Exhibit 4.1

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                            DRESSER INDUSTRIES, INC.

                                       AND

                               TEXAS COMMERCE BANK
                              NATIONAL ASSOCIATION,
                                             Trustee



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                          FIRST SUPPLEMENTAL INDENTURE


                           DATED AS OF AUGUST 6, 1996



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                      Unsecured Debentures, Notes and Other
                            Evidences of Indebtedness




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    FIRST SUPPLEMENTAL INDENTURE, dated as of August 6, 1996, (the "First 
Supplemental Indenture") between DRESSER INDUSTRIES, INC., a corporation 
incorporated and existing under the laws of the State of Delaware 
("Company"), and TEXAS COMMERCE BANK NATIONAL ASSOCIATION, a national banking 
association, as Trustee ("Trustee").

     Each party agrees as follows for the benefit of the other party and for 
the equal and ratable benefit of the holders of the Company's unsecured 
debentures, notes and other evidences of indebtedness from time to time 
authenticated and delivered pursuant to the Indenture (as defined below), as 
supplemented hereby:

                             RECITALS OF THE COMPANY

     The Company and the Trustee are parties to that certain Indenture, dated 
as of April 18, 1996 (the "Indenture"). Section 9.01 of the Indenture 
provides that the Company, when authorized by its Board of Directors, and the 
Trustee may amend the Indenture or the Securities, without the consent of any 
Securityholder to, among other things, make such provisions with respect to 
matters or questions arising under the Indenture as may be desirable and not 
inconsistent with the Indenture or with any Board Resolution establishing any 
series of Securities, provided that such amendment does not adversely affect 
the rights of Securityholders. This First Supplemental Indenture is being 
executed for the purpose of modifying the defeasance provisions contained in 
Article VIII of the Indenture.

     All things necessary to make this First Supplemental Indenture a valid 
and legally binding agreement of the Company have been done.

     Capitalized Terms used but not defined herein shall have the meanings 
ascribed thereto in the Indenture.

     The Company and Trustee hereby agree to amend the Indenture as follows:



                                  ARTICLE I

                            AMENDMENTS TO INDENTURE

SECTION 1.01 RESTATEMENT OF ARTICLE 8.

      Article 8 of the Identure is hereby amended and restated in its 
entirety as follows:

                                   "ARTICLE 8

                      DISCHARGE OF INDENTURE AND SECURITIES

      SECTION 8.01.  SATISFACTION AND DISCHARGE OF INDENTURE.  If at any time 
(a) the Company shall have paid or caused to be paid the Principal of and 
interest on all the Securities of any series outstanding hereunder, as and 
when the same shall have become due and payable, or (b) the Company shall 
have delivered to the Trustee for cancellation all Securities of any series 
theretofore authenticated (other than any Securities of such series which 
shall have been destroyed, lost or stolen and which shall have been replaced 
as provided in Section 2.07 or paid), and if, in any such case, the 



Company shall also pay or cause to be paid all other sums payable hereunder 
by the Company with respect to Securities of such series, then this Indenture 
shall cease to be of further effect with respect to Securities of such series 
(except as to (i) rights of registration of transfer and exchange, and the 
Company's right of optional redemption, if any, (ii) substitution of 
apparently mutilated, defaced, destroyed, lost or stolen Securities, (iii) 
the rights, obligations and immunities of the Trustee hereunder, (iv) the 
rights of the Securityholders of such series as beneficiaries hereof with 
respect to the property deposited with the Trustee payable to all or any of 
them, (v) all other obligations of the Company in Sections 2.03, 2.04, 2.05, 
2.06, 2.07, 7.07, 7.08 and 8.06 and (vi) the Company's rights pursuant to 
Sections 7.08, 8.05 and 8.06), and the Trustee, on demand of the Company 
accompanied by an Officers' Certificate and an Opinion of Counsel and at the 
cost and expense of the Company, shall execute proper instruments 
acknowledging such satisfaction of and discharging this Indenture with 
respect to Securities of such series.  The Company agrees to reimburse the 
Trustee for any costs or expenses thereafter reasonably and properly incurred 
and to compensate the Trustee for any services thereafter reasonably and 
properly rendered by the Trustee in connection with this Indenture or the 
Securities of such series.

