures Without Consent of Holders.

          Without the consent of any Holders, the Company, 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 Company and
     the assumption by any such successor of the covenants of the Company herein
     and in the Securities; or

          (2)  to add to the covenants of the Company for the benefit of the
     Holders of all or any series of Securities (and if such covenants are to be
     for the benefit of less than all series of Securities, stating that such
     covenants are expressly being included solely for the benefit of such
     series) or to surrender any right or power herein conferred upon the
     Company; or

          (3)  to add any additional Events of Default in respect of the
     Securities of any specific series or all series; or

          (4)  to add to or change any of the provisions of this Indenture to
     such extent as shall be necessary to permit or facilitate the issuance of
     Securities in bearer form, registrable or not registrable as to principal,
     and with or without interest coupons, or if permitted by law, to provide
     for the exchangeability of such Securities of the same series in fully
     registered form, or to permit or facilitate the issuance of Securities in
     uncertificated form; or

                                       39

 
          (5)  to change or eliminate any of the provisions of this Indenture in
     respect of one or more series of Securities, provided that any such
     addition, change or elimination (i) shall neither (A) apply to any Security
     of any series created prior to the execution of such supplemental indenture
     and entitled to the benefit of such provision nor (B) modify the rights of
     the Holder of any such Security with respect to such provision or (ii)
     shall become effective only when there is no such Security Outstanding; or

          (6)  to secure the Securities; or

          (7)  to establish the form or terms of Securities of any series as
     permitted by Sections 201 and 301; or

          (8)  to make provision with respect to the conversion rights, if any,
     of Holders of Securities of any series which are convertible in accordance
     with Article XIII pursuant to the requirements of Section 1311; or

          (9)  to evidence and provide for the acceptance of appointment
     hereunder by a successor Trustee with respect to the Securities of one or
     more series 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 611(b); or

          (10)  to cure any ambiguity, to correct or supplement any provision
     herein which 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 (9) shall not adversely affect the interests of the Holders
     of Securities of any series in any material respect.

          Section 902.   Supplemental Indentures with Consent of Holders.

          With the consent of the Holders of not less than a majority in
principal amount of the Outstanding Securities of each series affected by such
supplemental indenture, by Act of said Holders delivered to the Company and the
Trustee, the Company, 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 of such series 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 principal of or 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 reduce the amount of the principal
     of an Original Issue Discount Security that would be due and payable upon a
     declaration of acceleration of the Maturity thereof pursuant to Section
     502, or change any Place of Payment where, or the coin or currency in
     which, any Security or any premium or the 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,

                                       40

 
     if the Securities of any series are convertible in accordance with Article
     XIII, adversely affect the right to convert such Securities as provided
     therein (except as permitted by Section 901(8)), or

          (2)  modify the provisions of this Indenture with respect to the
     subordination of the Securities in a manner adverse to the Holders, or

          (3)  reduce the percentage in principal amount of the Outstanding
     Securities of any series, 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

          (4)  modify any of the provisions of this Section, Section 513 or
     Section 1006 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 Outstanding Security affected
     thereby, provided, however, that this clause shall not be deemed to require
     the consent of any Holder with respect to changes in the references to "the
     Trustee" and concomitant changes in this Section and Section 1006, or the
     deletion of this proviso, in accordance with the requirements of Sections
     611(b) and 901(8).

A supplemental indenture which changes or eliminates any covenant or other
provision of this Indenture which has expressly been included solely for the
benefit of one or more particular series of Securities, or which modifies the
rights of the Holders of Securities of such series with respect to such covenant
or other provision, shall be deemed not to affect the rights under this
Indenture of the Holders of Securities of any other series.

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

          Section 903.   Execution of Supplemental Indentures.

          In executing, or accepting the additional trusts created by, any
supplemental indenture permitted by this Article or the modifications thereby of
the trusts created by this Indenture, the Trustee shall be entitled to receive,
and (subject to Section 601) shall be fully protected in relying upon, an
Opinion of Counsel stating that the execution of such supplemental indenture is
authorized or permitted by this Indenture.  The Trustee may, but shall not be
obligated to, enter into any such supplemental indenture which affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.

          Section 904.   Effect of Supplemental Indentures.

          Upon the execution of any supplemental indenture under this Article,
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 to the extent provided therein.

                                       41

 
          Section 905.   Conformity with Trust Indenture Act.

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

          Section 906.   Reference in Securities to Supplemental Indentures.

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

                                   ARTICLE X

                                   COVENANTS

          Section 1001.  Payment of Principal, Premium and Interest.

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

          Section 1002.  Maintenance of Office or Agency.

          The Company will maintain in each Place of Payment for any series of
Securities an office or agency where Securities of that series may be presented
or surrendered for payment, where Securities of that series may be surrendered
for registration of transfer or exchange, and, if applicable, where Securities
of each series that is convertible pursuant to Article XIII may be surrendered
for conversion and where notices and demands to or upon the Company in respect
of the Securities of that series and this Indenture may be served.  The Company
will give prompt written notice to the Trustee of the location, and any change
in the location, of such office or agency.  If at any time the Company shall
fail to maintain any such required 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 Company hereby appoints the Trustee as its agent to receive all such
presentations, surrenders, notices and demands.

          The Company may also from time to time designate one or more other
offices or agencies where the Securities of one or more series may be presented
or surrendered for any or all 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 Company of its obligation to maintain an office
or agency in each Place of Payment for Securities of any series for such
purposes.  The Company will give prompt written notice to the Trustee of any
such designation or rescission and of any change in the location of any such
other office or agency.

                                       42

 
          Section 1003.  Money for Securities Payments to Be Held in Trust.

          If the Company shall at any time act as its own Paying Agent with
respect to any series of Securities, it will, on or before each due date of the
principal of (and premium, if any) or interest on any of the Securities of that
series, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay the principal (and premium, if any) and 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
action or failure so to act.

