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                                  SCHEDULE 14A
                                 (RULE 14A-101)
 
                    INFORMATION REQUIRED IN PROXY STATEMENT
 
                            SCHEDULE 14A INFORMATION
 
          PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES
                EXCHANGE ACT OF 1934 (AMENDMENT NO.           )
 
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     Check the appropriate box:
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                                               Commission Only (as permitted by
                                               Rule 14a-6(e)(2))
     [ ] Definitive Proxy Statement
     [X] Definitive Additional Materials
     [ ] Soliciting Material Pursuant to sec. 240.14a-11(c) or sec. 240.14a-12
 
                          ENVIRODYNE INDUSTRIES, INC.
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                (Name of Registrant as Specified in its Charter)
 
                               ZAPATA CORPORATION
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    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
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     (3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee
is calculated and state how it was determined):
 
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     (4) Proposed maximum aggregate value of transaction:
 
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                   ZAPATA CORPORATION STRENGTHENS COMMITMENT
                     TO ACQUIRE ENVIRODYNE INDUSTRIES, INC.


HOUSTON, TX - MAY 15, 1997 - ZAPATA CORPORATION (NYSE:ZAP) announced today that
it has sent the following letter to Mr. F. Edward Gustafson, Chairman of the
Board, Chief Executive Officer and President of Envirodyne Industries, Inc.:

         Dear Mr. Gustafson:

         To allay any concern that Zapata would not proceed with its proposal
         conveyed to you yesterday for a merger in which stockholders of
         Envirodyne would receive consideration valued at $8 per share, Zapata
         undertakes that if Zapata should withdraw its proposal at any time
         prior to November 15, 1997 (which Zapata does not intend to do if its
         slate of directors is elected at tomorrow's meeting), one of Zapata's
         designees on the board of directors of Envirodyne would resign, and
         Zapata's remaining designees on the board would vote in favor of a
         replacement director designated by the directors not affiliated with
         Zapata.

         Sincerely,


         Avram A. Glazer

Avram A. Glazer, Chief Executive Officer and President of Zapata, said, "We
believe this commitment should demonstrate that Zapata is serious about its
proposal to acquire Envirodyne."


Contact:  Joseph L. von Rosenberg, III, Executive Vice President
          (713) 940-6100/Fax: (713) 940-6122