THERMEDICS INC
S-3, 1996-04-02
ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES
Previous: PATHE COMMUNICATIONS CORP, NT 10-K, 1996-04-02
Next: BIO TECHNOLOGY GENERAL CORP, 10-K/A, 1996-04-02









                   As filed with the Securities and Exchange 
                          Commission on March 29, 1996
                                               Registration No. 333-_____
                                                                         

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549
                               __________________

                                    FORM S-3 
                             Registration Statement
                                      Under
                           The Securities Act of 1933
                               __________________

                                 THERMEDICS INC.
             (Exact name of registrant as specified in its charter)

                               ------------------

              Massachusetts                                04-2788806
        (State or other jurisdiction of                (I.R.S. Employer
        incorporation or organization)                Identification No.)

                               ------------------

                               470 Wildwood Street
                                 P. O. Box 2999
                        Woburn, Massachusetts  01888-1799
                                 (617) 938-3786
          Address, including zip code, and telephone number, including
            area code, of registrant's principal executive offices) 
                               __________________

                          Sandra L. Lambert, Secretary
                                 Thermedics Inc.
                         c/o Thermo Electron Corporation
                                 81 Wyman Street
                                 P. O. Box 9046
                             Waltham, MA  02254-9046
                                 (617) 622-1000
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                   Copies to:
                           Seth H. Hoogasian, Esquire
                                 General Counsel
                                 Thermedics Inc.
                         c/o Thermo Electron Corporation
                                 81 Wyman Street
                       Waltham, Massachusetts 02254-9046 
                              ______________________

             Approximate date of commencement of proposed sale to the
        public:  As soon as practicable after the Registration Statement
        has become effective.
PAGE
<PAGE>






             If the only securities being registered on this form are
        being offered pursuant to dividend or interest reinvestment
        plans, please check the following box.  [   ]

             If any of the securities being registered on this form are
        to be offered on a delayed or continuous basis pursuant to Rule
        415 under the Securities Act of 1933, other than securities
        offered only in connection with dividend or interest reinvestment
        plans, please check the following box.   [ x ]  

                               __________________

                         CALCULATION OF REGISTRATION FEE

                                   Proposed
          Title of                  Maximum     Proposed
         securities     Amount     Offering     Maximum      Amount of
            to be        to be     Price Per   Aggregate    Registration
         registered   registered     Share   Offering Price     Fee

        Common Stock,
          $.10 par      394,928                                   
          value per     shares     $28 3/16  $11,132,033(1)  $3,839 (1)
           share                      (1)

        (1)  Estimated solely for the purpose of calculating the amount
             of the registration fee pursuant to Rule 457(c) based on the
             average of the high and low sales prices of the Common Stock
             on the American Stock Exchange on March 27, 1996.


                            -------------------------


             THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON
        SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE
        DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH
        SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL
        THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
        THE SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT
        SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING
        PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.








        PROSPECTUS

                                 394,928 Shares
PAGE
<PAGE>





                                 THERMEDICS INC.

                                  Common Stock

             This Prospectus relates to 394,928 shares (the "Shares") of
        Common Stock, par value $.10 per share (the "Common Stock"), of
        Thermedics Inc. (the "Company").  The Shares may be offered by
        the Thermo Electron Corporation Employees Stock Ownership Plan
        and Trust (the "Selling Shareholder" or the "Plan"), a profit
        sharing plan qualified under Section 401(a) of the Internal
        Revenue Code of 1986, as amended (the "Code"), from time to time
        in transactions on the American Stock Exchange, in negotiated
        transactions, through the writing of options on the Shares, or a
        combination of such methods of sale, at fixed prices that may be
        changed, at market prices prevailing at the time of sale, at
        prices related to such prevailing market prices or at negotiated
        prices.  The Selling Shareholder may effect such transactions by
        selling the Shares to or through broker-dealers, and such
        broker-dealers may receive compensation in the form of discounts,
        concessions or commissions from the Selling Shareholder and/or
        the purchasers of the Shares for whom such broker-dealers may act
        as agent or to whom they sell as principal, or both (which
        compensation to a particular broker-dealer might be in excess of
        customary commissions).  Alternatively, the Selling Shareholder
        may distribute some or all of the Shares to participants in the
        Plan who elect to receive distributions in kind upon the
        termination of the Plan.  Shares not so sold or distributed may
        be transferred to a successor plan qualified under Section 401(a)
        of the Code.  The Selling Shareholder and any broker-dealer who
        acts in connection with the sales of Shares hereunder may be
        deemed to be "underwriters" as that term is defined in the
        Securities Act of 1933, as amended (the "Securities Act"), and
        any commissions received by them and profit on any resale of the
        Shares as principal might be deemed to be underwriting discounts
        and commissions under the Securities Act.  The Shares were
        originally acquired by the Selling Shareholder in open market
        transactions or in the form of contributions from the Company or
        from Thermo Electron Corporation, which owns a majority of the
        Company's outstanding capital stock ("Thermo Electron").  See
        "Selling Shareholder."
                                  _____________

          THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
           COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION 
            OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCU-
               RACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESEN-
                  TATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                  _____________


             None of the proceeds from the sale of the Shares by the
        Selling Shareholder will be received by the Company.  The Company
PAGE
<PAGE>





        has agreed to bear all expenses (other than underwriting
        discounts and selling commissions, and fees and expenses of
        counsel or other advisers to the Selling Shareholder) in
        connection with the registration and sale of the Shares being
        registered hereby.  The Company has agreed to indemnify the
        Selling Shareholder against certain liabilities, including
        liabilities under the Securities Act as underwriters or
        otherwise.


        __________, 1996 

                                  _____________


             No dealer, salesman or other person has been authorized to
        give any information or to make any representations other than
        those contained or incorporated by reference in this Prospectus
        regarding the Company or the offering made by this Prospectus,
        and, if given or made, such information or representations must
        not be relied upon as having been authorized by the Company or by
        any other person.  All information contained in this Prospectus
        is as of the date of this Prospectus.  Neither the delivery of
        this Prospectus nor any sale or distribution and resale made
        hereunder shall, under any circumstances, create any implication
        that there has been no change in the affairs of the Company since
        the date hereof.  This Prospectus does not constitute an offer to
        sell or a solicitation of any offer to buy any security other
        than the securities covered by this Prospectus, nor does it
        constitute an offer to or solicitation of any person in any
        jurisdiction in which such offer or solicitation may not be
        lawfully made.

                                  _____________


                              AVAILABLE INFORMATION

             The Company is subject to the informational requirements of
        the Securities Exchange Act of 1934, as amended (the "Exchange
        Act"), and in accordance therewith files reports, proxy
        statements and other information with the Securities and Exchange
        Commission (the "Commission").  Such reports, proxy statements
        and other information can be inspected and copied at the public
        reference facilities maintained by the Commission at 450 Fifth
        Street, N.W., Washington, D.C. 20549, and at the following
        Regional Offices of the Commission:  500 West Madison Street,
        Suite 1400, Chicago, Illinois 60661, and 7 World Trade Center,
        Suite 1300, New York, New York 10048.  Copies of such material
        can also be obtained from the Public Reference Section of the
        Commission at 450 Fifth Street, N.W., Washington, D.C. 20549 at
        prescribed rates.  The Common Stock of the Company is listed on
        the American Stock Exchange, and the reports, proxy statements
        and other information filed by the Company with the Commission

                                        2
PAGE
<PAGE>





        can be inspected at the offices of the American Stock Exchange,
        86 Trinity Place, New York, New York  10006.

             This Prospectus, which constitutes part of a Registration
        Statement filed by the Company with the Commission under the
        Securities Act, omits certain of the information contained in the
        Registration Statement.  Reference is hereby made to the
        Registration Statement and to the exhibits relating thereto for
        further information with respect to the Company and the Shares
        offered hereby.  Statements contained herein concerning
        provisions of documents are necessarily summaries of such
        documents, and each statement is qualified in its entirety by
        reference to the applicable document filed with the Commission.

             The Company undertakes to provide without charge to each
        person to whom a copy of this Prospectus has been delivered, on
        the written or oral request of such person, a copy of any or all
        of the documents that have been or may be incorporated in this
        Prospectus by reference, other than exhibits to such documents
        (unless such exhibits are specifically incorporated by reference
        therein).  Requests for such copies should be directed to:
        Sandra L. Lambert, Clerk, Thermedics Inc., 81 Wyman Street, P. O.
        Box 9046, Waltham, Massachusetts 02254-9046 (telephone number:
        (617) 622-1000).