          Whenever the Company shall have one or more Paying Agents for any
series of Securities, it will, not later than the opening of business at each
Place of Payment for such series of Securities on each due date of the principal
of or any premium or interest on any Securities of that series, deposit with a
Paying Agent a sum sufficient to pay such amount, such sum to be held as
provided by the Trust Indenture Act, and (unless such Paying Agent is the
Trustee) the Company will promptly notify the Trustee of its action or failure
so to act.

          The Company will cause each Paying Agent for any series of Securities
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, that such Paying Agent will (i) comply with the provisions of
the Trust Indenture Act applicable to it as a Paying Agent and (ii) during the
continuance of any default by the Company (or any other obligor upon the
Securities of that series) in the making of any payment in respect of the
Securities of that series, and upon the written request of the Trustee,
forthwith pay to the Trustee all sums held in trust by such Paying Agent for
payment in respect of the Securities of that series.

          The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company 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 Company 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 Company, in trust for the payment of the principal of (and premium, if
any) or interest on any Security of any series and remaining unclaimed for two
years after such principal (and premium, if any), or interest has become due and
payable shall be paid to the Company on Company Request, or (if then held by the
Company) shall be discharged from such trust; and the Holder of such Security
shall thereafter, as an unsecured general creditor, look only to the Company for
payment thereof, and all liability of the Trustee or such Paying Agent with
respect to such trust money, and all liability of the Company as trustee
thereof, shall thereupon cease.

          Section 1004.  Statement by Officers as to Default.

          The Company will deliver to the Trustee, within 120 days after the end
of each fiscal year of the Company ending after the date hereof, a brief
certificate from the principal executive officer, principal financial officer or
principal accounting officer stating whether or not to the best knowledge of the
signers thereof the Company is in default in the performance and observance of
any of the terms, provisions and conditions of this Indenture (without regard to
any period of grace or requirement of notice provided

                                       43

 
hereunder) and, if the Company shall be in default, specifying all such defaults
and the nature and status thereof of which they may have knowledge.

          Section 1005.  Existence.

          Subject to Article VIII, the Company will do or cause to be done all
things necessary to preserve and keep in full force and effect its corporate
existence, rights (charter and statutory) and franchises; provided, however,
that the Company shall not be required to preserve any such right or franchise
if the Company shall determine that the preservation thereof is no longer
desirable in the conduct of the business of the Company and that the loss
thereof is not disadvantageous in any material respect to the Holders.

          Section 1006.  Waiver of Certain Covenants.

          The Company may omit in any particular instance to comply with any
term, provision or condition of any covenant provided with respect to Securities
of any series as specified as contemplated by Section 301 (unless otherwise
provided by the terms of such series), if before the time for such compliance
the Holders of at least a majority in principal amount of the Outstanding
Securities of such series shall, by Act of such Holders, either waive such
compliance in such instance or generally waive compliance with such term,
provision or condition, but no such waiver shall extend to or affect such term,
provision or condition except to the extent so expressly waived, and, until such
waiver shall become effective, the obligations of the Company and the duties of
the Trustee in respect of any such term, provision or condition shall remain in
full force and effect.

                                   ARTICLE XI

                            REDEMPTION OF SECURITIES

          Section 1101.  Applicability of Article.

          Securities of any series which are redeemable before their Stated
Maturity shall be redeemable in accordance with their terms and (except as
otherwise specified as contemplated by Section 301 for Securities of any series)
in accordance with this Article.

          Section 1102.  Election to Redeem; Notice to Trustee.

          The election of the Company to redeem any Securities shall be
evidenced by a Board Resolution.  In case of any redemption at the election of
the Company of less than all the Securities of any series, the Company shall, at
least 60 days prior to the Redemption Date fixed by the Company (unless a
shorter notice shall be satisfactory to the Trustee), notify the Trustee of such
Redemption Date, of the principal amount of Securities of such series to be
redeemed and, if applicable, of the tenor of the Securities to be redeemed.  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 or
elsewhere in this Indenture, the Company shall furnish the Trustee with an
Officers' Certificate evidencing compliance with such restriction.

          Section 1103.  Selection by Trustee of Securities to Be Redeemed.

          If less than all the Securities of any series are to be redeemed
(unless all of the Securities of such series and of a specified tenor 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 of such series not previously called for redemption, by such method
as the Trustee shall deem fair and appropriate and which may

                                       44

 
provide for the selection for redemption of portions (equal to the minimum
authorized denomination for Securities of that series or any integral multiple
thereof) of the principal amount of Securities of such series of a denomination
larger than the minimum authorized denomination for Securities of that series.
If less than all of the Securities of such series and of a specified tenor 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 of such series and specified tenor not previously called
for redemption in accordance with the preceding sentence.

          If any Security of any series selected for partial redemption which is
convertible in accordance with Article XIII is converted in part before
termination of the conversion right with respect to the portion of the Security
of that series so selected, the converted portion of such Security shall be
deemed (so far as may be) to be the portion selected for redemption.  Securities
of any series which is convertible in accordance with Article XIII which have
been converted during a selection of Securities of a series to be redeemed shall
be treated by the Trustee as Outstanding for the purpose of such selection.

          The Trustee shall promptly notify the Company in writing of the
Securities selected for redemption and, in the case of any Securities selected
for partial redemption, 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 Securities redeemed or to be redeemed only in part, to the
portion of the principal amount of such Securities which has been or is to be
redeemed.

          Section 1104.  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 his address appearing in
the Security Register.

          All notices of redemption shall state:

          (1)  the Redemption Date,

          (2)  the Redemption Price,

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

          (4)  that on the Redemption Date the Redemption Price will become due
     and payable upon each such Security to be redeemed and, if applicable, that
     interest thereon will cease to accrue on and after said date,

          (5)  if applicable, the conversion price, the date on which the right
     to convert the principal of the Securities to be redeemed will terminate
     and the place or places where such Securities may be surrendered for
     conversion,

          (6)  the place or places where such Securities are to be surrendered
     for payment of the Redemption Price, and

                                       45

 
          (7)  that the redemption is for a sinking fund, if such is the case.

