__________________________________________________

                       ARMSTRONG WORLD INDUSTRIES, INC.

                                      and

                  MORGAN GUARANTY TRUST COMPANY OF NEW YORK,

                                  as Trustee

                                _______________

                                   INDENTURE

                           Dated as of March 15, 1988

                                _______________

                                Debt Securities

               __________________________________________________

 
                        ARMSTRONG WORLD INDUSTRIES, INC.
                        --------------------------------
               Reconciliation and tie between Trust Indenture Act
              of 1939 and Indenture dated as of March 15, 1988/1/




    Trust Indenture                 Indenture
     Act Section                     Section

                              
(S) 310(a)(1)    ...........     609
       (a)(2)    ...........     609
       (a)(3)    ...........     Not Applicable
       (a)(4)    ...........     Not Applicable
       (b)       ...........     608
                                 610
(S) 311(a)       ...........     613(a)
       (b)       ...........     613(b)
       (b)(2)    ...........     703(a)(2)
                                 703(b)
(S) 312(a)       ...........     701
                                 702(a)
       (b)       ...........     702(b)
       (c)       ...........     702(c)
(S) 313(a)       ...........     703(a)
       (b)       ...........     703(b)
       (c)       ...........     703(a)
                                 703(b)
       (d)       ...........     703(c)
(S) 314(a)       ...........     704
       (b)       ...........     Not Applicable
       (c)(1)    ...........     102
       (c)(2)    ...........     102
       (c)(3)    ...........     Not Applicable
       (d)       ...........     Not Applicable
       (e)       ...........     102
(S) 315(a)       ...........     601(a)
       (b)       ...........     602
                                 703(a)(6)
       (c)       ...........     601(b)
       (d)       ...........     601(c)
       (d)(1)    ...........     601(a)(1)
       (d)(2)    ...........     601(c)(2)
       (d)(3)    ...........     601(c)(3)
       (e)       ...........     514
(S) 316(a)       ...........     101
       (a)(1)(A) ...........     502
                                 512
       (a)(1)(B) ...........     513
       (a)(2)    ...........     Not Applicable
       (b)       ...........     508
(S) 317(a)(1)    ...... ....     503
       (a)(2)    ...........     504
       (b)       ...........     1003
(S) 318(a)       ...........     107


- -----------------
/1/  This reconciliation and tie shall note, for any purpose, be deemed to be a
     part of this Indenture.

 
                             TABLE OF CONTENTS/2/


                                                                            PAGE
                                                                            ----
Parties........................................................................1
Recitals of the Company........................................................1


                                  ARTICLE ONE

            DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

SECTION 101.  Definitions......................................................1
              Act..............................................................2
              Attributable Debt................................................2
              Authenticating Agent.............................................2
              Authorized Newspaper.............................................2
              Board of Directors...............................................2
              Board Resolution.................................................2
              Business Day.....................................................2
              Commission.......................................................3
              Company..........................................................3
              Company Request or Company Order.................................3
              Consolidated Net Tangible Assets.................................3
              Corporate Trust Office...........................................3
              Corporation......................................................3
              Debt.............................................................3
              Defaulted Interest...............................................3
              Event of Default.................................................3
              Government Obligations...........................................3
              Holder...........................................................4
              Indenture........................................................4
              interest.........................................................4
              Interest Payment Date............................................4
              Lien.............................................................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


_______________
/2/  This table of contents shall not, for any purpose, be deemed to be a part
     of the Indenture.

                                      -i-

 
              Predecessor Security.............................................5
              Principal Property...............................................6
              Redemption Date..................................................6
              Redemption Price.................................................6
              Regular Record Date..............................................6
              Responsible Officer..............................................6
              Restricted Subsidiary............................................6
              Sale and Leaseback Transaction...................................6
              Securities.......................................................6
              Security Register and Security Registrar.........................6
              Special Record Date..............................................7
              Stated Maturity..................................................7
              Subsidiary.......................................................7
              Trustee..........................................................7
              Trust Indenture Act..............................................7
              Vice President...................................................7
SECTION 102.  Compliance Certificates and Opinions.............................7
SECTION 103.  Form of Documents Delivered to Trustee...........................8
SECTION 104.  Acts of Holders..................................................8
SECTION 105.  Notices, Etc., to Trustee and Company............................9
SECTION 106.  Notice to Holders; Waiver........................................9
SECTION 107.  Conflict With Trust Indenture Act...............................10
SECTION 108.  Effect of Headings and Table of Contents........................10
SECTION 109.  Successors and Assigns..........................................10
SECTION 110.  Separability Clause.............................................10
SECTION 111.  Benefits of Indenture...........................................10
SECTION 112.  Governing Law...................................................10
SECTION 113.  Legal Holidays..................................................11

                                  ARTICLE TWO
 
                                SECURITY FORMS

SECTION 201.  Forms Generally.................................................11
SECTION 202.  Form of Trustee's Certificate of Authentication.................11


                                 ARTICLE THREE
 
                                THE SECURITIES


SECTION 301.  Amount Unlimited; Issuable in Series............................12
SECTION 302.  Denominations...................................................14
SECTION 303.  Execution, Authentication, Delivery and Dating..................14
SECTION 304.  Temporary Securities............................................15

                                     -ii-

 
SECTION 305.  Registration; Registration of Transfer and Exchange.............16
SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities................17
SECTION 307.  Payment of Interest; Interest Rights Preserved..................18
SECTION 308.  Persons Deemed Owners...........................................19
SECTION 309.  Cancellation....................................................19
SECTION 310.  Computation of Interest.........................................19
SECTION 311.  Automated Issuance System.......................................19


                                 ARTICLE FOUR
 
                          SATISFACTION AND DISCHARGE


SECTION 401.  Satisfaction and Discharge of Indenture.........................21
SECTION 402.  Application of Trust Money......................................22
SECTION 403.  Defeasance Upon Deposit of Moneys or Government Obligations.....22
                                                                     

                                 ARTICLE FIVE
 
                                   REMEDIES

SECTION 501.  Events of Default...............................................24
SECTION 502.  Acceleration of Maturity; Rescission and Annulment..............25
SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee 26
SECTION 504.  Trustee May File Proofs of Claim................................27
SECTION 505.  Trustee May Enforce Claims Without Possession of Securities.....28
SECTION 506.  Application of Money Collected..................................28
SECTION 507.  Limitation on Suits.............................................28
SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium 
              and Interest....................................................29
SECTION 509.  Restoration of Rights and Remedies..............................29
SECTION 510.  Rights and Remedies Cumulative..................................29
SECTION 511.  Delay or Omission Not Waiver....................................30
SECTION 512.  Control by Holders..............................................30
SECTION 513.  Waiver of Past Defaults.........................................30
SECTION 514.  Undertaking for Costs...........................................31
SECTION 515.  Waiver of Stay or Extension Laws................................31


                                  ARTICLE SIX
 
                                  THE TRUSTEE


SECTION 601.  Certain Duties and Responsibilities.............................31
SECTION 602.  Notice of Defaults..............................................33
SECTION 603.  Certain Rights of Trustee.......................................33
SECTION 604.  Not Responsible for Recitals or Issuance of Securities..........34

                                     -iii-

 
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
              (a) Elimination of Conflicting Interest or Resignation..........35
              (b) Notice of Failure to Eliminate Conflicting Interest or
                  Resign......................................................35
              (c) "Conflicting Interest" Defined..............................35
              (d) Definitions of Certain Terms Used in This Section...........38
              (e) Calculation of Percentages of Securities....................39
SECTION 609.  Corporate Trustee Required; Eligibility.........................40
SECTION 610.  Resignation and Removal; Appointment of Successor...............41
SECTION 611.  Acceptance of Appointment by Successor..........................42
SECTION 612.  Merger, Conversion, Consolidation or Succession to Business.....43
SECTION 613.  Preferential Collection of Claims Against Company...............43
              (a) Segregation and Apportionment of Certain Collections by
                  Trustee; Certain Exceptions.................................43
              (b) Certain Creditor Relationships Excluded From Segregation
                  and Apportionment...........................................45
              (c) Definitions of Certain Terms Used in This Section...........46
SECTION 614.  Authenticating Agents...........................................47


                                 ARTICLE SEVEN
 
               HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY


SECTION 701.  Company to Furnish Trustee Names and Addresses of Holders.......49
SECTION 702.  Preservation of Information; Communications to Holders..........49
SECTION 703.  Reports by Trustee..............................................50
SECTION 704.  Reports by Company..............................................51


                                 ARTICLE EIGHT
 
             CONSOLIDATION, MERGER, CONVEYANCE, TRANSFER OR  LEASE


SECTION 801.  Company May Consolidate, Etc., Only on Certain Terms............52
SECTION 802.  Successor Corporation Substituted...............................53


                                 ARTICLE NINE
 
                            SUPPLEMENTAL INDENTURES


SECTION 901.  Supplemental Indentures Without Consent of Holders..............53
SECTION 902.  Supplemental Indentures With Consent of Holders.................54
SECTION 903.  Execution of Supplemental Indentures............................55

                                     -iv-

 
SECTION 904.  Effect of Supplemental Indentures...............................56
SECTION 905.  Conformity With Trust Indenture Act.............................56
SECTION 906.  Reference in Securities to Supplemental Indentures..............56
                                                                     


                                  ARTICLE TEN
 
                                   COVENANTS

SECTION 1001. Payment of Principal, Premium and Interest......................56
SECTION 1002. Maintenance of Office or Agency.................................56
SECTION 1003. Money for Payment of Securities to be Held in Trust.............57
SECTION 1004. Statement as to Compliance......................................58
SECTION 1005. Limitation on Liens.............................................58
SECTION 1006. Limitation on Sale and Leaseback Transactions...................60
SECTION 1007. Corporate Existence.............................................61


                                ARTICLE ELEVEN
 
                           REDEMPTION OF SECURITIES

SECTION 1101. Applicability of Article........................................61
SECTION 1102. Election to Redeem; Notice to Trustee...........................62
SECTION 1103  Selection by Trustee of Securities to be Redeemed...............62
SECTION 1104. Notice of Redemption............................................62
SECTION 1105. Deposit of Redemption Price.....................................63
SECTION 1106. Securities Payable on Redemption Date...........................63
SECTION 1107. Securities Redeemed in Part.....................................64


                                ARTICLE TWELVE
 
                                 SINKING FUNDS


SECTION 1201. Applicability of Article........................................64
SECTION 1202. Satisfaction of Sinking Fund Payments with Securities...........64
SECTION 1203. Redemption of Securities for Sinking Fund.......................64


                               ARTICLE THIRTEEN
 
           REPURCHASE OF SECURITIES BY COMPANY UPON TRIGGERING EVENT


SECTION 1301. Right to Require Repurchase.....................................65
SECTION 1302. Notice; Method of Exercising Repurchase Right...................65
SECTION 1303. Certain Definitions.............................................66
 
                                      -v-

 
SIGNATURES AND SEALS..........................................................70
ACKNOWLEDGMENTS...............................................................71

 
     INDENTURE, dated as of March 15, 1988, between ARMSTRONG WORLD INDUSTRIES,
INC., a corporation duly organized and existing under the laws of the
Commonwealth of Pennsylvania (herein called the "Company"), having its principal
office at 55 West Liberty Street, Lancaster, Pennsylvania 17604, and Morgan
Guaranty Trust Company of New York, a corporation duly organized and existing
under the laws of the State of New York, as Trustee hereunder (herein called the
"Trustee"), having its principal corporate trust office at 30 West Broadway, New
York, New York 10015.

                            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 covenanted and agreed, for the equal and
proportionate benefit of all Holders of the Securities or of series thereof, as
follows:

                                  ARTICLE ONE
            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, except as otherwise herein expressly provided, the term "generally
   accepted accounting principles" with respect to any computation required or
   permitted hereunder shall mean such accounting principles as are generally
   accepted at the date of such computation; 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.

     Certain terms, used principally in Article Four, Article Six and Article
Thirteen, are defined in those Articles.

     "Act", when used with respect to any Holder, has the meaning specified in
Section 104.

     "Attributable Debt" in respect of a Sale and Leaseback Transaction means,
as of any particular time, the present value (discounted at the rate of interest
implicit in the terms of the lease involved in such Sale and Leaseback
Transaction, as determined in good faith by the Company), of the obligation of
the lessee thereunder for net rental payments (excluding, however, any amounts
required to be paid by such lessee, whether or not designated as rent or
additional rent, on account of maintenance and repairs, services, insurance,
taxes, assessments, water rates and similar charges or any amounts required to
be paid by such lessee thereunder contingent upon monetary inflation or the
amount of sales, maintenance and repairs, insurance, taxes, assessments, water
rates or similar charges) during the remaining term of such lease (including any
period for which such lease has been extended or may, at the option of the
lessor, be extended).

     "Authenticating Agent" means any agent of the Trustee which at any time
shall be appointed and acting pursuant to the provisions of Section 614.

     "Authorized Newspaper" means a newspaper of general circulation in the City
of New York, Borough of Manhattan, printed in the English language and
customarily published on each business day, whether or not published on
Saturdays, Sundays or holidays. Whenever successive weekly publications in an
Authorized Newspaper are authorized hereunder,) they may be made (unless
otherwise expressly provided herein) on the same or different days of the week
and in the same or in different Authorized Newspapers.

     "Board of Directors" means the board of directors of the Company or the
executive committee or any other committee of that board duly authorized to act
for that board hereunder.