      SECTION 8.02.  LEGAL DEFEASANCE AND COVENANT DEFEASANCE.

     (a)  The Company may, at its option by a Board Resolution, at any time, 
with respect to Securities of any Series, elect to have either paragraph (b) 
or paragraph (c) below be applied to the outstanding Securities of such 
series upon compliance with the conditions set forth in paragraph (d).

     (b)  Upon the Company's exercise under paragraph (a) of the option 
applicable to this paragraph (b), the Company shall be deemed to have been 
released and discharged from its obligations with respect to the outstanding 
Securities of such series on the date the conditions set forth below are 
satisfied (hereinafter, "legal defeasance").  For this purpose, legal 
defeasance means that the Company shall be deemed to have paid and discharged 
the entire indebtedness represented by the outstanding Securities of such 
series, which shall thereafter be deemed to be "outstanding" only for the 
purposes of Section 8.04 and the other Sections of and matters under this 
Indenture referred to in (i) and (ii) below, and to have satisfied all its 
other obligations under such Securities and this Indenture insofar as such 
Securities are concerned (and the Trustee, at the expense of the Company, 
shall execute proper instruments acknowledging the same), except for the 
following which shall survive until otherwise terminated or discharged 
hereunder:  (i) the rights of Holders of outstanding Securities of such 
series to receive solely from the trust fund described in paragraph (d) below 
and as more fully set forth in such paragraph, payments in respect of the 
Principal of and interest on such Securities when such payments are due, (ii) 
the Company's obligations with respect to such Securities under Sections 
2.02, 2.03, 2.05, 2.06, 2.07 and 4.06 and, with respect to the Trustee, under 
Sections 7.07 and 7.08, (iii) the rights, powers, trusts, duties and 
immunities of the Trustee hereunder and (iv) this Section 8.02 and Sections 
8.04, 8.05, 8.06 and 8.07.  Subject to compliance with this Section 8.02, the 
Company may exercise its option under this paragraph (b) notwithstanding the 
prior exercise of its option under paragraph (c) below with respect to such 
Securities.



     (c)  Upon the Company's exercise under paragraph (a) of the option 
applicable to this paragraph (c), the Company shall be released and 
discharged from its obligations under any covenant contained in Sections 4.02 
through 4.05 and from the operation of Sections 6.01(4), 6.01(5), 6.01(6) and 
6.01(7) (except for obligations mandated by the TIA) with respect to the 
outstanding Securities of such series on and after the date the conditions 
set forth below are satisfied (hereinafter, "covenant defeasance"), and such 
Securities shall thereafter be deemed to be not "outstanding" for the purpose 
of any direction, waiver, consent or declaration or act of Holders (and the 
consequences of any thereof) in connection with such covenants and 
provisions, but shall continue to be deemed "outstanding" for all other 
purposes hereunder.  For this purpose, such covenant defeasance means that, 
with respect to the outstanding Securities of such series, the Company may 
omit to comply with and shall have no liability in respect of any term, 
condition or limitation set forth in any such covenant, whether directly or 
indirectly, by reason of any reference elsewhere herein to any such covenant 
or by reason of any reference in any such covenant to any other provision 
herein or in any other document and such omission to comply with any such 
covenant shall not constitute a Default or an Event of Default under Section 
6.01(3), but, except as specified above, the remainder of this Indenture and 
such Securities shall be unaffected thereby.