          Notice of redemption of Securities to be redeemed at the election of
the Company shall be given by the Company or, at the Company's request, by the
Trustee in the name and at the expense of the Company.

          Section 1105.  Deposit of Redemption Price.

          Not later than the opening of business at each Place of Payment on any
Redemption Date for such series of Securities, the Company shall deposit with
the Trustee or with a Paying Agent (or, if the Company is acting as its own
Paying Agent, segregate and hold in trust as provided in Section 1003) an amount
of money sufficient to pay the Redemption Price of, and (except if the
Redemption Date shall be an Interest Payment Date) accrued interest on, all the
Securities which are to be redeemed on that date other than any Securities
called for redemption on that date which have been converted prior to the date
of such deposit.

          If any Security called for redemption is converted, any money
deposited with the Trustee or with any Paying Agent or so segregated and held in
trust for the redemption of such Security shall (subject to any right of the
Holder of such Security or any Predecessor Security to receive interest as
provided in the last paragraph of Section 307) be paid to the Company upon
Company Request or, if then held by the Company, shall be discharged from such
trust.

          Section 1106.  Securities Payable on Redemption Date.

          Notice of redemption having been given as aforesaid, the Securities so
to be redeemed shall, on the Redemption Date, become due and payable at the
Redemption Price therein specified, and from and after such date (unless the
Company shall default in the payment of the Redemption Price and accrued
interest) such Securities shall cease to bear interest.  Upon surrender of any
such Security for redemption in accordance with said notice, such Security shall
be paid by the Company at the Redemption Price, together with accrued interest
to the Redemption Date; provided, however, that, unless otherwise specified as
contemplated by Section 301, installments of interest whose Stated Maturity is
on or prior to the Redemption Date shall 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 307.

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

          Section 1107.  Securities Redeemed in Part.

          Any Security which is to be redeemed only in part shall be surrendered
at a Place of Payment therefor (with, if the Company or the Trustee so requires,
due endorsement by, or a written instrument of transfer in form satisfactory to
the Company and the Trustee duly executed by, the Holder thereof or his attorney
duly authorized in writing), and the Company shall execute, and the Trustee
shall authenticate and deliver to the Holder of such Security without service
charge, a new Security or Securities of the same series and of like tenor, of
any authorized denomination as requested by such Holder, in aggregate principal
amount equal to and in exchange for the unredeemed portion of the principal of
the Security so surrendered.

                                       46

 
                                 ARTICLE XII

                                 SINKING FUNDS

          Section 1201.  Applicability of Article.

          The provisions of this Article shall be applicable to any sinking fund
for the retirement of Securities of a series except as otherwise specified as
contemplated by Section 301 for Securities of such series.

          The minimum amount of any sinking fund payment provided for by the
terms of Securities of any series is herein referred to as a "mandatory sinking
fund payment", and any payment in excess of such minimum amount provided for by
the terms of Securities of any series is herein referred to  as an "optional
sinking fund payment".  If provided for by the terms of Securities of any
series, the cash amount of any sinking fund payment may be subject to reduction
as provided in Section 1202.  Each sinking fund payment shall be applied to the
redemption of Securities of any series as provided for by the terms of
Securities of such series.

          Section 1202.  Satisfaction of Sinking Fund Payments with Securities.

          The Company (1) may deliver Outstanding Securities of a series (other
than any previously called for redemption) and (2) may apply as a credit
Securities of a series which have been converted pursuant to Article XIII or
which have been redeemed either at the election of the Company pursuant to the
terms of such Securities or through the application of permitted optional
sinking fund payments pursuant to the terms of such Securities, in each case in
satisfaction of all or any part of any sinking fund payment with respect to the
Securities of such series required to be made pursuant to the terms of such
Securities as provided for by the terms of such series; provided that such
Securities have not been previously so credited.  Such Securities shall  be
received and credited for such purpose by the Trustee at the Redemption Price
specified in such Securities for redemption through operation of the sinking
fund and the amount of such sinking fund payment shall be reduced accordingly.

          Section 1203.  Redemption of Securities for Sinking Fund.

          Not less than 60 days prior to each sinking fund payment date for any
series of Securities, the Company will deliver to the Trustee an Officers'
Certificate specifying the amount of the next ensuing sinking fund payment for
that series pursuant to the terms of that series, the portion thereof, if any,
which is to be satisfied by payment of cash and the portion thereof, if any,
which is to be satisfied by delivering and crediting Securities of that series
pursuant to Section 1202 and will also deliver to the Trustee any Securities to
be so delivered.  Not less than 45 days before each such sinking fund payment
date the Trustee shall select the Securities to be redeemed upon such sinking
fund payment date in the manner specified in Section 1103 and cause notice of
the redemption thereof to be given in the name of and at the expense of the
Company in the manner provided in Section 1104.  Such notice having been duly
given, the redemption of such Securities shall be made upon the terms and in the
manner stated in Sections 1106 and 1107.

                                       47

 
                                 ARTICLE XIII

                            CONVERSION OF SECURITIES

          Section 1301.  Applicability; Conversion Privilege and Conversion
                         Price.

          Securities of any series which are convertible into Common Stock of
the Company shall be convertible in accordance with their terms and (except as
otherwise specified as contemplated by Section 301 for Securities of any series)
in accordance with this Article.

          Subject to and upon compliance with the provisions of this Article, at
the option of the Holder thereof, any Security of any series or any portion of
the principal amount thereof which is $1,000 or an integral multiple of $1,000
may be converted at the principal amount thereof, or of such portion thereof,
into fully paid and nonassessable shares (calculated as to each conversion to
the nearest one-hundredth of a share) of Common Stock of the Company, at the
Conversion Price, determined as hereinafter provided, in effect at the time of
conversion.  Such conversion right shall expire at the close of business on the
date specified for Securities of such series.  In case a Security or portion
thereof is called for redemption, such conversion right in respect of the
Security or portions so called shall expire at the close of business on the
Redemption Date, unless the Company defaults in making the payment due upon
redemption.