                                   THE COMPANY

             The businesses of the Company are divided into two segments:
        Instruments and Other Equipment, and Biomedical Products.  

             The Company's Instruments and Other Equipment segment
        includes Thermo Sentron Inc. ("Thermo Sentron"), a newly formed
        subsidiary of the Company.  On January 2, 1996, the Company
        transferred to Thermo Sentron the assets, liabilities and
        business of Ramsey Technology, Inc., which was acquired in March
        1994, for 7,000,000 shares of Thermo Sentron common stock. Thermo
        Sentron designs, develops, manufactures, and sells high-speed
        precision weighing and inspection equipment for industrial
        production and packaging lines.  On March 27, 1996, Thermo
        Sentron commenced an initial public offering of shares of common
        stock.  The Company owns approximatley 74% of Thermo Sentron.  

             Also part of the Instruments and Other Equipment segment is
        the Orion laboratory products division ("Orion") of Analytical
        Technology, Inc., which the Company acquired in December 1995 for
        approximately $52.7 million in cash, which included the repayment
        of $8.6 million of debt, subject to a post-closing adjustment.
        To partially finance this acquisition, the Company borrowed $38.0
        million from Thermo Electron pursuant to a promissory note due
        December 1996.  The balance of the purchase price was funded from
        the Company's working capital.  Orion is a manufacturer of
        electrochemistry, microweighing, process and other instruments
        used to analyze the chemical compositions of foods, beverages,

                                        3
PAGE
<PAGE>





        and pharmaceuticals and detect contaminants in environmental and
        high-purity water samples.  

             Through its Thermedics Detection Inc. ("Thermedics
        Detection") subsidiary, the Company also develops, manufactures,
        and markets high-speed detection instruments, including the
        Alexus(R) system, a process detection instrument used in product
        quality assurance applications, and the EGIS(R) system, a
        security instrument used to detect explosives at airports and
        other locations.  In January 1996, Thermedics Detection acquired
        the assets of Moisture Systems Corporation and certain affiliated
        companies (collectively, "MSC"), and the stock of Rutter & Co.
        ("Rutter") for a total of $20.5 million in cash and the
        assumption of certain liabilities.  MSC and Rutter design,
        manufacture, and sell instruments which use near infrared
        radiation to measure moisture for protein and other product
        components in the manufacturing process for the food,
        pharmaceutical, chemical, wood, pulp, paper, and other
        industries.  

             Through the Company's Thermo Voltek Corp. subsidiary, the
        Instruments and Other Equipment segment manufactures a line of
        electronic test instruments and high-voltage power conversion
        systems.

             As part of its Biomedical Products segment, the Company's
        Thermo Cardiosystems Inc. subsidiary has developed two
        implantable left ventricular-assist systems ("LVAS"): an
        implantable pneumatic, or air-driven system, and an electric
        version.  In October 1994, the Company announced that the U.S.
        Food and Drug Administration granted approval for the commercial
        sale of the air-driven LVAS for use as a bridge-to-transplant.
        With this approval, the air-driven system became available for
        sale to cardiac centers throughout the U.S.  The Company also
        develops, manufactures, and markets enteral nutrition-delivery
        systems and a line of medical-grade polymers used in medical
        disposables and nonmedical, industrial applications, including
        safety glass and automotive coatings.

             The Company is a majority-owned, publicly traded subsidiary
        of Thermo Electron.  As of December 30, 1995, Thermo Electron
        owned 17,315,326 shares of the Common Stock of the Company,
        representing approximately 51% of such Common Stock outstanding.
        The Company's principal executive offices are located at 470
        Wildwood Street, P. O. Box 2999, Woburn, Massachusetts
        01888-1799, and its telephone number is (617) 938-3786. 




                               SELLING SHAREHOLDER

             The following table sets forth the name of the Selling
        Shareholder, the number of shares of Common Stock owned by the

                                        4
PAGE
<PAGE>





        Selling Shareholder, the number of Shares that may be offered by
        the Selling Shareholder pursuant to this Prospectus, and the
        number of Shares the Selling Shareholder will own after
        completion of the offering, assuming all of the Shares being
        offered hereby are sold. 