     "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.

     "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 or
pursuant to law, regulation or executive order to close.

                                      -2-

 
     "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 corporation shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor corporation.

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

     "Consolidated Net Tangible Assets" means the aggregate amount of assets
(less applicable reserves and other properly deductible items) after deducting
therefrom (a) all goodwill, trade names, trademarks, patents, unamortized debt
discount and expense and other like intangibles and (b) all current liabilities;
all as reflected in the Company's latest audited consolidated balance sheet
contained in the Company's most recent annual report to its stockholders under
Rule 14a-3 of the Securities Exchange Act of 1934, as amended, prior to the time
as of which "Consolidated Net Tangible Assets" shall be determined.

     "Corporate Trust Office" means the office of the Trustee in New York, New
York, at which at any particular time its corporate trust business shall be
principally administered, which office at the date hereof is that indicated in
the introductory paragraph of this Indenture.

     "Corporation" includes corporations, associations, companies and business
trusts.

     "Debt" means indebtedness for borrowed money.

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

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

     "Government Obligations" means securities that are (i) direct obligations
of the United States of America or any foreign government of a sovereign state
for the payment of which its full faith and credit is pledged or (ii)
obligations of an entity controlled or supervised by and acting as an agency or
instrumentality of the United States of America or such foreign government the
payment of which is unconditionally guaranteed as a full faith and credit
obligation by the United States of America or such foreign government, as the
case may be, 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 government obligation held by such custodian for the account of the
holder of a depository receipt, provided that (except as required by law) such
custodian is 

                                      -3-

 
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 government obligation or the specific payment of interest on or principal of
the government obligation evidenced by such depository receipt.

     "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 and shall
include the terms of particular series of Securities established as contemplated
by Section 301.

     "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. 

     "Lien" shall mean any mortgage, pledge, security interest, lien or other
encumbrance.

     "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.

     "Officers' Certificate" means a certificate signed by the Chairman of the
Board, the President, any Vice President, or the Treasurer, and by the
Controller, the Secretary or any Assistant Treasurer, Assistant Controller or
Assistant Secretary, of the Company, and delivered to the Trustee. Each such
Officers' Certificate shall contain the statements provided in Section 102, if
applicable.

     "Opinion of Counsel" means a written opinion of counsel, who may be counsel
for or an employee of the Company. Each Opinion of Counsel shall contain the
statements provided in Section 102, if applicable.

     "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;

                                      -4-

 
     (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 been given any request,
demand, authorization, direction, notice, consent or waiver hereunder, the
principal amount of an Original Issue Discount Security that shall be deemed to
be Outstanding for such purposes shall be the amount of the principal thereof
that would be due and payable as of the date of such determination upon a
declaration of acceleration of the maturity thereof pursuant to Section 502, and
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 a Responsible
Officer of 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 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, except as provided in Article Six and Article Thirteen, 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 premium, if any) and
interest on the Securities of that series are payable as specified in accordance
with 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.

                                      -5-

 
     "Principal Property" means any single manufacturing plant, research
laboratory or other similar facility located within the United States of America
(other than its territories and possessions) and owned by, or leased to, the
Company or any Restricted Subsidiary, the book value of the property, plant and
equipment of which (as shown, net of depreciation, on the books of the owner or
owners) is not less than 2% of Consolidated Net Tangible Assets at the end of
the most recent fiscal year of the Company, reflected in the latest audited
consolidated statement of financial position contained in the Company's most
recent annual report to its stockholders under Rule 14a-3 of the Securities
Exchange Act of 1934, as amended, except (a) any such plant or facility (i)
owned or leased jointly or in common with one or more Persons other than the
Company and its Subsidiaries, in which the interest of the Company and its
Restricted Subsidiaries does not exceed 50%, or (ii) which the Board of
Directors determines by Board Resolution in good faith is not of material
importance to the total business conducted, or assets owned, by the Company and
its Subsidiaries as an entirety, or (b) any portion of any such plant or
facility which the Board of Directors determines by Board Resolution in good
faith not to be of material importance to the use or operation thereof.

     "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, which date shall be the last day of the calendar
month preceding such Interest Payment Date if such Interest Payment Date is the
fifteenth day of the calendar month, and shall mean the fifteenth day of the
calendar month preceding such Interest Payment Date if such Interest Payment
Date is the first day of a calendar month, whether or not such day shall be a
Business Day.

     "Responsible Officer", when used with respect to the Trustee, means any
officer of the Trustee assigned by the Trustee to administer its corporate trust
matters.

     "Restricted Subsidiary" means any Subsidiary substantially all the property
of which is located, or substantially all of the business of which is carried
on, within the United States of America (other than its territories and
possessions) which shall at the time, directly or indirectly through one or more
Subsidiaries or in combination with one or more other Subsidiaries, own or be a
lessee of a Principal Property.

     "Sale and Leaseback Transaction" has the meaning specified in Section 1006.

     "Securities" has the meaning stated in the first recital of this Indenture
and more particularly means any Securities authenticated and delivered under
this Indenture.

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

                                      -6-

 
     "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, except as provided in Article Thirteen, any corporation
of which the Company directly or indirectly owns or controls stock which under
ordinary circumstances (not dependent upon the happening of a contingency) has
voting power to elect a majority of the board of directors of such corporation.

     "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 amended and
in force at the date as of which this instrument was executed, except as
provided in Section 905.

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

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 an Officers' Certificate stating that all conditions precedent, if any,
provided for in this Indenture relating to the proposed action have been
complied with and an Opinion of Counsel stating that in the opinion of such
counsel all such conditions precedent, if any, have been complied with, except
that in the case of any such application or request as to which the furnishing
of such documents is specifically required by any provision of this Indenture
relating to such particular application or request, no additional certificate or
opinion need be furnished.

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

                                      -7-

 
     (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 representation
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 representation 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.

SECTION 104.  Acts of Holders.
              ---------------

     (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 

                                      -8-

 
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.

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

     (d)  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 made, given,
   furnished or filed in writing to or with the Trustee at its Corporate Trust
   Office and unless otherwise herein expressly provided, any such document
   shall be deemed to be sufficiently made, given, furnished or filed upon its
   receipt by a Responsible Officer of the Trustee, or

     (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 or at any other address previously furnished in writing to
   the Trustee by the Company, Attention: Secretary.

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 

                                      -9-

 
Security Register, not later than the latest date, and not earlier than the
earliest date, 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 another
provision hereof which is required to be included in this Indenture by any of
the provisions of the Trust Indenture Act, such required provision shall
control.

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.

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
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 New York.

                                     -10-

 
SECTION 113.  Legal Holidays.
              --------------

     In any case where any Interest Payment Date, Redemption Date or Stated
Maturity of any Security shall not be a Business Day at any Place of Payment,
then (notwithstanding any other provision of this Indenture or of the
Securities) payment of interest or principal (and premium, if any) 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, 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.

                                  ARTICLE TWO
                                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 pursuant to Section 311 or otherwise, 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 any such action taken 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 the initial
Securities of each series. Any such Board Resolution or record of such action
shall have attached thereto a true and correct copy of the form of Security
referred to therein approved by or pursuant to such Board Resolution.

     The Trustee's certificates of authentication shall be in substantially the
form set forth in this Article.

     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.
              -----------------------------------------------

     This is one of the Securities of the series designated therein issued under
the within-mentioned Indenture,

                                     -11-

 
                                       [full name of Trustee]
                                       as Trustee


                                       By___________________________________ 
                                           Authorized Officer


                                ARTICLE THREE 
                                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 or in one or more indentures
supplemental hereto, and set forth in an Officers' Certificate to the extent not
set forth in a Board Resolution or supplemental indenture prior to the initial
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);

     (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 or 1107);

     (3)  the date or dates on which the principal (and premium, if any) of the
   Securities of the series is payable or the method of determination thereof;

     (4)  the rate or rates, or the method of determination thereof, 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
   such interest shall be payable and the Regular Record Date for the interest
   payable on any Interest Payment Date;

     (5)  if other than such coin or currency of the United States of America as
   at the time of payment is legal tender for payment of public or private
   debts, the coin or currency or currency unit in which payment of the
   principal of, premium, if any, or interest on the Securities of the series
   shall be payable;

     (6)  if the amount of payment of principal of, premium, if any, or interest
   on the Securities of the series may be determined with reference to an index,
   formula or other method based on a coin or currency or currency unit other
   than that in 

                                     -12-

 
   which the Securities are stated to be payable, the manner in which such
   amounts shall be determined;

     (7)  if the principal of, premium, if any, or interest on the Securities of
   the series are to be payable, at the election of the Company or a holder
   thereof, in a coin or currency or currency unit other than that in which the
   Securities are stated to be payable, the period or periods within which, and
   the terms and conditions upon which, such election may be made;

     (8)  the place or places where the principal of (and premium, if any) and
   interest, if any, on the Securities of the series shall be payable and the
   office or agency for the Securities of the series maintained by the Company
   pursuant to Section 1002;

     (9)  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;

     (10) 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;

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

     (12) 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;

     (13) the application, if any, of Section 403;

     (14) the application, if any, of Article 13;

     (15) any deletions or modifications of or additions to the Events of
   Default set forth in Section 501 or covenants of the Company set forth in
   Article Ten pertaining to the Securities of the series;

     (16) the form of the Securities of the series; and

     (17) any other terms of the series (which terms shall not be inconsistent
   with the provisions of this Indenture).

     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

                                     -13-

 
Secretary or an Assistant Secretary of the Company and delivered to the Trustee
at or prior to the initial issuance of Securities of such series.

     Notwithstanding the foregoing, if the Board Resolution, action pursuant to
Board Resolution or indenture supplemental hereto establishing the terms of the
Securities of any series shall specify that the automated issuance system
described in Section 311 (or any other system, method or procedures for the
determination of terms of Securities of any series that are to be issued from
time to time) shall be available for the Securities of such series, any terms of
the Securities of such series shall be established in the manner provided for
pursuant to such system, method or procedures.

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.  Securities of each series shall be
numbered, lettered or otherwise distinguished in such manner or in accordance
with such plan as the officers of the Company executing the same may determine
with the approval of the Trustee.

SECTION 303.  Execution, Authentication, Delivery and Dating.
              ----------------------------------------------

     The Securities shall be executed on behalf of the Company by its Chairman
of the Board, its President, one of its Vice Presidents or its Treasurer, and by
its Secretary or one of its Assistant Secretaries or one of its Assistant
Treasurers, under its corporate seal or a facsimile thereof reproduced thereon
attested by its Secretary or one of its Assistant Secretaries. The signature of
any of these officers on the Securities may be manual or facsimile.

     Securities bearing the manual or facsimile signatures of individuals who
were at any time the proper officers of the 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 the Securities of such series, and the Trustee in
accordance with the Company Order shall either at one time or from time to time
pursuant to such instructions as may be described therein authenticate and
deliver the Securities of such series. In authenticating the Securities of such
series and accepting the additional responsibilities under this Indenture in
relation to the Securities of such series, the Trustee shall be entitled to
receive, and (subject to Section 601) shall be fully protected in relying upon:

                                     -14-

 
     (1)  an Officers' Certificate complying with Section 102 and stating to the
   best knowledge of the signers of such certificate that no Event of Default
   with respect to any series of Securities shall have occurred and be
   continuing; and

     (2)  an Opinion of Counsel complying with Section 102 and stating:

          (a)  the form of the Securities of such series have been established
     in conformity with the provisions of this Indenture;

          (b)  the terms of the Securities of such series have been established
     (or, when determined in the manner described in such opinion, will have
     been established) in conformity with the provisions of this Indenture; and

          (c)  that the Securities of such series, 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, reorganization and other laws of general applicability relating
     to or affecting the enforcement of creditors' rights and to general equity
     principles.

     The Trustee shall have the right to decline to authenticate and deliver the
Securities of such series if the Trustee, being advised by counsel, determines
that such action may not lawfully be taken, would expose the Trustee to personal
liability to existing Holders or would add to the obligations and duties of the
Trustee hereunder in any material respect.

     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 and is 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 compliance with Section 303 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.

                                     -15-

 
     If temporary Securities of any series are issued, the Company will cause
definitive Securities of that series to be prepared without unreasonable 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 a like principal amount of
definitive Securities of the same series of authorized denominations.  Such
exchange shall be made by the Company at its expense and without any charge
therefor.  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.

SECTION 305.  Registration; Registration of Transfer and Exchange.
              ---------------------------------------------------

     The Company shall cause to be kept for each series of Securities at one of
the offices or agencies maintained pursuant to 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 such Securities
and of transfers of such Securities, Said office or agency 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 and of like tenor, of any authorized denominations and of a like
aggregate principal amount and Stated Maturity.

     In no case shall there be more than one Security Register for a series of
Securities.

     At the option of the Holder, Securities of any series may be exchanged for
other Securities of the same series and of like tenor, of any authorized
denominations and of a like aggregate principal amount and Stated Maturity, 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.

                                     -16-

 
     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 or 1107 not involving any transfer.

     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 selection of Securities of such series to be
redeemed and ending at the close of business on the day of the mailing of a
notice of redemption of Securities of such series so selected for redemption, or
(ii) to register the transfer of or exchange any Security selected for
redemption in whole or in part, except the unredeemed portion of any Security
being redeemed in part.

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 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.