     (d)  The following shall be the conditions to application of either 
paragraph (b) or paragraph (c) above to the outstanding Securities of any 
series:

          (i)  the Company shall irrevocably have deposited or caused to be
     deposited with the Trustee funds in cash and/or U.S. Government Obligations
     sufficient without reinvestment thereof, in the opinion of a nationally
     recognized firm of independent public accountants expressed in a written
     certification thereof delivered to the Trustee, to pay and discharge not
     later than one day before the due date of any such payments, and which
     shall be applied by the Trustee to pay and discharge when due, Principal of
     and interest on the Securities of such series to Stated Maturity or
     redemption, as the case may be, not theretofore delivered to the Trustee
     for cancellation; PROVIDED that in order to have money available on a
     payment date to pay Principal or interest on the Securities of such series,
     the U.S. Government Obligations shall be payable as to principal and
     interest on or before such payment date in such amounts as will provide the
     necessary money;

          (ii) the Company shall have delivered to the Trustee an Opinion of
     Counsel in the United States stating that (which may be based on an
     Internal Revenue Service ruling) to the effect that the Holders of the
     outstanding Securities of such series will not recognize income, gain or
     loss for United States Federal income tax purposes as a result of such 
     deposit and legal defeasance or covenant defeasance, as the case may be, 
     and will be subject to United States Federal income tax on the same 
     amounts, in the same manner and at the same times as would have been the
     case if such deposit and legal defeasance or covenant defeasance had not
     occurred; and


          (iii) such deposit, legal defeasance or covenant defeasance, as the 
     case may be, and discharge will not cause the Securities of such series
     to be delisted from any securities exchange on which they are the listed.


      SECTION 8.03.  SATISFACTION AND DISCHARGE OF SECURITIES.  Securities of 
a series shall be deemed to have been paid in full as between the Company and 
the respective Holders (and future Holders) of Securities of such series upon 
the satisfaction and discharge of the Indenture with respect to Securities of 
such series pursuant to Section 8.01 or 8.02(b), except that in the case of 
such satisfaction and discharge as a result of compliance with Section 
8.02(b), the Securities of such series shall be deemed to have been paid in 
full as between the Company and the respective Holders (and future Holders) 
of Securities of such series only if the deposit in trust with the Trustee by 
the Company of the funds in cash and/or U.S. Government Obligations as 
provided in Section 8.02 is not subsequently deemed a preference under the 
United States Bankruptcy Code as then in effect.

      SECTION 8.04.  APPLICATION BY TRUSTEE OF MONEY OR U.S. GOVERNMENT 
OBLIGATIONS.  Subject to Section 8.06, all money or U.S. Government 
Obligations deposited with the Trustee pursuant to Section 8.02 shall be held 
in trust and applied by it to the payment, either directly or through the 
Paying Agent to the Holders of the particular Securities of such series for 
the payment or redemption of which such money or U.S. Government Obligations 
shall have been deposited with the Trustee, of all sums due and to become due 
thereon for principal and interest but money so held in trust need not be 
segregated from other funds except to the extent required by law.

      SECTION 8.05.  REPAYMENT OF MONEY OR U.S. GOVERNMENT OBLIGATIONS BY 
PAYING AGENT. All money or U.S. Government Obligations held by the Paying 
Agent pursuant to Section 8.05 shall, upon demand of the Company, be paid or 
delivered to the Trustee and thereupon the Paying Agent shall be released 
from all further liability with respect to such money or U.S. Government 
Obligations.

      SECTION 8.06.  RETURN OF MONEY, SECURITIES OR U.S. GOVERNMENT 
OBLIGATIONS. The Trustee and the Paying Agent shall promptly pay to the 
Company upon request any money, U.S. Government Obligations or Securities 
that, in the opinion of a nationally recognized firm of independent public 
accountants expressed in a written certification thereof delivered to the 
Trustee, are in excess of the amount required under Section 8.02.  Any money 
or U.S. Government Obligations deposited with or paid to the Trustee or the 
Paying Agent for the payment of the Principal of, or interest on any Security 
of any series and not applied but remaining unclaimed for two years after the 
date upon which such Principal or interest shall become due and payable, 
shall, upon the request of the Company and unless otherwise required by 
mandatory provisions of applicable escheat or abandoned or unclaimed property 
laws, be repaid or delivered to the Company by the Trustee for such series or 
by the Paying Agent, and the Holder of the Security of such series shall, 
unless otherwise required by mandatory provisions of applicable escheat or 
abandoned or unclaimed property laws, thereafter look only to the Company for 
any payment which such Holder 



may be entitled to collect, and all liability of the Trustee or the Paying 
Agent with respect to such money or U.S. Government Obligations shall 
thereupon cease.