          The price at which shares of Common Stock shall be delivered upon
conversion (herein called the "Conversion Price") shall be the price specified
in relation to Securities of such series pursuant to Section 301.  The
Conversion Price shall be adjusted in certain instances as provided in
paragraphs (1), (2), (3), (4) and (7) of Section 1304.

          Section 1302.  Exercise of Conversion Privilege.

          In order to exercise the conversion privilege, the Holder of any
Security to be converted shall surrender such Security, together with the
conversion notice duly executed, at any office or agency of the Company
maintained for that purpose pursuant to Section 1002, accompanied by written
notice to the Company at such office or agency that the Holder elects to convert
such Security or, if less than the entire principal amount thereof is to be
converted, the portion thereof to be converted.  Securities or portions thereof
surrendered for conversion during the period from the close of business on any
Regular Record Date next preceding any Interest Payment Date to the opening of
business on such Interest Payment Date shall (unless such Securities or portions
thereof have been called for redemption on a Redemption Date within such period)
be accompanied by payment to the Company or its order, in New York Clearing
House funds or other funds acceptable to the Company, of an amount equal to the
interest payable on such Interest Payment Date on the principal amount of
Securities or portions thereof being surrendered for conversion.  No payment or
adjustment shall be made upon any conversion on account of any interest accrued
on the Securities surrendered for conversion or, except as provided in Section
1304, on account of any dividends on the Common Stock issued upon conversion.

          Securities shall be deemed to have been converted immediately prior to
the close of business on the day of surrender of such Securities for conversion
in accordance with the foregoing provisions, and at such time the rights of the
Holders of such Securities as Holders shall cease, and the Person or Persons
entitled to receive the Common Stock issuable upon conversion shall be treated
for all purposes as the record holder or holders of such Common Stock at such
time.  As promptly as practicable on or after the conversion date, the Company
shall issue and shall deliver at such office or

                                       48

 
agency a certificate or certificates for the number of full shares of Common
Stock issuable upon conversion, together with payment in lieu of any fraction of
a share, as provided in Section 1303.

          In the case of any Security which is converted in part only, upon such
conversion the Company shall execute and the Trustee shall authenticate and
deliver to the Holder thereof, at the expense of the Company, a new Security or
Securities of authorized denominations in aggregate principal amount equal to
the unconverted portion of the principal amount of such Security.

          Section 1303.  Fractions of Shares.

          No fractional shares of Common Stock shall be issued upon conversion
of Securities.  If more than one Security shall be surrendered for conversion at
one time by the same Holder, the number of full shares which shall be issuable
upon conversion thereof shall be computed on the basis of the aggregate
principal amount of the Securities (or specified portions thereof) so
surrendered.  Instead of any fractional share of Common Stock which would
otherwise be issuable upon conversion of any Security or Securities (or
specified portions thereof), the Company shall pay a cash adjustment in respect
of such fractions in an amount equal to the same fraction of the market price
(determined as provided in the last sentence of paragraph (6) of Section 1304)
at the close of business on the day of conversion.


          Section 1304.  Adjustment of Conversion Price.

          (1)  In case the Company shall pay or make a dividend or other
     distribution on any class of capital stock of the Company in Common Stock,
     the Conversion Price in effect at the opening of business on the day
     following the date fixed for the determination of stockholders entitled to
     receive such dividend or other distribution shall be reduced by multiplying
     such Conversion Price by a fraction of which the numerator shall be the
     number of shares of Common Stock outstanding at the close of business on
     the date fixed for such determination and the denominator shall be the sum
     of such number of shares and the total number of shares constituting such
     dividend or other distribution, such reduction to become effective
     immediately after the opening of business on the day following the date
     fixed for such determination.  For the purposes of this paragraph (1), the
     number of shares of Common Stock at any time outstanding shall not include
     shares held in the treasury of the Company but shall include shares
     issuable in respect of scrip certificates issued in lieu of fractions of
     shares of Common Stock.  The Company will not pay any dividend or make any
     distribution on shares of Common Stock held in the treasury of the Company.

          (2)  In case the Company shall issue rights or warrants to all holders
     of its Common Stock entitling them to subscribe for or purchase shares of
     Common Stock at a price per share less than the current market price per
     share(determined as provided in paragraph (6) of this Section) of the
     Common Stock on the date fixed for the determination of stockholders
     entitled to receive such rights or warrants, the Conversion Price in effect
     at the opening of business on the day following the date fixed for such
     determination shall be reduced by multiplying such Conversion Price by a
     fraction of which the numerator shall be the number of shares of Common
     Stock outstanding at the close of business on the date fixed for such
     determination plus the number of shares of

                                       49

 
     Common Stock which the aggregate of the offering price of the total number
     of shares of Common Stock so offered for subscription or purchase would
     purchase at such market price and the denominator shall be the number of
     shares of Common Stock outstanding at the close of business on the date
     fixed for such determination plus the number of shares of Common Stock so
     offered for subscription or purchase, such reduction to become effective
     immediately after the opening of business on the day following the date
     fixed for such determination.  For the purposes of this paragraph (2), the
     number of shares of Common Stock at any time outstanding shall not include
     shares held in the treasury of the Company but shall include shares
     issuable in respect of such certificates issued in lieu of fractions of
     shares of Common Stock.  The Company will not issue any rights or warrants
     in respect of shares of Common Stock held in the treasury of the Company.

          (3)  In case outstanding shares of Common Stock shall be subdivided
     into a greater number of shares of Common Stock, the Conversion Price in
     effect at the opening of business on the day following the day upon which
     such subdivision becomes effective shall be proportionately reduced, and,
     conversely, in case outstanding shares of Common Stock shall each be
     combined into a smaller number of shares of Common Stock, the Conversion
     Price in effect at the opening of business on the day following the day
     upon which such combination becomes effective shall be proportionately
     increased, such reduction or increase, as the case may be, to become
     effective immediately after the opening of business on the day following
     the day upon which such subdivision or combination become effective.