                                     -17-

 
     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.
              ----------------------------------------------

     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. At the option of
the Company, interest on the Securities of any series that bears interest may be
paid by mailing a check to the address of any Holder as such address shall
appear in the Securities Register.

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

                                     -18-

 
     (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.

SECTION 308.  Persons Deemed Owners.
              ---------------------

     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) 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 for credit against any sinking fund payment shall, if
surrendered to any Person other than the Trustee, be delivered to the Trustee
and 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 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 by the Trustee and
the Trustee shall deliver to the Company a certificate of destruction in respect
thereof.

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.

SECTION 311.  Automated Issuance System.
              -------------------------

     If the Board Resolution, action pursuant to Board Resolution or
supplemental indenture hereto establishing the terms of the Securities of any
series shall specify that the automated issuance system described in Section 311
shall be available for the Securities of such series, all issuance instructions
for the Securities of such series may be given by an authorized

                                     -19-

 
representative of the Company named as such in an Officers' Certificate (an
"Authorized Representative") by telephone through computer timesharing entered
as prescribed in the user documentation provided by Morgan Guaranty Trust
Company of New York as the Company's issuing agent (the "Agent"), such computer
timesharing system being herein called the "MPI System" (or telephone or
facsimile transmission or other writing, if the MPI System is inoperative). All
instructions must be received by the Agent not later than 3:00 P.M. New York
City time on the Business Day next preceding the delivery date of each Security
and shall include with respect to each Security:

     (1)  name of the Holder;                        
                                                     
     (2)  address of the Holder;                     
                                                     
     (3)  taxpayer identifying number of the Holder; 
                                                     
     (4)  principal amount;                          
                                                     
     (5)  maturity date;                             
                                                     
     (6)  interest rate;                             
                                                     
     (7)  delivery date; and                         
                                                     
     (8)  amount to be received in payment.           

Upon receipt of such instructions and following authentication of such
Securities, the Agent shall deliver such Securities to any placement agent
designated by the Company or its designated consignee, which delivery shall be
against receipt for payment in immediately available funds, as herein provided,
or as otherwise provided in such instructions.  Although the Agent may be
instructed to deliver Securities against payment in immediately available funds,
delivery of the Securities, in accordance with the custom prevailing in the
market, will be made before actual receipt of payment.  Therefore, once the
Agent has delivered Securities to any placement agent or its designated
consignee, the Company shall bear the risk that such placement agent or such
designated consignee fails to remit payment for the Securities or return same to
the Agent.  Each delivery of Securities hereunder shall be subject to the rules
of the New York Clearing House in effect at the time of such delivery.

Telephone instructions given to the Agent will be electronically voice-recorded
by the Agent and such recording is hereby consented to.  Should any discrepancy
develop with respect to such telephonic instructions, the instructions as
recorded and understood by the Agent will be deemed the controlling and proper
instructions, The Agent shall incur no liability to the Company in acting
hereunder upon telephonic or other instructions contemplated hereby which the
recipient thereof believed in good faith to have been given by an Authorized
Representative.

The MPI System timesharing services which may be utilized by the Company and the
Agent in the issuance of the Securities and maintenance of the Note Register are
furnished to the Agent by 

                                     -20-

 
The Service Bureau Company, a division of Control Data Corporation ("SBC"). SBC
has granted permission to the Agent to allow its clients to use such timesharing
services, and in consideration for such permission, it is agreed that, if the
Company shall have elected to use the MPI System, such services will be supplied
to the Company "as is," without warranty by SBC or the Agent. The Company hereby
waives any claims it may have against SBC or the Agent arising out of such
timesharing services and agrees that the provisions of Sections 104, 603, 604
and 607 shall inure to the benefit of the Agent to the same extent that they
inure to the benefit of the Trustee.

                                 ARTICLE FOUR
                          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 registration of transfer or exchange of
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 for cancellation; or

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

              (i)  have become due and payable, or

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

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

     and the Company, in the case of (i), (ii) or (iii) above, has deposited or
     caused to be deposited with the Trustee as trust funds in trust for the
     purpose an amount sufficient to pay and discharge the entire indebtedness
     on such Securities not

                                     -21-

 
     theretofore delivered to the Trustee for cancellation, for principal (and
     premium, if any) and interest to the date of such deposit (in the case of
     Securities 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.

SECTION 402.  Application of Trust Money.
              --------------------------

     Subject to the provisions of the last paragraph of Section 1003, all money
deposited with the Trustee pursuant to Sections 401 and 403 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 premium, if
any) and interest for whose payment such money has been deposited with the
Trustee.

SECTION 403.  Defeasance Upon Deposit of Moneys or Government Obligations.
              -----------------------------------------------------------

     To the extent made applicable to the Securities of any series by the terms
thereof established as contemplated in Section 301, at the Company's option,
either (a) the Company shall be deemed to have been Discharged (as defined
below) from its obligations with respect to the Securities of such series on the
91st day after the applicable conditions set forth below have been satisfied or
(b) the Company shall cease to be under any obligation to comply with any term,
provision or condition set forth in Sections 801, 802, 1005, 1006 and 1007 and
noncompliance with such Sections shall not give rise to any Event of Default
under Section 501(4), with respect to the Securities of such series at any time
after the applicable conditions set forth below have been satisfied:

     (1)  the Company shall have deposited or caused to be deposited irrevocably
   with the Trustee or its agent 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 an amount, or (ii) Government
   Obligations of the government in the currency of which the Securities of such
   series are denominated which through the payment of interest and principal in
   respect thereof in accordance with their terms will provide, not later than
   the due date of any payment, money in an amount, or (iii) a combination of
   (i) and (ii), sufficient, in the opinion (with respect to (ii) and (iii)) of
   a 

                                     -22-

 
   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 interest on, the outstanding Securities of such series on the dates such
   installments of interest or principal are due or to and including the
   Redemption Date irrevocably designated by the Company pursuant to
   subparagraph (5) hereof;

     (2)  if the Securities of such series are then listed on the New York Stock
   Exchange, the Company shall have delivered to the Trustee an Opinion of
   Counsel to the effect that the exercise of the option under this Section 403
   would not cause such Securities to be delisted;

     (3)  no Event of Default or event which with notice or lapse of time would
   become an Event of Default under Section 501(l), (2), (3), (5) or (6) with
   respect to the Securities of such series shall have occurred and be
   continuing on the date of such deposit;

     (4)  the Company shall have delivered to the Trustee an opinion of counsel,
   which opinion and counsel are satisfactory to the Trustee and its counsel, 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
   exercise of the 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, and, in the
   case of Securities being Discharged, and if the Trustee so requests, a
   private letter ruling to that effect received from the United States Internal
   Revenue Service or a revenue ruling pertaining to a comparable form of
   transaction to that effect published by the United States Internal Revenue
   Service, and

     (5)  if the Company has deposited or caused to be deposited money or
   Government Obligations to pay or discharge the principal of (and premium, if
   any) and interest on the Outstanding Securities of a series to and including
   a Redemption Date pursuant to subparagraph (1) hereof, such Redemption Date
   shall be irrevocable designated by a Board Resolution delivered to the
   Trustee on or prior to the date of deposit of such money or Government
   Obligations, and such Board Resolution shall be accompanied by an irrevocable
   Company Request that the Trustee give notice of such redemption in the name
   and at the expense of the Company not less than 30 nor more than 60 days
   prior to such Redemption Date in accordance with Section 1104.

      "Discharged" means 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 (A) the rights of holders of Securities of such series to receive,
from the trust fund described in clause (1) above, payment of the principal of
and the interest on such Securities when such payments are due; (B) the
Company's obligations, as the case may be, 

                                     -23-

 
with respect to such Securities under Sections 305, 306, 1002 and 1003; and (C)
the rights, powers, trusts, duties and immunities of the Trustee hereunder.

                                 ARTICLE FIVE
                                   REMEDIES

SECTION 501.  Events of Default.
              -----------------

     "Event of Default", wherever used herein with respect to Securities of any
series, means any one of the following events (whatever the reason for such
Event of Default and whether it shall be voluntary or involuntary or be effected
by operation of law or pursuant to any judgment, decree or order of any court or
any order, rule or regulation of any administrative or governmental body),
except to the extent such Event of Default is modified or deleted in respect of
the Securities of such series pursuant to Section 301(15):

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

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

     (3)  default in the deposit of any sinking fund payment, when and as due by
   the terms of a Security of that series; or

     (4)  default in the performance, or breach, of any covenant of the Company
   in this Indenture (other than a covenant or a default in whose performance or
   whose breach is elsewhere in this Section specifically dealt with or which
   has expressly been included in this Indenture solely for the benefit of a
   series of Securities other than that series), and continuance of such default
   or breach for a period of 60 days after there has been given, by registered
   or certified mail, to the Company by the Trustee or to the Company and the
   Trustee by the Holders of at least 25% in principal amount of the Outstanding
   Securities of that series a written notice specifying such default or breach
   and requiring it to be remedied and stating that such notice is a "Notice of
   Default" hereunder; or

     (5)  the entry by a court having jurisdiction in the premises of (A) a
   decree or order for relief in respect of the Company in an involuntary case
   or proceeding under any applicable Federal or State bankruptcy, insolvency,
   reorganization or other similar law or (B) a decree or order adjudging the
   Company a bankrupt or insolvent, or approving as properly filed a petition
   seeking reorganization, arrangement, adjustment or composition of or in
   respect of the Company under any applicable Federal or State law, or
   appointing a custodian, 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 for relief or any such other decree
   or order unstayed and in effect for a period of 90 consecutive days; or

                                     -24-

 
     (6)  the commencement by the Company of a voluntary case or proceeding
   under any applicable Federal or State bankruptcy, insolvency, reorganization
   or other similar law or of any other case or proceeding to be adjudicated a
   bankrupt or insolvent, or the consent by it to the entry of a decree or order
   for relief in respect of the Company in an involuntary case or proceeding
   under any applicable Federal or State bankruptcy, insolvency, reorganization
   or other similar law or to the commencement of any bankruptcy or insolvency
   case or proceeding against it, or the filing by it of a petition or answer or
   consent seeking reorganization or relief under any applicable Federal or
   State law, or the consent by it to the filing of such petition or to the
   appointment of or taking possession by a custodian, receiver, liquidator,
   assignee, trustee, sequestrator or 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

     (7)  any default by the Company in any payment of principal of or interest
   on any obligation for money borrowed beyond any period of grace provided with
   respect thereto and the aggregate obligations thereunder shall be $20,000,000
   or more, or any default by the Company in the performance or observance of
   any other agreement, term or condition contained in any agreement under which
   such obligations aggregating $20,000,000 or more is created (or if any other
   event of default thereunder or under any such agreement shall occur and be
   continuing) and the effect of such event of default is to cause, or to permit
   the holder or holders of such obligation (or a trustee on behalf of such
   holder or holders) to cause, such obligation to become due prior to any
   stated maturity; or

     (8)  any other Event of Default provided with respect to Securities of that
   series in the terms thereof established pursuant to Section 301(15).

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 the Securities of that
series are Original Issue Discount Securities, such portion of the principal
amount as may be specified in the terms of that series established pursuant to
Section 301(12)) 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

                                     -25-

 
     (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 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;

   and

     (2)  all Events of Default with respect to Securities of that series, other
   than the nonpayment of the principal of Securities of that series which has
   become due solely by such declaration of acceleration, have been cured or
   waived or 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 on any Security when
   such interest becomes due and payable and such default continues for the
   period of grace provided for with respect to such Security,

     (2)  default is made in the payment of the principal of (or premium, if
   any, on) any Security at the Maturity thereof, and such default continues for
   any period of grace provided for with respect to such Security, or

     (3)  default is made in the deposit of any sinking fund payment, when and
   as due by the terms of a Security,

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 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 and any predecessor Trustee, their agents and counsel.

                                     -26-

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

     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 the pendency of any receivership, insolvency, liquidation,
bankruptcy, reorganization, arrangement, adjustment, composition or other
judicial proceeding relative to the Company or any other obligor upon the
Securities or the property of the Company or of such other obligor or their
creditors, the Trustee (irrespective of whether the principal of the Securities
shall then be due and payable as therein expressed or by declaration or
otherwise and irrespective of whether the Trustee shall have made any demand on
the Company for the payment of overdue principal or interest) shall be entitled
and empowered, by intervention in such proceeding or otherwise,

     (i)  to file and prove a claim for the whole amount of principal (and
   premium, if any) and interest owing and unpaid in respect of the Securities
   and to file such other papers or documents as may be necessary or advisable
   in order to have the claims of the Trustee and any predecessor Trustee
   (including any claim for the reasonable compensation, expenses, disbursements
   and advances of the Trustee and any predecessor Trustee, their agents and
   counsel) and of the Holders allowed in such judicial proceeding, and

     (ii) 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 and any predecessor Trustee any amount due them for the
reasonable compensation, expenses, disbursements and advances of the Trustee and
any predecessor Trustee, their agents and counsel, and any other amounts due the
Trustee and any predecessor Trustee under Section 607.

                                     -27-

 
     Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or accept or adopt on behalf of any Holder any plan of
reorganization, arrangement, adjustment or composition affecting the Securities
or the rights of any Holder thereof or to authorize the Trustee to vote in
respect of the claim of any Holder in any such proceeding.

