EXHIBIT 99



                     THERMO PROCESS SYSTEMS CHANGES NAME TO
                                THERMO TERRATECH 


             WALTHAM, Mass., December 15, 1995 -- Shareholders of Thermo
        Process Systems Inc. (ASE-TPI) have approved the change of the
        company's name to Thermo TerraTech Inc.  The outcome of the vote
        was announced at the company's annual meeting on December 13,
        1995.  The name change reflects the company's new emphasis on
        environmental infrastructure services.  The ticker symbol on the
        American Stock Exchange has also been changed to TTT.  The new
        company name is effective immediately, while the use of TTT on
        the stock exchange will not commence until Monday, December 18,
        1995.  Shareholders will not be requested to exchange their stock
        certificates.

             Thermo TerraTech Inc. provides environmental services and
        infrastructure planning and design, encompassing a range of
        specializations within the consulting and design, soil and water
        remediation, laboratory testing, and metal-treating industries.
        Thermo TerraTech is a public subsidiary of Thermo Electron
        Corporation.

             For further information, contact Thermo Electron's Investor
        Relations Department at (617) 622-1111.


                                      # # #