          (4)  In case the Company shall, by dividend or otherwise, distribute
     to all holders of its Common Stock evidences of its indebtedness or assets
     (including securities, but excluding any rights or warrants referred to in
     paragraph (2) of this Section, any dividend or distribution paid in cash
     out of the retained earnings of the Company and any dividend or
     distribution referred to in paragraph (1) of this Section), the Conversion
     Price shall be adjusted so that the same shall equal the price determined
     by multiplying the Conversion Price in effect immediately prior to the
     close of business on the date fixed for the determination of stockholders
     entitled to receive such distribution by a fraction of which the numerator
     shall be the current market price per share (determined as provided in
     paragraph (6) of this Section) of the Common Stock on the date fixed for
     such determination, reduced by the then fair market value (as determined by
     the Board of Directors, whose determination shall be conclusive and
     described in a Board Resolution filed with the Trustee) of the portion of
     the assets or evidences of indebtedness so distributed applicable to one
     share of Common Stock and the denominator shall be such market price per
     share of the Common Stock, such adjustment to become effective immediately
     prior to the opening of business on the day following the date fixed for
     the determination of stockholders entitled to receive such distribution.

          (5)  The reclassification of Common Stock into securities including
     other than Common Stock (other than any reclassification upon a
     consolidation or merger to which Section 1311 applies) shall be deemed to
     involve (a) a distribution of such securities other than Common Stock to
     all holders of Common Stock (and the effective date of such
     reclassification shall be deemed to be "the date fixed for the
     determination of stockholders entitled to

                                       50

 
     receive such distribution" and "the date fixed for such determination")
     within the meaning of paragraph (4) of this Section, and (b) a subdivision
     or combination, as the case may be, of the number of shares of Common Stock
     outstanding immediately prior to such reclassification into the number of
     shares of Common Stock outstanding immediately thereafter (and the
     effective date of such reclassification shall be deemed to be "the day upon
     which such subdivision becomes effective" or "the day upon which such
     combination becomes effective", as the case may be, and "the day upon which
     such subdivision or combination becomes effective" within the meaning of
     paragraph (3) of this Section).

          (6)  For the purpose of any computation under paragraph (2) and (4) of
     this Section, the current market price per share on any date shall be
     deemed to be the average of the daily closing prices for the ten
     consecutive Business Days selected by the Company commencing not less than
     30 nor more than 45 Business Days before the day in question.  The closing
     price for each day shall be the last reported sales price regular way on
     the composite tape or, in case no such reported sale takes place on such
     day, the average of the reported closing bid and asked prices regular way,
     in either case on the New York Stock Exchange or, if the Common Stock is
     not listed or admitted to trading on such Exchange, on the principal
     national securities exchange on which the Common Stock is listed or
     admitted to trading or, if not listed or admitted to trading on any
     national securities exchange, the average of the closing bid and asked
     prices as furnished by any New York Exchange member firm selected from time
     to time by the Company for that purpose.

          (7)  No adjustment in the Conversion Price shall be required unless
     such adjustment would require an increase or decrease of at least 1%;
     provided, however, that any adjustments which by reason of this clause (7)
     are not required to be made shall be carried forward and taken into account
     in any subsequent adjustment.  All calculations under this Article XIII
     shall be made to the nearest cent or to the nearest one-hundredth of a
     share, as the case may be.  The Company may make such reductions in the
     Conversion Price, in addition to those required by paragraphs (1), (2), (3)
     and (4) of this Section, as it considers to be advisable in order that any
     event treated for Federal income tax purposes as a dividend of stock or
     stock rights shall not be taxable to the recipients.

          (8)  The Trustee has no duty to determine when or how an adjustment
     under this Article should be made or the amount of any such adjustment.
     The Trustee has no duty to determine whether a supplemental indenture under
     Section 1311 need be entered into or whether any provisions of any
     supplemental indenture are correct.  The Trustee shall not be accountable
     for and makes no representation as to the validity or value of any
     securities or assets issued upon conversion of Securities. The Trustee
     shall not be responsible for the Company's failure to comply with this
     Article.

          Section 1305.  Notice of Adjustments of Conversion Price.

          Whenever the Conversion Price is adjusted as herein provided:

          (a)  the Company shall compute the adjusted Conversion Price in
     accordance with Section 1304 and shall prepare a certificate signed by the
     Treasurer or an Assistant Treasurer of the Company setting forth the
     adjusted Conversion Price and showing in reasonable detail the facts

                                       51

 
     upon which such adjustment is based, such certificate shall forthwith be
     filed with the Trustee and at each office or agency maintained for the
     purpose of conversion of Securities pursuant to Section 1002, and such
     certificate shall be conclusive evidence of the correctness of such
     adjustment; and

          (b)  a notice stating that the Conversion Price has been adjusted and
     setting forth the adjusted Conversion Price shall forthwith be required,
     and as soon as practicable after it is required, such notice shall be
     prepared by the Company, filed with the Trustee and mailed by the Company
     to all Holders at their last addresses as they shall appear in the Security
     Register.

          Section 1306.  Notice of Certain Corporate Action.