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.
              ------------------------------

     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 and any predecessor
  Trustee under Section 607;

     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; and

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

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)  an Event of Default with respect to Securities of such series shall
   have occurred and be continuing and such Holder has previously given written
   notice to the Trustee of such continuing Event of Default;

                                     -28-

 
     (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 whatsoever by virtue of, or by availing of, any
provision of this Indenture (including without limitation the provisions of
Section 512) 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)
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 to
institute suit for the enforcement of any such payment, and such rights shall
not be impaired without the consent of such Holder.

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 

                                     -29-

 
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 any
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 not less than 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,

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

     (3)  subject to the provisions of Section 601, the Trustee shall have the
   right to decline to follow any such direction if the Trustee in good faith
   shall, by a Responsible Officer or Officers of the Trustee, determine that
   the action so directed would involve the Trustee in personal liability or
   would be unduly prejudicial to holders not joining in 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 (premium, if any) or interest on
   any Security of such series, or

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

                                     -30-

 
     Upon any such waiver, such default shall cease to exist with respect to
such series, and any Event of Default with respect to such series 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.
              ---------------------

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

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 SIX
                                  THE TRUSTEE

SECTION 601.  Certain Duties and Responsibilities.
              -----------------------------------

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

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

                                     -31-

 
          (2)  in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon certificates or opinions furnished to
     the Trustee and conforming to the requirements of this Indenture; but in
     the case of any such certificates or opinions which by any provision hereof
     are specifically required to be furnished to the Trustee, the Trustee shall
     be under a duty to examine the same to determine whether or not they
     conform to the requirements of this Indenture.

        (b)  In case an Event of Default with respect to the Securities of any
     series has occurred and is continuing, the Trustee shall exercise such of
     the rights and powers vested in it by this Indenture with respect to such
     series, and use the same degree of care and skill in their exercise, as a
     prudent man would exercise or use under the circumstances in the conduct of
     his own affairs.

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

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

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

              (3)  the Trustee shall not be liable with respect to any action
        taken or omitted to be taken by it in good faith in accordance with the
        direction of the Holders of a majority in principal amount of the
        Outstanding Securities of any series, given pursuant to Section 512,
        relating to the time, method and place of conducting any proceeding for
        any remedy available to the Trustee, or exercising any trust or power
        conferred upon the Trustee, under this Indenture with respect to the
        Securities of such series.

        (d)  No provision of this Indenture shall require the Trustee to expend
     or risk its own funds or otherwise incur any financial liability in the
     performance of any of its duties hereunder, or in the exercise of any of
     its rights or powers, if 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.

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

                                     -32-

 
SECTION 602.  Notice of Defaults.
              ------------------

     Within 90 days after the occurrence of any default hereunder with respect
to the Securities of any series, the Trustee shall transmit by mail to all
Holders of Securities of such series, as their names and addresses appear in the
Security Register, notice of such default hereunder known to the Trustee, unless
such default shall have been cured or waived; provided, however, that, except in
                                              --------  -------
the case of a default in the payment of the principal of (or premium, if any) or
interest on any Security of such series or in the payment of any sinking fund
installment with respect to Securities of such series, the Trustee shall be
protected in withholding such notice if and so long as the board of directors,
the executive committee or a trust committee of directors or Responsible
Officers of the Trustee in good faith determine that the withholding of such
notice is in the interest of the Holders of Securities of such series; and
provided, further, that in the case of any default of the character specified in
- --------  -------
section 501(4) with respect to Securities of such series, no such notice to
Holders shall be given until at least 30 days after the occurrence of an Event
of Default. 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.

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 

                                     -33-

 
     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

        (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 or 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 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 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 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,
Paying Agent, Security Registrar or such other agent.

SECTION 606.  Money Held in Trust.
              -------------------

     Money held by the Trustee or any Paying Agent in trust hereunder need not
be segregated from other funds except to the extent required by law. The Trustee
or any Paying Agent 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

                                     -34-

 
     (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)  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 to the
   extent any such expense, disbursement or advance is due to its negligence or
   bad faith; and

     (3)  to indemnify the Trustee for, and to hold it harmless against, any
   loss, liability or expense arising out of or in connection with the
   acceptance or administration of the trust or trusts hereunder and the
   performance of its duties hereunder, including the costs and expenses of
   defending itself against any claim or liability in connection with the
   exercise or performance of any of its powers or duties hereunder, except to
   the extent any such loss, liability or expense is due to its negligence or
   bad faith.

     The Company's obligations under this Section shall constitute additional
indebtedness hereunder and shall survive satisfaction and discharge of this
Indenture.  As security for the performance of the obligations of the Company
under this Section the Trustee shall have a lien prior to 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, premium, if any, or interest, if
any, on particular Securities.  "Trustee" for purposes of this Section shall
include any predecessor Trustee, but the negligence or bad faith of any Trustee
shall not affect the Company's obligations to any other Trustee under this
Section.

SECTION 608.  Disqualification; Conflicting Interests.
              ---------------------------------------

     (a)  If the Trustee has or shall acquire any conflicting interest, as
   defined in this Section, with respect to the Securities of any series, it
   shall, within 90 days after ascertaining that it has such conflicting
   interest, either eliminate such conflicting interest or resign with respect
   to the Securities of that series in the manner and with the effect
   hereinafter specified in this Article.

     (b)  In the event that the Trustee shall fail to comply with the provisions
   of Subsection (a) of this Section with respect to the Securities of any
   series, the Trustee shall, within 10 days after the expiration of such 90-day
   period, transmit by mail to all Holders of Securities of that series, as
   their names and addresses appear in the Security Register, notice of such
   failure.

     (c)  For the purposes of this Section, the Trustee shall be deemed to have
   a conflicting interest with respect to the Securities of any series if

          (1)  the Trustee is trustee under this Indenture with respect to the
     Outstanding Securities of any series other than that series or is trustee
     under another indenture under which any other securities, or certificates
     of interest or
                                     -35-

 
     participation in any other securities, of the Company are outstanding,
     unless such other indenture is a collateral trust indenture under which the
     only collateral consists of Securities issued under this Indenture,
     provided, however, that there shall be excluded from the operation of this
     --------  -------
     paragraph (i) the indenture dated as of May 15, 1971 under which the
     Company's 8% Sinking Fund Debentures due May 15, 1996 are outstanding and
     (ii) this Indenture with respect to the Securities of any series other than
     that series or any indenture or indentures under which other securities, or
     certificates of interest or participation in other securities, of the
     Company are outstanding, if

              (i)  this Indenture (with respect to the Securities of that series
        and each other series for which the Trustee is trustee hereunder) and
        such other indenture or indentures are wholly unsecured and such other
        indenture or indentures are hereafter qualified under the Trust
        Indenture Act, unless the Commission shall have found and declared by
        order pursuant to Section 305(b) or Section 307(c) of the Trust
        Indenture Act that differences exist between the provisions of this
        Indenture with respect to Securities of that series and one or more
        other series or the provisions of such other indenture or indentures
        which are so likely to involve a material conflict of interest as to
        make it necessary in the public interest or for the protection of
        investors to disqualify the Trustee from acting as such under this
        Indenture with respect to the Securities of that series and such other
        series or under such other indenture or indentures, or

              (ii) the Company shall have sustained the burden of proving, on
        application to the Commission and after opportunity for hearing thereon,
        that trusteeship under this Indenture with respect to the Securities of
        that series and such other series or such other indenture or indentures
        is not so likely to involve a material conflict of interest as to make
        it necessary in the public interest or for the protection of investors
        to disqualify the Trustee from acting as such under this Indenture with
        respect to the Securities of that series and such other series or under
        such other indenture or indentures;

          (2)  the Trustee or any of its directors or executive officers is an
     obligor upon the Securities or an underwriter for the Company;

          (3)  the Trustee directly or indirectly controls or is directly or
     indirectly controlled by or is under direct or indirect common control with
     the Company or an underwriter for the Company;

          (4)  the Trustee or any of its directors or executive officers is a
     director, officer, partner, employee, appointee or representative of the
     Company, or of an underwriter (other than the Trustee itself) for the
     Company who is currently engaged in the business of underwriting, except
     that (i) one individual may be a 

                                     -36-

 
     director or an executive officer, or both, of the Trustee and a director or
     an executive officer, or both, of the Company but may not be at the same
     time an executive officer of both the Trustee and the Company; (ii) if and
     so long as the number of directors of the Trustee in office is more than
     nine, one additional individual may be a director or an executive officer,
     or both, of the Trustee and a director of the Company; and (iii) the
     Trustee may be designated by the Company or by any underwriter for the
     Company to act in the capacity of transfer agent, registrar, custodian,
     paying agent, fiscal agent, escrow agent or depositary, or in any other
     similar capacity, or, subject to the provisions of paragraph (1) of this
     Subsection, to act as trustee, whether under an indenture or otherwise;

          (5)  10% or more of the voting securities of the Trustee is
     beneficially owned either by the Company or by any director, partner or
     executive officer thereof, or 20% or more of such voting securities is
     beneficially owned, collectively, by any two or more of such persons; or
     10% or more of the voting securities of the Trustee is beneficially owned
     either by an underwriter for the Company or by any director, partner or
     executive officer thereof, or is beneficially owned, collectively, by any
     two or more such persons;

          (6)  the Trustee is the beneficial owner of, or holds as collateral
     security for an obligation which is in default (as hereinafter in this
     Subsection defined), (i) 5% or more of the voting securities, or 10% or
     more of any other class of security, of the Company not including the
     Securities issued under this Indenture and securities issued under any
     other indenture under which the Trustee is also trustee, or (ii) 10% or
     more of any class of security of an underwriter for the Company;

          (7)  the Trustee is the beneficial owner of, or holds as collateral
     security for an obligation which is in default (as hereinafter in this
     Subsection defined), 5% or more of the voting securities of any person who,
     to the knowledge of the Trustee, owns 10% or more of the voting securities
     of, or controls directly or indirectly or is under direct or indirect
     common control with, the Company;

          (8)  the Trustee is the beneficial owner of, or holds as collateral
     security for an obligation which is in default (as hereinafter in this
     Subsection defined), 10% or more of any class of security of any person
     who, to the knowledge of the Trustee, owns 50% or more of the voting
     securities of the Company; or

          (9)  the Trustee owns, on May 15 in any calendar year, in the capacity
     of executor, administrator, testamentary or inter vivos trustee, guardian,
     committee or conservator, or in any other similar capacity, an aggregate of
     25% or more of the voting securities, or of any class of security, of any
     person, the beneficial ownership of a specified percentage of which would
     have constituted a conflicting interest under paragraph (6), (7) or (8) of
     this Subsection. As to any 

                                     -37-

 
     such securities of which the Trustee acquired ownership through becoming
     executor, administrator or testamentary trustee of an estate which included
     them, the provisions of the preceding sentence shall not apply, for a
     period of two years from the date of such acquisition, to the extent that
     such securities included in such estate do not exceed 25% of such voting
     securities or 25% of any such class of security. Promptly after May 15 in
     each calendar year, the Trustee shall make a check of its holdings of such
     securities in any of the above-mentioned capacities as of such May 15. If
     the Company fails to make payment in full of the principal of (or premium,
     if any) or interest on any of the Securities when and as the same becomes
     due and payable, and such failure continues for 30 days thereafter, the
     Trustee shall make a prompt check of its holdings of such securities in any
     of the above-mentioned capacities as of the date of the expiration of such
     30-day period, and after such date, notwithstanding the foregoing
     provisions of this paragraph, all such securities so held by the Trustee,
     with sole or joint control over such securities vested in it, shall, but
     only so long as such failure shall continue, be considered as though
     beneficially owned by the Trustee for the purposes of paragraphs (6), (7)
     and (8) of this Subsection.

     The specification of percentages in paragraphs (5) to (9), inclusive, of
this Subsection shall not be construed as indicating that the ownership of such
percentages of the securities of a person is or is not necessary or sufficient
to constitute direct or indirect control for the purposes of paragraph (3) or
(7) of this Subsection.

     For the purposes of paragraphs (6), (7), (8) and (9) of this Subsection
only, (i) the terms "security" and "securities" shall include only such
securities as are generally known as corporate securities, but shall not include
any note or other evidence of indebtedness issued to evidence an obligation to
repay moneys lent to a person by one or more banks, trust companies or banking
firms, or any certificate of interest or participation in any such note or
evidence of indebtedness; (ii) an obligation shall be deemed to be "in default"
when a default in payment of principal shall have continued for 30 days or more
and shall not have been cured; and (iii) the Trustee shall not be deemed to be
the owner or holder of (A) any security which it holds as collateral security,
as trustee or otherwise, for an obligation which is not in default as defined in
clause (ii) above, or (B) any security which it holds as collateral security
under this Indenture, irrespective of any default hereunder, or (C) any security
which it holds as agent for collection, or as custodian, escrow agent or
depositary, or in any similar representative capacity.

     (d)  For the purposes of this Section:

          (1)  The term "underwriter", when used with reference to the Company,
     means every person who, within three years prior to the time as of which
     the determination is made, has purchased from the Company with a view to,
     or has offered or sold for the Company in connection with, the distribution
     of any security of the Company outstanding at such time, or has
     participated or has had a direct or indirect participation in any such
     undertaking, or has participated or has had a participation in the direct
     or indirect underwriting of any such undertaking, but such term shall not
     include a person

                                     -38-

 
     whose interest was limited to a commission from an underwriter or dealer
     not in excess of the usual and customary distributors' or sellers'
     commission.

          (2)  The term "director" means any director of a corporation or any
     individual performing similar functions with respect to any organization,
     whether incorporated or unincorporated.