     SECTION 8.07.  REINSTATEMENT.  If the Trustee is unable to apply any 
money or U.S. Government Obligations in accordance with Section 8.02 by 
reason of any legal proceeding or by reason of any order or judgment of any 
court or governmental authority enjoining, restraining or otherwise 
prohibiting such application, the Company's obligations under this Indenture 
and the Securities shall be revived and reinstated as though no deposit had 
occurred pursuant to Section 8.02 until such time as the Trustee is permitted 
to apply all such money or U.S. Government Obligations in accordance with 
Section 8.02."


                                  ARTICLE II

                                 MISCELLANEOUS

SECTION 2.01. CONFIRMATION OF INDENTURE.  The Indenture, as supplemented and 
amended by this First Supplemental Indenture, is in all respects ratified and 
confirmed, and the Indenture, this First Supplemental Indenture and all 
indentures supplemental thereto shall be read, taken and construed as one and 
the same instrument.

SECTION 2.02. CONCERNING THE TRUSTEE.  The Trustee assumes no duties, 
responsibilities or liabilities by reason of this First Supplemental 
Indenture other than as set forth in the Indenture. Simultaneously with and 
as a condition to the execution of this First Supplemental Indenture, the 
Company is delivering to the Trustee an Officers' Certificate and an Opinion 
of Counsel stating that the amendment of the Indenture as set forth in this 
First Supplemental Indenture is authorized or permitted pursuant to the 
Indenture and that it complies with the provisions thereof.

SECTION 2.03. GOVERNING LAW.  This First Supplemental Indenture, the 
Indenture and the Securities issued thereunder shall be governed by and 
construed in accordance with the internal laws of the State of Texas.

SECTION 2.04. SEPARABILITY.  In case any one or more of the provisions 
contained in this First Supplemental Indenture shall for any reason be held 
to be invalid, illegal or unenforceable in any respect, such invalidity, 
illegality or unenforceability shall not affect any other provisions of this 
First Supplemental Indenture, but this First Supplemental Indenture shall be 
construed as if such invalid, illegal or unenforceable provision had never 
been contained herein.

SECTION 2.05. COUNTERPARTS.  This First Supplemental Indenture may be 
executed in any number of counterparts each of which shall be an original, 
but such counterparts shall together constitute but one and the same 
instrument.

     IN WITNESS WHEREOF, the parties hereto have caused the First Indenture 
Supplement to be duly executed  and the Company has caused its seal to be 
hereunto affixed and attested, all as of the day and year first above Written.

                              DRESSER INDUSTRIES, INC.



                              By      
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                                      B. D. St. John
                                      Vice Chairman
Attest:



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     Rebecca R. Morris
     Secretary


                              TEXAS COMMERCE BANK 
                                NATIONAL ASSOCIATION



                              By         
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                                      Eric C. Lokker




STATE OF TEXAS      )
                    ) ss:
COUNTY OF DALLAS    )

     On the 6th day of August in the year one thousand nine hundred and 
ninety-six before me personally came B. D. St. John to me known who, being 
by me duly sworn, did depose and say that he is Vice Chairman of DRESSER 
INDUSTRIES, INC., one of the corporations described in and which executed the 
above instrument; that he knows the corporate 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.

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                                        Notary Public







STATE  OF TEXAS    )
                   ) ss:
COUNTY OF HARRIS   )

     On the 6th day of August in the year one thousand nine hundred and 
ninety-six before me personally came Eric C. Lokker to me known who, being by 
me duly sworn, did depose and say that he is ______________________ of TEXAS 
COMMERCE BANK NATIONAL ASSOCIATION, a national banking association and one 
of the entities described in and which executed the above instrument, and 
that he signed his name thereto by authority of the Board of Directors of 
said entity.

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                                        Notary Public