          In case:

          (a)  the Company shall declare a dividend (or any other distribution)
     on Common Stock payable otherwise than in cash out of its retained
     earnings; or

          (b)  the Company shall authorize the granting to the holders of Common
     Stock of rights or warrants to subscribe for or purchase any shares of
     capital stock of any class or of any other rights; or

          (c)  of any reclassification of the Common Stock of the Company (other
     than a subdivision or combination of its outstanding shares of Common
     Stock), or of any consolidation or merger to which the Company is a party
     and for which approval of any stockholders of the Company is required, or
     of the sale or transfer of all or substantially all of the assets of the
     Company; or

          (d)  of the voluntary or involuntary dissolution, liquidation or
     winding up of the Company;

then the Company shall cause to be filed with the Trustee and at each office or
agency maintained for the purpose of conversion of Securities pursuant to
Section 1002, and shall cause to be mailed to all Holders at their last
addresses as they shall appear in the Security Register, at least 15 days (or
ten days in any case specified in clause (a) or (b) above) prior to the
applicable record or effective date hereinafter specified, a notice stating (x)
the date on which a record 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
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, dissolution, liquidation or winding up. The failure to give notice
required by this Section or any defect therein shall not affect the legality or
validity of any dividend, distribution, rights, warrants, reclassification,
consolidation, merger, sale, transfer, dissolution, liquidation or winding up,
or the vote on any such action.

                                       52

 
          Section 1307.  Company to Reserve Common Stock.

          The Company shall at all times reserve and keep available, free from
preemptive rights, out of its authorized but unissued Common Stock, for the
purpose of effecting the conversion of Securities, the full number of shares of
Common Stock then issuable upon the conversion of all outstanding Securities.
          Section 1308.  Taxes on Conversion.

          The Company will pay any and all transfer taxes that may be payable in
respect of the issue or delivery of shares of Common Stock on conversion of
Securities pursuant thereto.  The Company 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 of the Holder
of the Security or Securities to be converted, and no such issue or delivery
shall be made unless and until the Person requesting such issue has paid to the
Company the amount of any such tax, or has established to the satisfaction of
the Company that such tax has been paid.

          Section 1309.  Covenant as to Common Stock.

          The Company covenants that all shares of Common Stock which may be
issued upon conversion of Securities will upon issue be fully paid and
nonassessable and, except as provided in Section 1308, the Company will pay all
taxes, liens and charges with respect to the issue thereof.

          Section 1310.  Cancellation of Converted Securities.

          All Securities delivered for conversion shall be delivered to the
Trustee for cancellation and the Trustee shall dispose of the same as provided
in Section 309.

          Section 1311.  Provisions in Case of Consolidation, Merger or Sale of
                         Assets.

          In case of any consolidation of the Company with, or merger of the
Company into, any other corporation or corporations, any merger of another
corporation into the Company (other than a merger which does not result in any
reclassification, conversion, exchange or cancellation of outstanding shares of
Common Stock of the Company) or any sale or transfer of all or substantially all
of the assets of the Company, the corporation or corporations formed by such
consolidation or resulting from such merger or which acquires such assets, as
the case may be, shall execute and deliver to the Trustee a supplemental
indenture providing that the Holder of each Security then outstanding shall have
the right thereafter, during the period such Security shall be convertible as
specified in Section 1301, to convert such Security only into the kind and
amount of securities, cash and other property receivable upon such
consolidation, merger, sale or transfer by a holder of the number of shares of
Common Stock of the Company into which such Security might have been converted
immediately prior to such consolidation, merger, sale or transfer, assuming such
holder of Common Stock of the Company (i) is not a corporation with which the
Company consolidated or into which the Company merged or which merged into the
Company or to which such sale or transfer was made, as the case may be
("constituent corporation"), or an Affiliate of a constituent corporation and
(ii) failed to exercise its rights of election, if any, as to the kind or amount
of securities, cash and other property receivable upon such consolidation,
merger, sale or transfer (provided that if the kind or amount of securities,
cash and other property receivable upon such consolidation, merger, sale or
transfer is not the same for each share of Common Stock of the Company held
immediately prior to such consolidation, merger, sale or transfer by others than
a constituent corporation or an Affiliate thereof and in respect of which such
rights of

                                       53

 
election shall not have been exercised ("non-electing share"), then for the
purpose of this Section the kind and amount of securities, cash and other
property receivable upon such consolidation, merger, sale or transfer by each
non-electing share shall be deemed to be the kind and amount so receivable per
share by a plurality of the non-electing shares).  Such supplemental indenture
shall provide for adjustments which, for events subsequent to the effective date
of such supplemental indenture, shall be as nearly equivalent as may be
practicable to the adjustments provided for in this Article. The above
provisions of this Section shall similarly apply to successive consolidations,
mergers, sales or transfers.


                                  ARTICLE XIV

                          SUBORDINATION OF SECURITIES

          Section 1401.  Securities Subordinate to Senior Indebtedness.

          The Company, for itself, its successors and assigns, covenants and
agrees, and each Holder of the Securities of each series, by their acceptance
thereof, likewise covenants and agrees, that the payment of the principal of and
premium and interest, if any, on each and all of the Securities is hereby
expressly subordinated, to the extent and in the manner set forth in this
Article, in right of payment to the prior payment in full of all Senior
Indebtedness.

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

          Section 1402.  Payment over of Proceeds of Securities on Dissolution,
                         etc.

          Upon any distribution of assets or securities of the Company in
connection with any dissolution, winding up, liquidation or reorganization of
the Company (whether in bankruptcy, insolvency or receivership proceedings or
upon an assignment for the benefit of creditors or any other marshalling of the
assets and liabilities of the Company or otherwise), the holders of all Senior
Indebtedness shall first be entitled to receive payment in full in accordance
with the terms of such Senior Indebtedness of the principal therefor and
premium, if any, and the interest due thereon before the Holders of the
Securities of any series are entitled to receive any payment or distribution
upon the principal, premium and interest, if any, on the Securities or sinking
fund payment; and, upon any such dissolution, winding up, liquidation or
reorganization, any payment or distribution of any kind or character, whether in
cash, property or securities of the Company (other than shares of stock of the
Company as reorganized or readjusted or securities of the Company or any other
corporation provided for by a plan of reorganization or readjustment, the
payment of which is subordinated to the payment of all Senior Indebtedness, at
least to the extent provided in this Article, which may at the time be
outstanding and which are provided for by a plan of reorganization or
readjustment which does not alter the rights of the holders of Senior
Indebtedness at the time outstanding and under which such other corporation, if
any, assumes all Senior Indebtedness at the time outstanding), to which the
Holders of the Securities or the Trustee would be entitled except for the
provisions of this Article, including any such payment or distribution which may
be payable or deliverable by reason of the payment of any other indebtedness of
the Company being subordinated to the payment of the Securities, shall be made
by the liquidating trustee or agent or other person