          (3)  The term "Person" means an individual, a corporation, a
     partnership, an association, a joint-stock company, a trust, an
     unincorporated organization or a government or political subdivision
     thereof. As used in this paragraph, the term "trust" shall include only a
     trust where the interest or interests of the beneficiary or beneficiaries
     are evidenced by a security.

          (4)  The term "voting security" means any security presently entitling
     the owner or holder thereof to vote in the direction or management of the
     affairs of a person, or any security issued under or pursuant to any trust,
     agreement or arrangement whereby a trustee or trustees or agent or agents
     for the owner or holder of such security are presently entitled to vote in
     the direction or management of the affairs of a person.

          (5)  The term "Company" means any obligor upon the Securities.

          (6)  The term "executive officer" means the president, every vice
     president, every trust officer, the cashier, the secretary and the
     treasurer of a corporation, and any individual customarily performing
     similar functions with respect to any organization whether incorporated or
     unincorporated, but shall not include the chairman of the board of
     directors.

        (e)  The percentages of voting securities and other securities specified
     in this Section shall be calculated in accordance with the following
     provisions:

          (1)  A specified percentage of the voting securities of the Trustee,
     the Company or any other person referred to in this Section (each of whom
     is referred to as a "person" in this paragraph) means such amount of the
     outstanding voting securities of such person as entitles the holder or
     holders thereof to cast such specified percentage of the aggregate votes
     which the holders of all the outstanding voting securities of such person
     are entitled to cast in the direction or management of the affairs of such
     person.

          (2)  A specified percentage of a class of securities of a person means
     such percentage of the aggregate amount of securities of the class
     outstanding.

          (3)  The term "amount", when used in regard to securities, means the
     principal amount if relating to evidences of indebtedness, the number of
     shares if relating to capital shares and the number of units if relating to
     any other kind of security.

                                     -39-

 
          (4)  The term "outstanding" means issued and not held by or for the
     account of the issuer. The following securities shall not be deemed
     outstanding within the meaning of this definition:

              (i)  securities of an issuer held in a sinking fund relating to
        securities of the issuer of the same class;

              (ii) securities of an issuer held in a sinking fund relating to
        another class of securities of the issuer, if the obligation evidenced
        by such other class of securities is not in default as to principal or
        interest or otherwise;

              (iii)  securities pledged by the issuer thereof as security for an
        obligation of the issuer not in default as to principal or interest or
        otherwise; and

              (iv) securities held in escrow if placed in escrow by the issuer
        thereof;

     provided, however, that any voting securities of an issuer shall be deemed
     --------  -------
     outstanding if any person other than the issuer is entitled to exercise the
     voting rights thereof.

          (5)  A security shall be deemed to be of the same class as another
     security if both securities confer upon the holder or holders thereof
     substantially the same rights and privileges; provided, however, that, in
                                                   --------  -------
     the case of secured evidences of indebtedness, all of which are issued
     under a single indenture, differences in the interest rates or maturity
     dates of various series thereof shall not be deemed sufficient to
     constitute such series different classes and provided, further, that, in
                                                  --------  -------
     the case of unsecured evidences of indebtedness, differences in the
     interest rates or maturity dates thereof shall not be deemed sufficient to
     constitute them securities of different classes, whether or not they are
     issued under a single indenture.

SECTION 609.  Corporate Trustee Required; Eligibility.
              ---------------------------------------

     There shall at all times be a Trustee hereunder which shall 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 exercise corporate trust powers, having a combined capital and surplus
of at least $100,000,000 subject to supervision or examination by Federal or
state authority. If such corporation 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 corporation shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. If at
any time the Trustee shall cease to be eligible in accordance with the
provisions of this Section, it shall resign immediately in the manner and with
the effect hereinafter specified in this Article.

                                     -40-

 
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 resigning 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(a) 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 for a series shall cease to be eligible under Section
   609 and shall fail to resign after written request therefor by the Company or
   by any Holder of Securities of such series, or

        (3)  the Trustee shall become incapable of acting or shall be adjudged a
   bankrupt or insolvent or a receiver of the Trustee or of its property shall
   be appointed or any public officer shall take charge or control of the
   Trustee or of its property or affairs for the purpose of rehabilitation,
   conversation 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 such successor Trustee or Trustees
shall comply with the applicable 

                                     -41-

 
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
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 by mailing
written notice of such event by first-class mail, postage prepaid, to all
Holders of Securities of such series as their names and addresses appear in the
Security Register, 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,

     (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 

                                     -42-

 
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.

SECTION 613.  Preferential Collection of Claims Against Company.
              -------------------------------------------------

     (a)  Subject to Subsection (b) of this Section, if the Trustee shall be or
shall become a creditor, directly or indirectly, secured or unsecured, of the
Company within four months prior to a default, as defined in Subsection (c) of
this Section, or subsequent to such a default, then, unless and until such
default shall be cured, the Trustee shall set apart and hold in a special
account for the benefit of the Trustee individually, the Holders of the
Securities and the holders of other indenture securities, as defined in
Subsection (c) of this Section:

                                     -43-

 
     (1)  an amount equal to any and all reductions in the amount due and owing
   upon any claim as such creditor in respect of principal or interest, effected
   after the beginning of such four months' period and valid as against the
   Company and its other creditors, except any such reduction resulting from the
   receipt or disposition of any property described in paragraph (2) of this
   Subsection, or from the exercise of any right of set-off which the Trustee
   could have exercised if a petition in bankruptcy had been filed by or against
   the Company upon the date of such default; and

     (2)  all property received by the Trustee in respect of any claims as such
   creditor, either as security therefor, or in satisfaction or composition
   thereof, or otherwise, after the beginning of such four months' period, or an
   amount equal to the proceeds of any such property, if disposed of, subject,
                                                                      -------
   however, to the rights if any, of the Company and its other creditors in such
   -------
   property or such proceeds.

Nothing herein contained, however, shall affect the right of the Trustee:

     (A)  to retain for its own account (i) payments made on account of any such
   claim by any Person (other than the Company) who is liable thereon, and (ii)
   the proceeds of the bona fide sale of any such claim by the Trustee to a
   third Person, and (iii) distributions made in cash, securities or other
   property in respect of claims filed against the Company in Bankruptcy or
   receivership or in proceedings for reorganization pursuant to the Federal
   Bankruptcy Act or applicable State law;

     (B)  to realize, for its own account, upon any property held by it as
   security for any such claim, if such property was so held prior to the
   beginning of such four months' period;

     (C)  to realize, for its own account, but only to the extent of the claim
   hereinafter mentioned, upon any property held by it as security for any such
   claim, if such claim was created after the beginning of such four months'
   period and such property was received as security therefor simultaneously
   with the creation thereof, and if the Trustee shall sustain the burden of
   proving that at the time such property was so received the Trustee had no
   reasonable cause to believe that a default, as defined in Subsection (c) of
   this Section, would occur within four months; or

     (D)  to receive payment on any claim referred to in paragraph (B) or (C),
   against the release of any property held as security for such claim as
   provided in paragraph (B) or (C), as the case may be, to the extent of the
   fair value of such property.

     For the purposes of paragraphs (B), (C) and (D), property substituted after
the beginning of such four months' period for property held as security at the
time of such substitution shall, to the extent of the fair value of the property
released, have the same status as the property released, and, to the extent that
any claim referred to in any of such paragraphs is created in renewal of or in
substitution for or for the purpose of repaying or refunding any pre-existing
claim of the Trustee as such creditor, such claim shall have the same status as
such pre-existing claim.

                                     -44-

 
     If the Trustee shall be required to account, the funds and property held in
such special account and the proceeds thereof shall be apportioned among the
Trustee, the Holders and the holders of other indenture securities in such
manner that the Trustee, the Holders and the holders of other indenture
securities realize, as a result of payments from such special account and
payments of dividends on claims filed against the company in bankruptcy or
receivership or in proceedings for reorganization pursuant to the Federal
Bankruptcy Act or applicable State law, the same percentage of their respective
claims, figured before crediting to the claim of the Trustee anything on account
of the receipt by it from the Company of the funds and property in such special
account and before crediting to the respective claims of the Trustee and the
Holders and the holders of other indenture securities dividends on claims filed
against the Company in bankruptcy or receivership or in proceedings for
reorganization pursuant to the Federal Bankruptcy Act or applicable State law,
but after crediting thereon receipts on account of the indebtedness represented
by their respective claims from all sources other than from such dividends and
from the funds and property so held in such special account, As used in this
paragraph, with respect to any claim, the term "dividends" shall include any
distribution with respect to such claim, in bankruptcy or receivership or
proceedings for reorganization pursuant to the Federal Bankruptcy Act or
applicable State law, whether such distribution is made in cash, securities or
other property, but shall not include any such distribution with respect to the
secured portion, if any, of such claim. The court in which such bankruptcy,
receivership or proceedings for reorganization is pending shall have
jurisdiction (i) to apportion among the Trustee, the Holders and the holders of
other indenture securities, in accordance with the provisions of this paragraph,
the funds and property held in such special account and proceeds thereof, or
(ii) in lieu of such apportionment, in whole or in part, to give to the
provisions of this paragraph due consideration in determining the fairness of
the distributions to be made to the Trustee and the Holders and the holders of
other indenture securities with respect to their respective claims, in which
event it shall not be necessary to liquidate or to appraise the value of any
securities or other property held in such special account or as security for any
such claim, or to make a specific allocation of such distributions as between
the secured and unsecured portions of such claims, or otherwise to apply the
provisions of this paragraph as a mathematical formula.

     Any Trustee which has resigned or been removed after the beginning of such
four months' period shall be subject to the provisions of this Subsection as
though such resignation or removal had not occurred. If any Trustee has resigned
or been removed prior to the beginning of such four months' period, it shall be
subject to the provisions of this Subsection if and only if the following
conditions exist:

     (i)  the receipt of property or reduction of claim, which would have given
   rise to the obligation to account, if such Trustee had continued as Trustee,
   occurred after the beginning of such four months' period; and

     (ii) such receipt of property or reduction of claim occurred within four
   months after such resignation or removal.

     (b)  There shall be excluded from the operation of Subsection (a) of this
Section a creditor relationship arising from:

                                     -45-

 
        (1)  the ownership or acquisition of securities issued under any
     indenture, or any security or securities having a maturity of one year or
     more at the time of acquisition by the Trustee;

        (2)  advances authorized by a receivership or bankruptcy court of
     competent jurisdiction or by this Indenture, for the purpose of preserving
     any property which shall at any time be subject to the lien of this
     Indenture or of discharging tax liens or other prior liens or encumbrances
     thereon, if notice of such advances and of the circumstances surrounding
     the making thereof is given to the Holders at the time and in the manner
     provided in this Indenture;

        (3)  disbursements made in the ordinary course of business in the
     capacity of trustee under an indenture, transfer agent, registrar,
     custodian, paying agent, fiscal agent or depositary, or other similar
     capacity;

        (4)  an indebtedness created as a result of services rendered or
     premises rented; or an indebtedness created as a result of goods or
     securities sold in a cash transaction, as defined in Subsection (c) of this
     Section;

        (5)  the ownership of stock or of other securities of a corporation
     organized under the provisions of Section 25(a) of the Federal Reserve Act,
     as amended, which is directly or indirectly a creditor of the Company; and

        (6)  the acquisition, ownership, acceptance or negotiation of any
     drafts, bills of exchange, acceptances or obligations which fall within the
     classification of self-liquidating paper, as defined in Subsection (c) of
     this Section.

      (c)  For the purposes of this Section only:

        (1)  the term "default" means any failure to make payment in full of the
     principal of (or premium, if any) or interest on any of the Securities or
     upon the other indenture securities when and as such principal or interest
     becomes due and payable;

        (2)  the term "other indenture securities" means securities upon which
     the Company is an obligor outstanding under any other indenture (i) under
     which the Trustee is also trustee, (ii) which contains provisions
     substantially similar to the provisions of this Section, and (iii) under
     which a default exists at the time of the apportionment of the funds and
     property held in such special account;

        (3)  the term "cash transaction" means any transaction in which full
     payment for goods or securities sold is made within seven days after
     delivery of the goods or securities in currency or in checks or other
     orders drawn upon banks or bankers and payable upon demand;

                                     -46-

 
        (4)  the term "self-liquidating paper" means any draft, bill of
     exchange, acceptance or obligation which is made, drawn, negotiated or
     incurred by the Company for the purpose of financing the purchase,
     processing, manufacturing, shipment, storage or sale of goods, wares or
     merchandise and which is secured by documents evidencing title to,
     possession of, or a lien upon, the goods, wares or merchandise or the
     receivables or proceeds arising from the sale of the goods, wares or
     merchandise previously constituting the security, provided the security is
     received by the Trustee simultaneously with the creation of the creditor
     relationship with the Company arising from the making, drawing, negotiating
     or incurring of the draft, bill of exchange, acceptance or obligation;

        (5)  the term "Company" means any obligor upon the Securities; and

        (6)  the term "Federal Bankruptcy Act" means the Bankruptcy Act or Title
     11 of the United States Code,

SECTION 614.  Authenticating Agents.
              ---------------------

     There may be an Authenticating Agent or Authenticating Agents with respect
to one or more series of Securities appointed by the Trustee from time to time
with power to act on its behalf and subject to its direction in connection with
the authentication and delivery of Securities of such series issued upon
exchange, transfer or redemption thereof as fully to all intents and purposes as
though such Authenticating Agent had been expressly authorized to authenticate
and deliver Securities, and Securities so authenticated shall be entitled to the
benefits of this Indenture and shall be valid and obligatory for all purposes as
though authenticated by the Trustee hereunder. For all purposes of this
Indenture (except in the case of original issuance of the Securities and the
issuance of Securities in replacement of lost, stolen, mutilated or destroyed
Securities), the authentication and delivery of Securities by an Authenticating
Agent appointed pursuant to the provisions of this Section shall be deemed to be
the authentication and delivery of such Securities "by the Trustee," and
whenever this Indenture provides (except in the case of original issuance of the
Securities and the issuance of Securities in replacement of lost, stolen,
mutilated or destroyed Securities) that "the Trustee shall authenticate and
deliver" Securities, such authentication and delivery by any Authenticating
Agent shall be deemed to be authentication and delivery by the Trustee. Any such
Authenticating Agent shall at all times be a corporation organized and doing
business under the laws of the United States of America or any State or the
District of Columbia, with a combined capital and surplus of at least ten
million dollars and authorized under such laws to act as an authenticating
agent, duly registered to act as such, if and to the extent required by
applicable law and subject to supervision or examination by Federal, State or
District of Columbia authority. If such corporation publishes reports of its
condition at least annually, pursuant to law or the requirements of such
authority, then for the purposes of this Section the combined capital and
surplus of such corporation shall be deemed to be its combined capital and
surplus as set forth in its most recent report of condition so published. If at
any time an Authenticating Agent shall cease to be eligible to act as such in
accordance with the provisions of this Section, it shall resign immediately in
the manner and with the effect herein specified in this Section.