                                    Shares of
                                      Common                   Shares
                                      Stock                     Owned
                                      Owned                     After
                                     Prior to     Shares     Completion
            Selling Shareholder        the         Being       of the
            -------------------
                                     Offering     Offered     Offering
                                     --------     -------     --------


             Thermo Electron
             Corporation Employees   394,928      394,928         0
             Stock Ownership Plan
             and Trust

        __________________

             (1)  Certain officers and directors of the Company and/or of
                  Thermo Electron are trustees of the Selling
                  Shareholder.

             The Shares are being registered to permit the sale of the
        Shares by the Selling Shareholder to the public.  All of the
        Shares being offered by the Selling Shareholder were originally
        acquired by the Selling Shareholder in open market transactions
        or in the form of contributions from the Company or from Thermo
        Electron.  The Selling Shareholder is selling the Shares in
        connection with the liquidation and termination of the Plan in
        order to repay loans made to the Plan by Thermo Electron and to
        distribute the remaining proceeds to beneficiaries of the Plan.
        Thermo Electron has agreed to bear all expenses (other than
        underwriting discounts, selling commissions, and fees and
        expenses of counsel and other advisors to the Selling
        Shareholder) in connection with the registration and sale of the
        Shares being offered by the Selling Shareholder.  See "Sale of
        Shares."  The Company has agreed to prepare and file such
        amendments and supplements to the Registration Statement of which
        this Prospectus forms a part as may be necessary to keep the
        Registration Statement effective until all the Shares registered
        thereunder have been sold pursuant thereto or until, by reason of
        Rule 144(k) of the Commission under the Securities Act or any
        other rule of similar effect, the Shares are no longer required
        to be registered for the sale thereof by the Selling Shareholder.


                                 SALE OF SHARES

             The Company has been advised that the Selling Shareholder
        may sell Shares from time to time in transactions on the American

                                        5
PAGE
<PAGE>





        Stock Exchange, in negotiated transactions, through the writing
        of options on the Shares, or a combination of such methods of
        sale, at fixed prices which may be changed, at market prices
        prevailing at the time of sale, at prices related to such
        prevailing market price or at negotiated prices.  The Selling
        Shareholder may effect such transactions by selling the Shares to
        or through broker-dealers, and such broker-dealers may receive
        compensation in the form of discounts, concessions or commissions
        from the Selling Shareholder and/or the purchasers of the Shares
        for whom such broker-dealers may act as agent or to whom they
        sell as principal, or both (which compensation to a particular
        broker-dealer might be in excess of customary commissions).
        Alternatively, the Selling Shareholder may distribute some or all
        of the Shares to participants in the Plan who elect to receive
        distributions in kind upon the termination of the Plan.  Shares
        not so sold or distributed may be transferred to a successor plan
        qualified under Section 401(a) of the Code.  

             The Selling Shareholder and any broker-dealers who act in
        connection with the sale of Shares hereunder may be deemed to be
        "underwriters" as that term is defined in the Securities Act, and
        any commissions received by them and profit on any resale of the
        Shares as principal might be deemed to be underwriting discounts
        and commissions under the Securities Act.  The Company has agreed
        to indemnify the Selling Shareholder against certain liabilities,
        including liabilities under the Securities Act as underwriters or
        otherwise.


                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

             The following documents previously filed with the Commission
        are incorporated in this Prospectus by reference:

             (1)  The Company's Annual Report on Form 10-K for the year
                  ended December 30, 1995.

             (2)  The Company's Current Report on Form 8-K filed with the
                  Commission on December 12, 1995 with respect to events
                  occurring on December 1, 1995, as amended.

             (3)  The description of the Common Stock which is contained
                  in the Company's Registration Statement on Form 8-A,
                  filed under the Exchange Act, as amended.

                  All reports or proxy statements filed by the Company
        pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange
        Act subsequent to the date of this Prospectus and prior to the
        termination of the offering made hereby shall be deemed to be
        incorporated by reference in this Prospectus and to be a part
        hereof from the respective dates of filing such documents.  Any
        statement contained in a document incorporated or deemed to be
        incorporated by reference herein shall be deemed to be modified
        or superseded for purposes of this Prospectus to the extent that

                                        6
PAGE
<PAGE>





        a statement contained herein modifies, supersedes or replaces
        that statement.  Any statement so modified or superseded shall
        not be deemed, except as so modified or superseded, to constitute
        a part of this Prospectus.