                                       54

 
making such payment or distribution, whether a trustee in bankruptcy, a receiver
or liquidating trustee or otherwise, directly to the holders of Senior
Indebtedness or their representative or representatives or to the trustee or
trustees under any indenture under which any instruments evidencing any of such
Senior Indebtedness may have been issued, ratably according to the aggregate
amounts remaining unpaid on account of the principal of (and premium, if any)
and interest on the Senior Indebtedness held or represented by each, to the
extent necessary to pay in full all Senior Indebtedness remaining unpaid, after
giving effect to any concurrent payment or distribution or provision therefor to
the holders of Senior Indebtedness.

          In the event that, notwithstanding the foregoing, upon any such
dissolution, winding up, liquidation or reorganization, any payment or
distribution of any kind or character, whether in cash, property or securities
of the Company (other than shares of stock of the Company as reorganized or
readjusted or securities of the Company or any other corporation provided for by
a plan of reorganization or readjustment, the payment of which is subordinated
to the payment of all Senior Indebtedness, at least to the extent provided by
this Article, which may at the time be outstanding and which are provided for by
a plan of reorganization or readjustment which does not alter the rights of the
holders of Senior Indebtedness at the time outstanding and under which such
other corporation, if any, assumes all Senior Indebtedness at the time
outstanding), including any such payment or distribution which may be payable or
deliverable by reason of the payment of any indebtedness of the Company, if any,
subordinated to the payment of the Securities, shall be received by the Trustee
or the Holders of the Securities before all Senior Indebtedness is paid in full,
such payment or distribution shall be paid over to the holders of such Senior
Indebtedness or their representative or representatives or to the trustee or
trustees under any indenture under which any instruments evidencing any of such
Senior Indebtedness may have been issued, ratably as aforesaid, for application
to the payment of all Senior Indebtedness remaining unpaid until all such Senior
Indebtedness shall have been paid in full, after giving effect to any concurrent
payment or distribution or provision therefor to the holders of Senior
Indebtedness.

          Subject to the payment in full of all Senior Indebtedness, the Holders
of the Securities  shall be subrogated to the rights of the holders of Senior
Indebtedness to receive payments or distributions of cash, property or
securities of the Company applicable to the holders of the Senior Indebtedness
until all amounts owing on the Securities shall be paid in full, and none of the
payments or distributions to the holders of the Senior Indebtedness to which the
Holders of the Securities or the Trustee would be entitled except for the
provisions of this Article or of payments over, pursuant to the provisions of
this Article, to the holders of the Senior Indebtedness by the Holders of the
Securities or the Trustee shall, as between the Company, its creditors other
than the holders of Senior Indebtedness, and the Holders of the Securities, be
deemed to be a payment by the Company to or on account of Senior Indebtedness,
it being understood that the provisions of this Article 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 the Senior Indebtedness, on the
other hand, and nothing contained in this Article or elsewhere in this Indenture
or in the Securities of any series is intended to or shall impair, as between
the Company, its creditors other than the holders of Senior Indebtedness, and
the Holders of the Securities, the obligation of the Company, which is
unconditional and absolute, to pay to the Holders of the Securities the
principal of and premium and interest, if any (including interest accruing
subsequent to the commencement of any proceeding for the bankruptcy or
reorganization of the Company under any applicable bankruptcy, insolvency or
similar law now or hereafter in effect), on the Securities as and when the same
shall become due and payable in accordance with their terms, or to affect the
relative rights of the Holders of the Securities and creditors of the Company
other than the holders of the Senior Indebtedness,

                                       55

 
nor shall anything herein or therein prevent the Trustee or the Holder of any
Security of any series from exercising all remedies otherwise permitted by
applicable law upon default under this Indenture, subject to the rights, if any,
under this Article, of the holders of Senior Indebtedness in respect of cash,
property or securities of the Company received upon the exercise of any such
remedy.

          The Company shall give prompt written notice to the Trustee of any
dissolution, winding up, liquidation or reorganization of the Company within the
meaning of this Article.  The Trustee, subject to the provisions of Section 601,
shall be entitled to assume that no such event has occurred and shall not be
charged with knowledge of the existence of any facts which would prohibit the
making of any payment of moneys to or by the Trustee or the taking of any other
action by the Trustee, unless the Company or any one or more holders of Senior
Indebtedness of the Company or any trustee therefor (who shall have been
certified or otherwise established to the satisfaction of the Trustee to be such
a holder or trustee) has given written notice thereof to an officer in the
Corporate Trust Department of the Trustee at its Corporate Trust Office.

          Upon any distribution of assets or securities of the Company referred
to in this Article, the Trustee and the Holders of the Securities shall be
entitled to rely upon any order or decree of a court of competent jurisdiction
in which such dissolution, winding up, liquidation or reorganization proceedings
are pending for the purpose of ascertaining the persons entitled to participate
in such distribution, the holders of the Senior Indebtedness and other
indebtedness of the Company, the amount thereof or payable thereon, the amount
or amounts paid or distributed thereon, and all other facts pertinent thereto or
to this Article, and the Trustee, subject to the provisions of Article V hereof,
and the Holders of the Securities shall be entitled to rely upon a certificate
of the liquidating trustee or agent or other person making any distribution to
the Trustee or to the Holders of the Securities for the purpose of ascertaining
the persons entitled to participate in such distribution, the holders of the
Senior Indebtedness and other indebtedness of the Company, the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article. In the event that 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 Section 1402, 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, as to the
extent to which such person is entitled to participation in such payment or
distribution, and as to other facts pertinent to the rights of such person under
this Section 1402, and if such evidence is 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 1403.  Priority of Senior Indebtedness upon Maturity.