                                     -47-

 
     Any corporation into which any 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 any Authenticating Agent
shall be a party, or any corporation succeeding to the corporate agency business
of any Authenticating Agent, shall be the successor of the Authenticating Agent
hereunder, if such successor corporation is otherwise eligible to act as such in
accordance with the provisions of this Section, without the execution or filing
of any paper or any further act on the part of the Trustee or the Authenticating
Agent or such successor corporation.

     Any Authenticating Agent may at any time resign by giving written notice of
resignation to the Trustee and to the Company. The Trustee may at any time
terminate the agency of any Authenticating Agent by giving written notice of
termination to such Authenticating Agent and to the Company. Upon receiving such
a notice or resignation or upon a termination, or in case at any time any
Authenticating Agent shall cease to be eligible to act as such in accordance
with the provisions of this Section, the Trustee may appoint a successor
Authenticating Agent. Upon the appointment, at any time after the original
issuance of any of the Securities, of any successor, additional or new
Authenticating Agent, the Trustee shall give written notice of such appointment
to the Company and shall at the expense of the Company mail notice of such
appointment 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 pursuant to the provisions of this Section shall become vested with
all the rights, powers, duties and obligations of its predecessor hereunder,
with like effect as if initially named as an Authenticating Agent herein. No
successor Authenticating Agent shall be appointed unless eligible to act as such
in accordance with the provisions of this Section.

     Any Authenticating Agent by the acceptance of its appointment shall be
deemed to have represented to the Trustee that it is eligible for appointment as
Authenticating Agent under this Section and to have agreed with the Trustee
that: it will perform and carry out the duties of an Authenticating Agent as
herein set forth, including among other things the duties to authenticate and
deliver Securities when presented to it in connection with exchanges,
registrations of transfer or redemptions thereof; it will keep and maintain, and
furnish to the Trustee from time to time as requested by the Trustee,
appropriate records of all transactions carried out by it as Authenticating
Agent and will furnish the Trustee such other information and reports as the
Trustee may reasonably require; and it will notify the Trustee promptly if it
shall cease to be eligible to act as Authenticating Agent in accordance with the
provisions of this Section. Any Authenticating Agent by the acceptance of its
appointment shall be deemed to have agreed with the Trustee to indemnify the
Trustee against any loss, liability or expense incurred by the Trustee and to
defend any claim asserted against the Trustee by reason of any acts or failures
to act of such Authenticating Agent, but such Authenticating Agent shall have no
liability for any action taken by it in accordance with the specific written
direction of the Trustee.

     The Trustee agrees to pay to each Authenticating Agent from time to time
reasonable compensation and expenses for its services (to the extent such
compensation is not 

                                     -48-

 
paid by the Company), and the Trustee shall be entitled to
be reimbursed for such payments subject to the provisions of Section 607.

     The provisions of Sections 104, 603, 604 and 607 shall inure to the benefit
of each Authenticating Agent to the same extent that they inure to the benefit
of the Trustee.


                                 ARTICLE SEVEN
               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 later than January 15 and July 15 in each year, a
list, in such form as the Trustee may reasonably require, of the names and
addresses of the Holders of each series as of the preceding January 1 or July 1,
as the case may be, 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, such list to be dated as of a date not more than 15 days prior
to the time such list is furnished;

     notwithstanding the foregoing, so long as the Trustee is the Security
Registrar with respect to a particular series of Securities, no such list shall
be required to be furnished in respect of such series.

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 of each series contained in the
most recent list furnished to the Trustee as provided in Section 701 and the
names and addresses of Holders of each series 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.

     (b)  If three or more Holders of any series (herein referred to as
"applicants") apply in writing to the Trustee, and furnish to the Trustee
reasonable proof that each such applicant has owned a Security of such series
for a period of at least six months preceding the date of such application, and
such application states that the applicants desire to communicate with other
Holders of such series with respect to their rights under this Indenture or
under such Securities and is accompanied by a copy of the form of proxy or other
communication which such applicants propose to transmit, then the Trustee shall,
within five business days after the receipt of such application, at its
election, either

        (i)  afford such applicants access to the information preserved at the
     time by the Trustee in accordance with Section 702(a), or

                                     -49-

 
        (ii) inform such applicants as to the approximate number of Holders of
     Securities of such series whose names and addresses appear in the
     information preserved at the time by the Trustee in accordance with Section
     702(a), and as to the approximate cost of mailing to such Holders the form
     of proxy or other communication, if any, specified in such application.

     If the Trustee shall elect not to afford such applicants access to such
information, the Trustee shall, upon the written request of such applicants,
mail to each Holder of Securities of such series whose name and address appear
in the information preserved at the time by the Trustee in accordance with
Section 702(a) a copy of the form of proxy or other communication which is
specified in such request, with reasonable promptness after a tender to the
Trustee of the material to be mailed and of payment, or provision for the
payment, of the reasonable expenses of mailing, unless within five days after
such tender the Trustee shall mail to such applicants and file with the
Commission, together with a copy of the material to be mailed, a written
statement to the effect that, in the opinion of the Trustee, such mailing would
be contrary to the best interest of the Holders of such series or would be in
violation of applicable law.  Such written statement shall specify the basis of
such opinion.  If the Commission, after opportunity for a hearing upon the
objections specified in the written statement so filed, shall enter an order
refusing to sustain any of such objections or if, after the entry of an order
sustaining one or more of such objections, the Commission shall find, after
notice and opportunity for hearing, that all the objections so sustained have
been met and shall enter an order so declaring, the Trustee shall mail copies of
such material to all such Holders with reasonable promptness after the entry of
such order and the renewal of such tender; otherwise the Trustee shall be
relieved of any obligation or duty to such applicants respecting their
application.

     (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 the
disclosure of any such information as to the names and addresses of the Holders
in accordance with Section 702(b), regardless of the source from which such
information was derived, and that the Trustee shall not be held accountable by
reason of mailing any material pursuant to a request made under Section 702(b).

SECTION 703.  Reports by Trustee.
              ------------------

     (a)  on or before January 15 of each year commencing with the year 1989,
the Trustee shall transmit by mail to all Holders, as their names and addresses
appear in the Security Register, a brief report dated as of the preceding
November 15 with respect to:

        (1)  its eligibility under Section 609 and its qualifications under
     Section 608, or in lieu thereof, if to the best of its knowledge it has
     continued to be eligible and qualified under said Sections, a written
     statement to such effect;

        (2)  the character and amount of any advances (and if the Trustee elects
     so to state, the circumstances surrounding the making thereof) made by the
     Trustee (as such) which remain unpaid on the date of such report, and for
     the reimbursement of which it claims or may claim a lien or charge, prior
     to that of the Securities, on any 

                                     -50-

 
     property or funds held or collected by it as Trustee, except that the
     Trustee shall not be required (but may elect) to report such advances if
     such advances so remaining unpaid aggregate not more than 1/2 of 1% of the
     principal amount of the Securities Outstanding on the date of such report;

        (3)  the amount, interest rate and maturity date of all other
     indebtedness owing by the Company (or by any other obligor on the
     Securities) to the Trustee in its individual capacity, on the date of such
     report, with a brief description of any property held as collateral
     security therefor, except an indebtedness based upon a creditor
     relationship arising in any manner described in Section 613(b)(2), (3), (4)
     or (6);

        (4)  the property and funds, if any, physically in the possession of the
     Trustee as such on the date of such report;

        (5)  any additional issue of Securities which the Trustee has not
     previously reported; and

        (6)  any action taken by the Trustee in the performance of its duties
     hereunder which it has not previously reported and which in its opinion
     materially affects the Securities, except action in respect of a default,
     notice of which has been or is to be withheld by the Trustee in accordance
     with Section 602.

        (b)  The Trustee shall transmit by mail to all Holders, as their names
and addresses appear in the Security Register, a brief report with respect to
the character and amount of any advances (and if the Trustee elects so to state,
the circumstances surrounding the making thereof) made by the Trustee (as such)
since the date of the last report transmitted pursuant to Subsection (a) of this
Section (or if no such report has yet been so transmitted, since the date of
execution of this instrument) for the reimbursement of which it claims or may
claim a lien or charge, prior to that of the Securities, on property or funds
held or collected by it as Trustee and which it has not previously reported
pursuant to this Subsection, except that the Trustee shall not be required (but
may elect) to report such advances if such advances remaining unpaid at any time
aggregate 10% or less of the principal amount of the Securities Outstanding at
such time, such report to be transmitted within 90 days after such time.

     (c)  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:

        (1)  file with the Trustee, within 15 days after the Company is required
     to file the same with the Commission, copies of the annual reports and of
     the information, documents and other reports (or copies of such portions of
     any of the foregoing as the 

                                     -51-

 
     Commission may from time to time by rules and regulations prescribe) which
     the Company may be required to file with the Commission pursuant to Section
     13 or Section 15(d) of the Securities Exchange Act of 1934, as amended; or,
     if the Company is not required to file information, documents or reports
     pursuant to either of said Sections, then it shall file with the Trustee
     and the Commission, in accordance with rules and regulations prescribed
     from time to time by the Commission, such of the supplementary and periodic
     information, documents and reports which may be required pursuant to
     Section 13 of the Securities Exchange Act of 1934, as amended, in respect
     of a security listed and registered on a national securities exchange as
     may be prescribed from time to time in such rules and regulations;

        (2)  file with the Trustee and the Commission, in accordance with rules
     and regulations prescribed from time to time by the Commission, such
     additional information, documents and reports with respect to compliance by
     the Company with the conditions and covenants of this Indenture as may be
     required from time to time by such rules and regulations; and

        (3)  transmit by mail to all Holders, as their names and addresses
     appear in the Security Register, within 30 days after the filing thereof
     with the Trustee, such summaries of any information, documents and reports
     required to be filed by the Company pursuant to paragraphs (1) and (2) of
     this Section as may be required by rules and regulations prescribed from
     time to time by the Commission.

                                ARTICLE EIGHT 
             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, and the Company shall not permit any Person to
consolidate with or merge into the Company or convey, transfer or lease its
properties and assets substantially as an entirety to the Company, unless:

        (1)  in case the Company shall consolidate with or merge into another
     corporation or convey, transfer or lease its properties and assets
     substantially as an entirety to any Person, the corporation formed by such
     consolidation or into which the 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 every covenant of this Indenture on the part of the
     Company to be performed or observed;

                                     -52-

 
        (2)  immediately after giving effect to such transaction and treating
     any indebtedness which becomes an obligation of the Company or a Subsidiary
     as a result of such transaction as having been incurred by the Company or
     such Subsidiary at the time of 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;

        (3)  if, as a result of any such consolidation or merger or such
     conveyance, transfer or lease, properties or assets of the Company would
     become subject to a mortgage, pledge, lien, security interest or other
     encumbrance which would not be permitted by this Indenture, the Company or
     such successor corporation or Person, as the case may be, shall take such
     steps as shall be necessary effectively to secure the Securities equally
     and ratably with (or prior to) all indebtedness secured thereby; and

        (4)  if a supplemental indenture is required in connection with such
     transaction, the Company shall have 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 comply with this Article and that all conditions precedent herein
     provided for relating to such transaction have been complied with.

SECTION 802.  Successor Corporation Substituted.
              ---------------------------------

     Upon any consolidation by the Company with or merger by the Company into
any other corporation 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 corporation 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
corporation had been named as the Company herein, and thereafter, except in the
case of such lease, the predecessor corporation shall be relieved of all
obligations and covenants under this Indenture and the Securities and may be
liquidated and dissolved.