                                  LEGAL MATTERS

             The validity of the Common Stock offered hereby has been
        passed upon by Seth H. Hoogasian, Esq., General Counsel of the
        Company.  Mr. Hoogasian owns or has the right to acquire,
        pursuant to the exercise of stock options, shares of the Common
        Stock of the Company and of certain of the Company's
        subsidiaries, the fair market value of which exceeds $50,000.


                                     EXPERTS

             The financial statements and schedule of the Company for the
        year ended December 30, 1995, incorporated in this Prospectus by
        reference to the Company's Annual Report on Form 10-K for the
        year ended December 30, 1995 have been audited by Arthur Andersen
        LLP, independent public accountants, to the extent and for the
        periods as indicated in their reports with respect thereto, and
        are incorporated herein in reliance upon the authority of said
        firm as experts in giving said reports.  

             The financial statements of the Orion Lab Products Division
        of Analytical Technology, Inc.for the year ended December 31,
        1994, incorporated in this Prospectus by reference to the
        Company's Current Report on Form 8-K, as amended, dated December
        1, 1995 have been audited by Arthur Andersen LLP, independent
        public accountants, to the extent and for the periods as
        indicated in their report with respect thereto, and are
        incorporated herein in reliance upon the authority of said firm
        as experts in giving said report.



















                                        7
PAGE
<PAGE>





                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

             Item 14.  Other Expenses of Issuance and Distribution.

             The expenses incurred by the Company in connection with the
        issuance and distribution of the securities being registered are
        as follows.  All amounts are estimated except the Securities and
        Exchange Commission registration fee.                            
                                
                                                              Amount
                                                              ------

             Registration fee - Securities and Exchange
             Commission ...................................$    3,839
             Legal fees and expenses ......................     1,000
             Accounting fees and expenses .................     2,000

             Miscellaneous ................................     1,000
                  Total ...................................$    7,839

             Item 15.  Indemnification of Directors and Officers. 

             The Massachusetts Business Corporation Law and the Company's
        Articles of Organization and By-Laws limit the monetary liability
        of directors to the Company and to its stockholders and provide
        for indemnification of the Company's officers and directors for
        liabilities and expenses that they may incur in such capacities.
        In general, officers and directors are indemnified with respect
        to actions taken in good faith in a manner reasonably believed to
        be in, or not opposed to, the best interests of the Company, and
        with respect to any criminal action or proceeding, actions that
        the indemnitee had no reasonable cause to believe were unlawful.
        The Company also has indemnification agreements with its
        directors and officers that provide for the maximum
        indemnification allowed by law. 

             Thermo Electron Corporation has an insurance policy which
        insures the directors and officers of Thermo Electron and its
        subsidiaries, including the Company, against certain liabilities
        which might be incurred in connection with the performance of
        their duties.


             Item 16.  Exhibits and Financial Statement Schedules.

             See the Exhibit Index included immediately preceding the
        exhibits to this Registration Statement.


             Item 17.  Undertakings.

             (a)  The undersigned Registrant hereby undertakes:


                                        8
PAGE
<PAGE>






                   (1) To file, during any period in which offers or
                       sales are being made, a post-effective amendment
                       to this registration statement:

                       (i)  To include any prospectus required by Section
                            10(a)(3) of the Securities Act of 1933;

                       (ii) To reflect in the prospectus any facts or
                            events arising after the effective date of
                            the registration statement (or the most
                            recent post-effective amendment thereof)
                            which, individually or in the aggregate,
                            represent a fundamental change in the
                            information set forth in the registration
                            statement.  Notwithstanding the foregoing,
                            any increase or decrease in volume of
                            securities offered (if the total dollar value
                            of securities offered would not exceed that
                            which was registered) and any deviation from
                            the low or high end of the estimated maximum
                            offering range may be reflected in the form
                            of prospectus filed with the Commission
                            pursuant to Rule 424(b) if, in the aggregate,
                            the changes in volume and price represent no
                            more than 20 percent change in the maximum
                            aggregate offering price set forth in the
                            "Calculation of Registration Fee" table in
                            the effective registration statement;

                       (iii)To include any material information with
                            respect to the plan of distribution not
                            previously disclosed in the registration
                            statement or any material change to such
                            information in the registration statement.