          Upon the maturity of the principal of any Senior Indebtedness by lapse
of time, acceleration or otherwise, all matured principal of Senior Indebtedness
and interest and premium thereon shall first be paid in full before any payment
of principal or premium or interest, if any, is made upon the Securities or
before any Securities can be acquired by the Company or any sinking fund payment
is made with respect to the Securities (except required sinking fund payments
may be reduced by Securities acquired before such maturity of such Senior
Indebtedness).

                                       56

 
          Section 1404.  Obligation of Company to pay Holders of Securities not
                         Affected.

          Nothing contained in this Article or elsewhere in this Indenture, or
in any of the Securities of any series, shall affect the obligation of the
Company to make, or prevent the Company from making, payment of principal of
(including any sinking fund payment) or premium or interest, if any, on the
Securities, except under the conditions described in Section 1402 hereof or
during the pendency of any dissolution, winding up, liquidation or
reorganization proceedings referred to in Section 1402 or as provided in Section
1403 hereof.

          Section 1405.  Trustee as Holder of Senior Indebtedness.

          The Trustee shall be entitled to all rights set forth in this Article
with respect to any Senior Indebtedness at any time held by it, to the same
extent as any holder of Senior Indebtedness. Nothing in this Article shall apply
to claims of, or payments to, the Trustee under or pursuant to Article VI
hereof.

          Section 1406.  Notice to Trustee to Effectuate Subordination.

          Notwithstanding the provisions of this Article or any other provision
of the Indenture, the Trustee shall not be charged with knowledge of the
existence of any facts which would prohibit the making of any payment of moneys
to or by the Trustee unless and until an officer of the Trustee in its Corporate
Trust Department shall have received written notice thereof at its Corporate
Trust Office from the Company or from a holder of any Senior Indebtedness or
from any representative or representatives of such holder and, prior to the
receipt of any such written notice, the Trustee shall be entitled, subject to
Section 601, in all respects to assume that no such facts exist; provided, that,
if prior to the fifth Business Day preceding the date upon which by the terms
hereof any such moneys may become payable for any purpose, or in the event of
the execution of an instrument pursuant to Section 401 acknowledging
satisfaction and discharge of this Indenture, then if prior to the second
Business Day preceding the date of such execution, the Trustee shall not have
received with respect to such moneys the notice provided for in this Section,
then, anything herein contained to the contrary notwithstanding, the Trustee
may, in its discretion, receive such moneys and/or apply the same to the purpose
for which they were received, and shall not be affected by any notice to the
contrary, which may be received by it on or after such date; provided, however,
no such application shall affect the obligations under this Article of the
persons receiving such moneys from the Trustee.

          Section 1407.  Modification, Extension, etc. of Senior Indebtedness.

          The holders of Senior Indebtedness may, without affecting in any
manner the subordination of the payment of the principal of and premium and
interest, if any, on the Securities, at any time or from time to time and in
their absolute discretion, change the manner, place or terms of payment, change
or extend the time of payment of, or renew or alter, any Senior Indebtedness, or
amend or supplement any instrument pursuant to which any Senior Indebtedness is
issued, or exercise or refrain from exercising any other of their rights under
the Senior Indebtedness including, without limitation, the waiver of default
thereunder, all without notice to or assent from the Holders of the Securities
or the Trustee.

                                       57

 
          Section 1408.  Trustee has no Fiduciary Duty to Holders of Senior
                         Indebtedness.

          With respect to the holders of Senior Indebtedness, the Trustee
undertakes to perform or to observe only such of its covenants and objectives as
are specifically set forth in this Indenture, and no implied covenants or
obligations with respect to the holders of Senior Indebtedness shall be read
into this Indenture against the Trustee.  The Trustee 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 mistakenly pay over or deliver to the
Holders of Securities or the Company or any other person, money or assets to
which any holders of Senior Indebtedness shall be entitled by virtue of this
Article or otherwise.

          Section 1409.  Paying Agents other than the Trustee.

          In case at any time any Paying Agent other than the Trustee shall have
been appointed by the Company and be then acting hereunder, the term "Trustee"
as used in this Article shall in such case (unless the context shall otherwise
require) 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, provided, however,
that Sections 1405, 1406 and 1408 shall not apply to the Company if it acts as
Paying Agent.

          Section 1410.  Rights of Holders of Senior Indebtedness Not Impaired.

          No right of any present or future holder of Senior Indebtedness to
enforce the subordination herein shall at any time or in any way be prejudiced
or impaired by any act or failure to act on the part of the Company or by any
noncompliance by the Company with the terms, provisions and covenants of this
Indenture, regardless of any knowledge thereof any such holder may have or be
otherwise charged with.

          Section 1411.  All Indenture Provisions Subject to Subordination
                         Provisions.

          Notwithstanding anything contained herein to the contrary, all the
provisions of this Indenture shall be subject to the provisions of this Article,
so far as the same may be applicable thereto.

          This instrument 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.

                                       58

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

                                    ENSERCH CORPORATION



                                    By_________________________________
                                      Name:
                                      Title:

Attest:


____________________________________
Name:
Title:


 
                                    THE FIRST NATIONAL BANK
                                      OF CHICAGO



                                    By________________________________
                                      Name:
                                      Title:

Attest:


____________________________________
Name:
Title:

                                       

 
STATE OF TEXAS    )
                  ) ss.:
COUNTY OF DALLAS  )

          Before me, the undersigned authority, a Notary Public in and for said
County and State, on this day personally appeared _____________________,
____________________ of ENSERCH Corporation, a corporation, known to me to be
the person whose name is subscribed to the foregoing instrument, and
acknowledged to me that he executed the same for the purposes and consideration
therein expressed, in the capacity therein stated, and as the act and deed of
said corporation.

                                    Given under my hand and seal of office, this
_____ day of _______________, 199_____.



[SEAL]

                                    ____________________________
                                     Notary Public in and for
                                       Dallas County, Texas