                                 ARTICLE NINE
                            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 corporation to the Company
     and the assumption by any such successor of the covenants of the Company
     herein and in the Securities; or

                                     -53-

 
        (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 with respect to all or any
     series of the Securities (and, if such Event of Default is applicable to
     less than all series of Securities specifying the series to which such
     Event of Default is applicable); 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

        (5)  to change or eliminate any of the provisions of this Indenture,
     provided that any such change or elimination shall become effective only
     --------
     when there is no Security Outstanding of any series created prior to the
     execution of such supplemental indenture which is adversely affected by
     such change in or elimination of such provision; or

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

        (7)  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

        (8)  to amend any provision included herein in compliance with the Trust
     Indenture Act so as to provide as required or permitted by any change in
     the Trust Indenture Act; or

        (9)  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 such other provisions as
                                             --------
     may be made 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

                                     -54-

 
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

        (2)  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

        (3)  modify any of the provisions of this Section or Section 513, except
     to increase any such percentage or to provide with respect to any
     particular series the right to condition the effectiveness of any
     supplemental indenture as to that series on the consent of the Holders of a
     specified percentage of the aggregate principal amount of Outstanding
     Securities of such series (which provision may be made pursuant to Section
     301 without the consent of any Holder) 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, or the deletion of this
     proviso, in accordance with the requirements of Sections 611(b) and 901(7).

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
(in addition to the opinion which the Trustee is 

                                     -55-

 
entitled to receive pursuant to Section 303), 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,
immunities or liabilities 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.

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 as then in effect.

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 TEN
                                   COVENANTS

SECTION 1001.  Payment of Principal, Premium and Interest.
               ------------------------------------------

     The Company will duly and punctually pay the principal of (and premium, if
any) and interest on the Securities in accordance with the terms of the
Securities and this Indenture.

SECTION 1002.  Maintenance of Office or Agency.
               -------------------------------

     The Company will maintain an Office or agency in each Place of Payment for
each series of Securities where Securities of that series may be presented or
surrendered for payment, where Securities of that series may be surrendered for
transfer or exchange 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 of
any change in the location, of such office or agency. The Corporate Trust Office
of Morgan Guaranty Trust Company of New York shall be such agency in the City of
New York, New York, and the principal corporate trust office of each Paying
Agent, if any, with respect to a

                                     -56-

 
series of securities shall be such agency in the city where such office is
located unless in any case the Company shall maintain some other office or
agency for such purpose and give the Trustee written notice of the location
thereof. If at any time the Company shall fail to maintain such office or agency
in each Place of Payment 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 in the Borough of Manhattan,
City and State of New York, and the Company hereby appoints the Trustee as its
agent to receive all such presentations, surrenders, notices and demands.

SECTION 1003.  Money for Payment of Securities 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 such
series, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum sufficient to pay the principal, premium, if any, or interest so
becoming due until such sums shall be paid to such Persons or otherwise disposed
of as herein provided, and will promptly notify the Trustee of its action or
failure so to act.

     Whenever the Company shall have one or more Paying Agents for any series of
Securities, it will, prior to each due date of the principal of (and premium, if
any) or interest on any Securities, deposit with a Paying Agent a sum sufficient
to pay the principal, premium, if any, or interest so becoming due, such sum to
be held in trust for the benefit of the Persons entitled to such principal,
premium, if any, or interest, 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:

          (1)  hold all sums held by it for the payment of principal of (and
     premium, if any) or interest on Securities of that series in trust for the
     benefit of the Persons entitled thereto until such sums shall be paid to
     such Persons or otherwise disposed of as herein provided;

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

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

     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, 

                                     -57-

 
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 three
years after such principal, 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; provided, however, that the Trustee or such
                                --------  -------
Paying Agent, before being required to make any such repayment, may at the
expense of the Company cause to be published once, in an Authorized Newspaper in
each Place of Payment, notice that such money remains unclaimed and that, after
a date specified therein, which shall not be less than 30 days from the date of
such publication, any unclaimed balance of such money then remaining will be
repaid to the Company.

SECTION 1004.  Statement as to Compliance.
               --------------------------

     The Company will deliver to the Trustee, within 120 days after the end of
each fiscal year of the Company, a written statement signed by the Chairman of
the Board, the President, a Vice President or the Treasurer of the Company
stating that:

          (1)  a review of the activities of the Company during such year and of
     performance under this Indenture has been made under his supervision; and

          (2)  to the best of his knowledge, based on such review, the Company
     has fulfilled all its obligations under this Indenture throughout such
     year, or, if there has been a default in the fulfillment of any such
     obligation, specifying each such default known to him and the nature and
     status thereof.

SECTION 1005.  Limitation on Liens.
               -------------------

     (a)  Except as otherwise provided in Subsection (b) of this Section, the
Company shall not, and shall not permit any Restricted Subsidiary to, issue,
assume or guarantee any Debt secured by a Lien upon any Principal Property of
the Company or of any Restricted Subsidiary or upon any shares of stock or Debt
of any Restricted Subsidiary (whether such Principal Property, shares of stock
or Debt are now owned or hereafter acquired) without in any such case
effectively providing concurrently with the issuance, assumption or guaranty of
any such Debt that the Securities (together with, if the Company shall so
determine, any other indebtedness of or guaranty by the Company or such
Restricted Subsidiary then existing or thereafter created which is not
subordinate to the Securities) shall be secured equally and ratably with (or, at
the option of the Company, prior to) such Debt, so long as such Debt shall be so
secured; provided, however, that nothing in this Section 1005 shall prevent,
         --------  -------
restrict or apply to 

                                     -58-

 
(and there shall be excluded from secured Debt in any computation under this
Section 1005) Debt secured by:

          (1)  Liens on property, shares of stock or indebtedness of any
     corporation existing at the time such corporation becomes a Restricted
     Subsidiary or arising thereafter (i) otherwise than in connection with the
     borrowing of money arranged thereafter and (ii) pursuant to contractual
     commitments entered into prior to and not in contemplation of such
     corporation's becoming a Restricted Subsidiary;

          (2)  Liens on any property (including shares of stock or Debt)
     existing at the time of acquisition thereof (including acquisition through
     merger or consolidation) or securing the payment of all or any part of the
     purchase price or construction cost thereof or securing any Debt incurred
     prior to, at the time of or within 180 days after, the acquisition of such
     property, shares of stock or Debt or the completion of any such
     construction, whichever is later, for the purpose of financing all or any
     part of the purchase price or construction cost thereof (provided such
     Liens are limited to such property, improvements thereon and the land upon
     which such property and improvements are located and any other property not
     then constituting a Principal Property);

          (3)  Liens on any property to secure all or any part of the cost of
     development, operation, construction, alteration, repair or improvement of
     all or any part of such property, or to secure Debt incurred prior to, at
     the time of or within 180 days after, the completion of such development,
     operation, construction, alteration, repair or improvement, whichever is
     later, for the purpose of financing all or any part of such cost (provided
     such Liens are limited to such property, improvements thereon and the land
     upon which such property and improvements are located and any other
     property not then constituting a Principal Property);

          (4)  Liens which secure Debt owing by a Restricted Subsidiary to the
     Company or to another Restricted Subsidiary or by the Company to a
     Restricted Subsidiary;

          (5)  Liens securing indebtedness of a corporation which becomes a
     successor of the Company in accordance with the provisions of Article
     Eight;

          (6)  Liens on property of the Company or a Restricted Subsidiary in
     favor of the United States of America or any State thereof, or any
     department agency or instrumentality or political subdivision of the United
     States of America or any State thereof, or in favor of any other country or
     any political subdivision thereof, to secure partial, progress, advance or
     other payments pursuant to any contract or statute or to secure any
     indebtedness incurred for the purpose of financing all or any part of the
     purchase price or the cost of construction of the property subject to such
     Liens, or in favor of any trustee or mortgagee for the benefit of holders
     of indebtedness of any such entity incurred for any such purpose;

                                     -59-

 
          (7)  Liens existing at March 15, 1988; and

          (8)  any extension, renewal or replacement (or successive extensions,
     renewals or replacements), in whole or in part, of any Lien referred to in
     the foregoing clauses (1) to (7), inclusive, or of any Debt secured
     thereby; provided that such extension, renewal or replacement Lien shall be
     limited to all or any part of the same property that secured the Lien
     extended, renewed or replaced (plus any improvements on such property) and
     shall secure no larger amount of Debt than that existing at the time of
     such extension, renewal or replacement.

     (b)  Notwithstanding the foregoing provisions of this Section 1005, the
Company and any one or more Restricted Subsidiaries may issue, assume or
guarantee Debt secured by a Lien which would otherwise be subject to the
foregoing restrictions if at the time it does so (the "Incurrence Time") the
aggregate amount of such Debt plus all other Debt of the Company and its
Restricted Subsidiaries secured by a Lien which would otherwise be subject to
the foregoing restrictions (not including Debt permitted to be secured under
clauses (1) through (8) above), plus the aggregate Attributable Debt (determined
as of the Incurrence Time) of Sale and Leaseback Transactions (other than Sale
and Leaseback Transactions permitted by Subsection (a) of Section 1006) entered
into after March 15, 1988 and in existence at the Incurrence Time (less the
aggregate amount of proceeds of such Sale and Leaseback Transactions which shall
have been applied in accordance with Subsection (c) of Section 1006), does not
exceed 10% of Consolidated Net Tangible Assets).

SECTION 1006.  Limitation on Sale and Leaseback Transactions.
               ---------------------------------------------

     The Company shall not itself, and shall not permit any Restricted
Subsidiary to, enter into any arrangements after March 15, 1988 with any bank,
insurance company or other lender or investor (other than the Company or another
Restricted Subsidiary) providing for the leasing as lessee by the Company or by
any such Restricted Subsidiary of any Principal Property (except a lease for a
temporary period not to exceed three years by the end of which it is intended
the use of such Principal Property by the lessee will be discontinued), which
was or is owned by the Company or a Restricted Subsidiary and which has been or
is to be sold or transferred by the Company or a Restricted Subsidiary, more
than 180 days after the completion of construction and commencement of full
operation thereof by the Company or such Restricted Subsidiary, to such lender
or investor or to any Person to whom funds have been or are to be advanced by
such lender or investor on the security of such Principal Property (herein
called a "Sale and Leaseback Transaction") unless:

          (a)  the Company or such Restricted Subsidiary would (at the time of
     entering into such arrangement) be entitled pursuant to clauses (1) through
     (8) of Subsection (a) of Section 1005, without equally and ratably securing
     the Securities, to issue, assume or guarantee indebtedness secured by a
     Lien on such Principal Property; or

          (b)  the Attributable Debt of the Company and its Restricted
     Subsidiaries in respect of such Sale and Leaseback Transaction and all
     other Sale and Leaseback Transactions entered into after March 15, 1988
     (other than such Sale and Leaseback 

                                     -60-

 
     Transactions as are permitted by Subsections (a) or (c) of this Section
     1006), plus the aggregate principal amount of Debt secured by Liens on
     Principal Properties then outstanding (excluding any such Debt secured by
     Liens covered in subdivisions (1) through (8) of Subsection (a) of Section
     1005) which do not equally and ratably secure the Securities, would not
     exceed 10% of Consolidated Net Tangible Assets; or

          (c)  the Company, within 180 days after the sale or transfer, applies
     or causes a Restricted Subsidiary to apply an amount equal to the greater
     of the net proceeds of such sale or transfer or fair market value of the
     Principal Property so sold and leased back at the time of entering into
     such Sale and Leaseback Transaction (in either case as determined by the
     Board of Directors) to the retirement of Securities or other indebtedness
     of the Company (other than indebtedness subordinated to the Securities) or
     indebtedness of a Restricted Subsidiary, for money borrowed, having a
     stated maturity more than 12 months from the date of such application or
     which is extendible at the option of the obligor thereon to a date more
     than 12 months from the date of such application, provided that the amount
     to be so applied shall be reduced by (i) the principal amount of Securities
     delivered within 180 days after such sale or transfer to the Trustee for
     retirement and cancellation, and (ii) the principal amount of any such
     indebtedness of the Company or a Restricted Subsidiary other than
     Securities voluntarily retired by the Company or a Restricted Subsidiary
     within 180 days after such sale or transfer. Notwithstanding the foregoing,
     no retirement referred to in this subdivision (c) may be affected by
     payment at Maturity.

Notwithstanding the foregoing, where the Company or any Restricted Subsidiary is
the lessee in any Sale and Leaseback Transaction, Attributable Debt shall not
include any Debt resulting from the guarantee by the Company or any other
Restricted Subsidiary of the lessee's obligation thereunder.

SECTION 1007.  Corporate Existence.
               -------------------

          Subject to Article Eight, 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 Board of Directors 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.

                                ARTICLE ELEVEN
                           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.

                                     -61-

 
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 and
of the principal amount of Securities of such series 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, 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 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.

     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;

                                     -62-

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

     (4)  that on the Redemption Date the Redemption Price plus the amount of
   accrued interest, if any, 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)  the place or places where such Securities are to be surrendered for
   payment of the Redemption Price; and

     (6)  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.
               ---------------------------

     At or prior to the opening of business on any Redemption Date, 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.

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 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.

                                     -63-

 
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 Stated Maturity 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.

                                ARTICLE TWELVE
                                 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 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

                                     -64-

 
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 30 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 Section 1106
and 1107.

                               ARTICLE THIRTEEN
           REPURCHASE OF SECURITIES BY COMPANY UPON TRIGGERING EVENT

SECTION 1301.  Right to Require Repurchase.
               ---------------------------

     If (a) this Article 13 is specified, as contemplated by Section 301, to be
applicable to Securities of any series and (b) at any time thereafter, the Board
of Directors or, in either of the circumstances described in clauses (i) and
(ii) below, a majority of the Disinterested Directors then in office, has by
resolution further determined in its sole and absolute discretion that this
Article 13 is applicable to the Securities of any such series (the "Board's
Further Determination") then upon the occurrence of a Triggering Event following
the Board's Further Determination or, if the Board's Further Determination
occurs after a Triggering Event, upon the Board's Further Determination, the
Holder of Securities of any such series shall have the right, at the Holder's
option, to require the Company to purchase, and upon the exercise of such right,
the Company shall purchase, all or any part of such Holder's Securities on the
date (the "Repurchase Date") that is 30 days after the date of the Triggering
Event or, if later, the date of the Board's Further Determination, at the
Redemption Price in effect on the Repurchase Date, plus accrued and unpaid
interest to the Repurchase Date.  The Board's Further Determination shall only
require the concurrence of a majority of the Disinterested Directors then in
office in the event that: (i) such determination occurs on or after the time a
Person becomes an Acquiring Person, or (ii) such determination occurs on or
after the date of a change (resulting from a proxy or consent solicitation) in a
majority of the directors in office at the commencement of such solicitation if
any Person who is a participant in such solicitation has stated (or, if upon the
commencement of such solicitation, a majority of the Board of Directors of the
Company has determined in good faith) that such Person (or any of its Affiliates
or Associates) intends to take, or may consider taking, any action which would
result in such Person becoming an Acquiring Person or which would cause the
occurrence of a Triggering Event unless, concurrent with such solicitation, such
Person (or one or more of its Affiliates of Associates) is making a cash tender
offer pursuant to a Schedule 14D-1 (or any successor form) filed with the
Commission for all outstanding shares of Common Stock not beneficially owned by
such Person (or by its Affiliates or Associates).

SECTION 1302.  Notice; Method of Exercising Repurchase Right.
               ---------------------------------------------

     On or before the seventh day after the occurrence of a Triggering Event or
the Board's Further Determination, whichever is later, the Company, or at the
request of the

                                     -65-

 
Company, the Trustee (after receipt of an Officers' Certificate of the Company
stating that a Triggering Event has occurred and that the Board's Further
Determination has been made and evidenced by a Board Resolution) shall give
notice of the Triggering Event and the Board's Further Determination, and of the
repurchase right set forth herein arising as a result thereof, by first class
mail, postage prepaid, to each Holder of Securities of any such series at such
Holder's address appearing in the register of Securities. The Company shall also
cause a copy of such notice of a repurchase right to be published once, on or
before the fifteenth day after the occurrence of the Triggering Event or the
Board's Further Determination, whichever is later, in a newspaper of general
circulation in The City of New York.

     Each notice of a repurchase right shall state:

     (1)  the Repurchase Date;

     (2)  the date by which the repurchase right must be exercised;
  
     (3)  the price at which the repurchase is to be made, if the repurchase
   right is exercised; and

     (4)  a description of the procedure which a Holder must follow to exercise
   a repurchase right.

     No failure of the Company to give the foregoing notice shall limit any
Holder's right to exercise a repurchase right.

     To exercise a repurchase right, a Holder shall deliver to the Company (or
an agent designated by the Company for such purpose in the notice referred to
above) on or before the thirtieth day after the Triggering Event or the Board's
Further Determination; whichever is later, (i) written notice of the Holder's
exercise of such right, which notice shall set forth the name of the Holder, the
principal amount of the Security or Securities (or portion of a Security) to be
repurchased, and a statement that the option to exercise the repurchased right
is being made thereby, and (ii) the Security with respect to which the
repurchase right is being exercised, duly endorsed for transfer to the Company.
Such written notice shall be irrevocable.

     In the event that a repurchase right shall be exercised in accordance with
the terms hereof, the Company shall pay or cause to be paid the price payable
with respect to the Security or Securities as to which the repurchase right has
been exercised in cash to the Holder of such Security or Securities on the
Repurchase Date. In the event that a repurchase right is exercised with respect
to less than the entire principal amount of a surrendered Security, the Company
shall issue and the Trustee shall authenticate for the Holder a new Security
equal in principal amount to the unrepurchased portion of such surrendered
Security.

SECTION 1303.  Certain Definitions.
               -------------------

     As used in this Article 13,

                                     -66-

 
     (a)  the term "Acquiring Person" shall mean any Person who or which,
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of outstanding shares of Voting Stock representing 20% or more
of the Voting Power, but shall not include the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or of any Subsidiary of the
Company, or any Person or entity organized, appointed or established by the
Company for or pursuant to the terms of any such plan,

     (b)  the terms "Affiliate" and "Associate" shall have the respective
meanings ascribed to such terms in Rule 12b-2 of the General Rules and
Regulations under the Securities Exchange Act of 1934, as amended and in effect
on March 15, 1988 (the "Exchange Act").

     (c)  a Person shall be deemed the "Beneficial Owner" of, and shall be
deemed to "beneficially own," any securities:

          (i)  which such Person or any of such Person's Affiliates or
     Associates, directly or indirectly, has the right to acquire (whether such
     right is exercisable immediately or only after the passage of time)
     pursuant to any agreement arrangement or understanding (whether or not in
     writing) or upon the exercise of conversion rights, exchange rights,
     rights, warrants or options, or otherwise; provided, however, that a Person
                                                --------
     shall not be deemed the "Beneficial Owner" of, or to "beneficially own,"
     (A) securities tendered pursuant to a tender or exchange offer made by such
     Person or any of such Person's Affiliates or Associates until such tendered
     securities are accepted for purchase or exchange, or (B) securities
     issuable upon exercise of the Company's preferred stock purchase rights at
     any time prior to the occurrence of a Triggering Event;

          (ii) which such Person or any of such Person's Affiliates or
     Associates, directly or indirectly, has the right to vote or dispose of or
     has "beneficial ownership" of (as determined pursuant to Rule 13d-3 of the
     General Rules and Regulations under the Exchange Act), including pursuant
     to any agreement, arrangement or understanding, whether or not in writing;
     provided, however, that a Person shall not be deemed the "Beneficial Owner"
     --------
     of, or to "beneficially own," any security under this subparagraph (ii) as
     a result of an agreement, arrangement or understanding to vote such
     security if such agreement, arrangement or understanding: (A) arises solely
     from a revocable proxy given in response to a public proxy or consent
     solicitation made pursuant to, and in accordance with, the applicable
     provisions of the General Rules and Regulations under the Exchange Act, and
     (B) is not also then reportable by such Person on Schedule 13D under the
     Exchange Act (or any comparable or successor report); or

          (iii)  which are beneficially owned, directly or indirectly, by any
     other Person (or any Affiliate or Associate thereof) with which such Person
     (or any of such Person's Affiliates or Associates) has any agreement,
     arrangement or understanding (whether or not in writing), for the purpose
     of acquiring, holding, voting (except pursuant to a revocable proxy as
     described in the proviso to 

                                     -67-

 
     subparagraph (ii) of this paragraph (c)) or disposing of any voting
     securities of the Company.

     (d)  the term "Disinterested Director" shall mean (i) any member of the
Board of Directors of the Company, while such person is a member of the Board,
who is not an Acquiring Person, or an Affiliate or Associate of an Acquiring
Person, or a representative of an Acquiring Person or of any such Affiliate or
Associate, and was a member of the Board prior to the time that the Acquiring
Person became an Acquiring Person, or (ii) any person who subsequently becomes a
member of the Board to fill a vacancy created by an increase in the size of the
Board, while such person is a member of the Board, who is not an Acquiring
Person, or an Affiliate or Associate of an Acquiring Person, or a representative
of an Acquiring Person or of any such Affiliate or Associate, if such person's
nomination for election by the shareholders or election to the Board is
recommended or approved by a majority of the Disinterested Directors or (iii)
any successor of a Disinterested Director who is not an Acquiring Person, or an
Affiliate or Associate of an Acquiring Person or of any such Affiliate or
Associate, if such person's nomination for election by the shareholders or
election to the Board is recommended or approved by a majority of the
Disinterested Directors.

     (e)  the term "Person" shall mean any individual, firm, corporation,
partnership or other entity.

     (f)  the term "Subsidiary" shall mean, with reference to any Person, any
corporation of which an amount of voting securities sufficient to elect at least
a majority of the directors of such corporation is beneficially owned, directly
or indirectly, by such Person, or otherwise controlled by such Person.

     (g)  the term "Triggering Event" shall mean the date on which:

          (i)  any Acquiring Person or any Associate or Affiliate of any
     Acquiring Person, at any time after March 15, 1988, directly or indirectly,
     shall merge into the Company or otherwise combine with the Company and the
     Company shall be the continuing or surviving corporation of such merger or
     combination and the Common Stock of the Company shall remain outstanding
     and unchanged, or

          (ii) any Person (other than the Company, any Subsidiary of the
     Company, any employee benefit plan of the Company or of any Subsidiary of
     the Company, or any Person or entity organized, appointed or established by
     the Company for or pursuant to the terms of any such plan), alone or
     together with its Affiliates and Associates, shall, at any time after March
     15, 1988, become the Beneficial Owner of shares of Voting Stock
     representing 28% or more of the Voting Power, or

          (iii)  following the first date of public announcement (which, for all
     purposes hereof, shall include, without limitation, a report filed pursuant
     to Section 13(d) under the Exchange Act) by the Company or an Acquiring
     Person 

                                     -68-

 
     that an Acquiring Person has become such, directly or indirectly,
     (x) the Company shall consolidate with, or merge with and into, any other
     Person (other than a Subsidiary of the Company in a transaction that will
     not diminish substantially or otherwise eliminate the benefits intended to
     be afforded by this Article 13), and the Company shall not be the
     continuing or surviving corporation of such consolidation or merger, (y)
     any Person (other than a Subsidiary of the Company in a transaction that
     will not diminish substantially or otherwise eliminate the benefits
     intended to be afforded by this Article 13) shall consolidate with, or
     merge with or into, the Company, and the Company shall be the continuing or
     surviving corporation of such consolidation or merger and, in connection
     with such consolidation or merger, all or part of the outstanding shares of
     Common Stock shall be changed into or exchanged for stock or other
     securities of any other Person or cash or any other property, or (z) the
     Company shall sell or otherwise transfer (or one or more of its
     Subsidiaries shall sell or otherwise transfer), in one transaction or a
     series of related transactions, assets or earning power aggregating more
     than 50% of the assets or earning power of the Company and its Subsidiaries
     (taken as a whole) to any Person or Persons (other than the Company or any
     Subsidiary of the Company in one or more transactions each of which will
     not diminish substantially or otherwise eliminate the benefits intended to
     be afforded by this Article 13).

     (h)  the term "Voting Power" shall mean, at any particular point in time,
the total number of votes that all holders of the then outstanding shares of
capital stock of the Company would be entitled to cast in an annual election of
the directors of the Company, voting together as a single class.

     (i)  the term "Voting Stock" shall mean the Common Stock, par value $1.00
per share, of the Company and all other equity securities of the Company that
would entitle the holders thereof to cast votes in an election of directors of
the Company.

                                    *  *  *

     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.

                                     -69-

 
                             SIGNATURES AND SEALS

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,

ATTEST:                                ARMSTRONG WORLD INDUSTRIES, INC.


/s/ David D. Wilson                    By /s/ Charles A. Walker, Jr.
- -----------------------------------      ------------------------------
(Corporate Seal)



ATTEST:                                MORGAN GUARANTY TRUST COMPANY OF NEW YORK



/s/ April Schmauder                    By /s/ John W. Cole
- -----------------------------------      ------------------------------
(Corporate Seal)

                                     -70-

 
                                ACKNOWLEDGMENTS

THE STATE OF NEW YORK      )
                           )
COUNTY OF NEW YORK         )

     BEFORE ME, the undersigned authority, on this day personally appeared,
Charles A. Walker, Jr., the Vice President of Armstrong World Industries, Inc.,
known to me to be the person whose name is subscribed to the above and foregoing
instrument of writing, 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; and, being by me duly sworn, did
depose and say that he resides at 151 Wilson Drive Lancaster, PA 17603, that he
is the Vice President of said corporation, that he knows the seal of said
corporation, that the seal affixed to said instrument is such corporate seal,
that it was so affixed by authority of the Board of Directors of said
corporation, and that he signed his name thereto by like authority.

     GIVEN UNDER MY HAND AND SEAL OF OFFICE, this 26 day of April, 1988.


                             Elizabeth R. Cava
                             -----------------------------------------------
                             Notary Public in and for New York, New York

                             My commission expires on:  February 28, 1989


THE STATE OF NEW YORK      )
                           )
COUNTY OF NEW YORK         )

     BEFORE ME, the undersigned authority, on this day personally appeared John
W. Cole, a Vice President, known to me to be the person whose name is subscribed
to the above and foregoing instrument of writing, 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; and, being
by me duly sworn, did depose and say that he resides at Staten Island, NY, that
he is a Vice President of said corporation, that he knows the seal of said
corporation, that the seal affixed to said instrument is such corporate seal,
that it was so affixed by authority of the Board of Directors of said
corporation, and that he signed his name thereto by like authority.

     GIVEN UNDER MY HAND AND SEAL OF OFFICE, this 26 day of April, 1988.


                             Beth Sweeney
                             ----------------------------------------------- 
                             Notary Public in and for New York, New York
  
                             My commission expires on:  June 22, 1989

                                     -71-