                            Provided, however, that paragraphs (a)(1)(i)
                       and (a)(1)(ii) do not apply if the registration
                       statement is on Form S-3 or Form S-8, and the
                       information required to be included in a
                       post-effective amendment by those paragraphs is
                       contained in periodic reports filed by the
                       Registrant pursuant to Section 13 or Section 15(d)
                       of the Securities Exchange Act of 1934 that are
                       incorporated by reference in the registration
                       statement.

                  (2)  That, for the purpose of determining any liability
                       under the Securities Act of 1933, each such
                       post-effective amendment shall be deemed to be a
                       new registration statement relating to the
                       securities offered therein, and the offering of
                       such securities at that time shall be deemed to be
                       the initial bona fide offering thereof.

                                        9
PAGE
<PAGE>






                  (3)  To remove from registration by means of a
                       post-effective amendment any of the securities
                       being registered which remain unsold at the
                       termination of the offering.

             (b)  The undersigned Registrant hereby undertakes that, for
        purposes of determining any liability under the Securities Act of
        1933, each filing of the Registrant's annual report pursuant to
        Section 13(a) or Section 15(d) of the Securities Exchange Act of
        1934 that is incorporated by reference in this registration
        statement shall be deemed to be a new registration statement
        relating to the securities offered herein, and the offering of
        such securities at that time shall be deemed to be the initial
        bona fide offering thereof.

             (c)  Insofar as indemnification for liabilities arising
        under the Securities Act of 1933 may be permitted to directors,
        officers and controlling persons of the Registrant pursuant to
        the foregoing provisions, or otherwise, the Registrant has been
        advised that in the opinion of the Securities and Exchange
        Commission such indemnification is against public policy as
        expressed in the Act and is, therefore, unenforceable.  In the
        event that a claim for indemnification against such liabilities
        (other than the payment by the Registrant of expenses incurred or
        paid by a director, officer or controlling person of the
        Registrant in the successful defense of any action, suit or
        proceeding) is asserted by such director, officer or controlling
        person in connection with the securities being registered, the
        Registrant will, unless in the opinion of its counsel the matter
        has been settled by controlling precedent, submit to a court of
        appropriate jurisdiction the question whether such
        indemnification by it is against public policy as expressed in
        the Act and will be governed by the final adjudication of such
        issue.




















                                       10
PAGE
<PAGE>





                                   SIGNATURES

             Pursuant to the requirements of the Securities Act of 1933,
        the Registrant hereby certifies that it has reasonable grounds to
        believe that it meets all of the requirements for filing on Form
        S-3 and has duly caused this Registration Statement to be signed
        on its behalf by the undersigned, thereunto duly authorized, in
        the City of Waltham, Commonwealth of Massachusetts, on this 29th
        day of March, 1996.

                                      THERMEDICS INC.

                                      By:  John W. Wood, Jr.
                                           -----------------------------
                                           John W. Wood, Jr., President 
                                           and Chief Executive Officer

             KNOW ALL MEN BY THESE PRESENTS that each individual whose
        signature appears below constitutes and appoints John N.
        Hatsopoulos, Paul F. Kelleher, Seth H. Hoogasian, Sandra L.
        Lambert and Jonathan W. Painter, and each of them, as his true
        and lawful attorneys-in-fact and agents for the undersigned, with
        full power of substitution, for and in the name, place and stead
        of the undersigned, to sign and file with the Securities and
        Exchange Commission under the Securities Act of 1933 any and all
        amendments and exhibits to this Registration Statement and any
        and all applications and other documents to be filed with the
        Securities and Exchange Commission pertaining to the registration
        of the securities covered hereby, with full power and authority
        to do and perform any and all acts and things whatsoever
        requisite and necessary or desirable.

             Pursuant to the requirements of the Securities Act of 1933,
        this Registration Statement has been signed by the following
        persons in the capacities and on the dates indicated.


               Signature        Title
               ---------        -----
                                Title                      Date
- -                                                          ----
                                          


                               President, Chief
                               Executive 
        John W. Wood, Jr.      Officer and Director    March 29, 1996
        John W. Wood, Jr.

                               Vice President, Chief
                               Financial Officer and 
        John N. Hatsopoulos    Chairman of the Board   March 29, 1996

        John N. Hatsopoulos


                               Chief Accounting
        Paul F. Kelleher       Officer                 March 29, 1996


                                       11
PAGE
<PAGE>





               Signature        Title
               ---------        -----
                                                           Date
       ----                                                ----


        Paul F. Kelleher

        Peter O. Crisp         Director                March 29, 1996

        Peter O. Crisp


        Paul F. Ferrari        Director                March 29, 1996

        Paul F. Ferrari


        George N. Hatsopoulos  Director                March 29, 1996

        George N. Hatsopoulos


        Robert C. Howard       Director                March 29, 1996

        Robert C. Howard



        Arvin H. Smith         Director                March 29, 1996
        Arvin H. Smith



        Nicholas T. Zervas     Director                March 29, 1996
        Nicholas T. Zervas






















                                       12
PAGE
<PAGE>





                                  EXHIBIT INDEX


        Exhibit                                                        
        Sequential
        Number         Description of Exhibit                   Page No.
        ------         ----------------------                   --------

               
            5        Opinion of Seth H. Hoogasian, Esq.          

             23(a)    Consent of Arthur Andersen LLP 

               (b)    Consent of Arthur Andersen LLP  

               (c)    Consent of Seth H. Hoogasian, Esq.
                      (contained in Exhibit 5)

             24       Power of Attorney (See Signature Page)













































                                                                EXHIBIT 5



                                 THERMEDICS INC.
                               470 Wildwood Street
                        Woburn, Massachusetts  01888-1799

                                 March 29, 1996


        Thermedics Inc.
        470 Wildwood Street
        Woburn, Massachusetts  01888-1799

             Re:  Registration Statement on Form S-3

        Dear Sirs:

             I am General Counsel to Thermedics Inc., a Massachusetts
        corporation (the "Company"), and have acted as counsel in
        connection with the registration under the Securities Act of
        1933, as amended, on Form S-3 (the "Registration Statement"), of
        394,928 shares of the Company's Common Stock, $.10 par value per
        share (the "Shares"), which may from time to time be sold by a
        shareholder of the Company.

             I or a member of my staff  have reviewed the corporate
        proceedings taken by the Company with respect to the
        authorization of the issuance of the Shares.  I or a member of my
        staff have also examined and relied upon originals or copies,
        certified or otherwise authenticated to my satisfaction, of all
        corporate records, documents, agreements or other instruments of
        the Company, and have made investigations of law and have
        discussed with the Company's representatives questions of fact
        that I or a member of my staff have deemed necessary or
        appropriate.

             Based upon and subject to the foregoing, I am of the opinion
        that the Shares have been duly authorized by the Company and are
        validly issued, fully paid and non-assessable.

             I hereby consent to the filing of this opinion as Exhibit 5
        to the Registration Statement, including any amendments thereto,
        and to the use of my name under the caption "Legal Matters" in
        the prospectus constituting a part thereof.       

                                           Sincerely,



                                           Seth H. Hoogasian
                                           General Counsel








                                                            EXHIBIT 23(a)


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



        As independent public accountants, we hereby consent to the
        incorporation by reference in this registration statement of our
        reports dated February 7, 1996 (except with respect to the
        matters discussed in Note 15 as to which the date is February 9,
        1996) included in Thermedics Inc.'s Form 10-K for the year ended
        December 30, 1995 and to all references to our Firm included in
        this registration statement.



        ARTHUR ANDERSEN LLP

        Boston, Massachusetts  








                                                            EXHIBIT 23(b)


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



        As independent public accountants, we hereby consent to the
        incorporation by reference in this registration statement of our
        report dated January 8, 1996 included in Thermedics Inc.'s Form
        8-K/A for the Orion Lab Products Division of Analytical
        Technology, Inc. dated December 1, 1995 and to all references to
        our Firm included in this registration statement.



        ARTHUR ANDERSEN LLP

        Boston, Massachusetts  



© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission