SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                   ___________________________________________
                                    FORM 10-K
    (mark one)
    [ X ] Annual Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934 for the fiscal year ended September 28, 1996

    [   ] Transition Report Pursuant to Section 13 or 15(d) of the Securities
          Exchange Act of 1934

                         Commission file number 1-10791

                             THERMOTREX CORPORATION
             (Exact name of Registrant as specified in its charter)

    Delaware                                                       52-1711436
    (State or other jurisdiction of                          (I.R.S. Employer
    incorporation or organization)                        Identification No.)

    10455 Pacific Center Court
    San Diego, California                                          92121-4339
    (Address of principal executive offices)                       (Zip Code)
       Registrant's telephone number, including area code: (617) 622-1000

           Securities registered pursuant to Section 12(b) of the Act:

           Title of each class           Name of exchange on which registered
       ----------------------------      ------------------------------------
       Common Stock, $.01 par value            American Stock Exchange

           Securities registered pursuant to Section 12(g) of the Act:
                                      None

    Indicate by check mark whether the Registrant (1) has filed all reports
    required to be filed by Section 13 or 15(d) of the Securities Exchange
    Act of 1934 during the preceding 12 months, and (2) has been subject to
    the filing requirements for at least the past 90 days. Yes [ X ] No [   ]

    Indicate by check mark if disclosure of delinquent filers pursuant to
    Item 405 of Regulation S-K is not contained herein, and will not be
    contained, to the best of the Registrant's knowledge, in definitive proxy
    or information statements incorporated by reference into Part III of this
    Form 10-K or any amendment to this Form 10-K. [   ]

    The aggregate market value of the voting stock held by nonaffiliates of
    the Registrant as of November 22, 1996, was approximately $304,566,000.

    As of November 22, 1996, the Registrant had 19,170,568 shares of Common
    Stock outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE

    Portions of the Registrant's Annual Report to Shareholders for the fiscal
    year ended September 28, 1996, are incorporated by reference into Parts I
    and II.

    Portions of the Registrant's definitive Proxy Statement for the Annual
    Meeting of Shareholders to be held on March 12, 1997, are incorporated by
    reference into Part III.
PAGE

                                     PART I

    Item 1. Business

    (a)  General Development of Business

         ThermoTrex Corporation (the Company or the Registrant) has two
    publicly traded subsidiaries, 64%-owned ThermoLase Corporation
    (ThermoLase) and 80%-owned Trex Medical Corporation (Trex Medical).
    Through its ThermoLase subsidiary, the Company has developed a
    laser-based system for the removal of unwanted hair (the SoftLight(SM)
    system), which is being marketed in the U.S. through ThermoLase's Spa
    Thira salons and through licensing agreements with physicians, and in
    foreign countries through joint ventures and other licensing arrangements
    with companies or individuals that are experienced in those locations. In
    addition, ThermoLase's wholly owned CBI Laboratories, Inc. (CBI)
    subsidiary manufactures and markets skin-care and other personal-care
    products. Through its Trex Medical subsidiary, the Company designs,
    manufactures, and markets mammography and minimally invasive stereotactic
    breast-biopsy systems used for the detection of breast cancer, as well as
    general-purpose and specialty X-ray equipment. The Company also conducts
    advanced technology research in communications, avionics, X-ray
    detection, signal processing, advanced-materials technology, and lasers.

         In April 1995, ThermoLase received clearance from the U.S. Food and
    Drug Administration (FDA) to market services using the SoftLight system,
    and began earning revenue from the SoftLight system in the first quarter
    of fiscal 1996* as a result of opening its first commercial salon (Spa
    Thira) in La Jolla, California, in November 1995. ThermoLase opened
    additional salons in Dallas in June 1996, in Houston and Beverly Hills in
    September 1996, in Denver in October 1996, and in Boca Raton in November
    1996. ThermoLase also plans to open a spa in suburban Detroit in December
    1996 and has signed leases for four additional sites in Greenwich,
    Connecticut; Manhasset, New York; suburban Minneapolis; and Palm Beach,
    Florida. Lease negotiations are under way for additional sites.

         In January 1996, ThermoLase entered into a joint venture to market
    the SoftLight process in Japan, as well as its laser-based skin-
    rejuvenation process, if and when available. Before opening the first spa
    in Japan, the joint venture must obtain Japanese regulatory clearance to
    market the SoftLight process, for which it is presently conducting
    clinical studies to obtain data to submit to the appropriate Japanese
    regulatory authorities. ThermoLase currently holds a 50% stake in the
    joint venture, with an option to increase its ownership to 51% pursuant
    to a fair-value purchase option.

         In June 1996, ThermoLase initiated a program to license its
    SoftLight technology to doctors. In this program, ThermoLase licenses its
    technology to doctors and receives a per-procedure royalty that varies
    depending on the location treated.  ThermoLase also provides the doctors
    with the lasers and supplies that are necessary to perform the service. A
    total of 55 doctors were licensees as of December 1, 1996.



    * In September 1995, the Company changed its fiscal year end from the
      Saturday nearest December 31 to the Saturday nearest September 30.
      References to "fiscal 1996," "fiscal 1995," and "1994" herein are for
      the year ended September 28, 1996, the nine months ended September 30,
      1995, and the year ended December 31, 1994, respectively.
                                        2PAGE

         In June 1996, ThermoLase purchased $4.4 million of convertible
    preferred stock of AntiCancer Incorporated (AntiCancer), representing an
    approximate 10% equity interest on a fully diluted basis. San Diego-based
    AntiCancer is developing technology that may have the potential to
    enhance the effectiveness of the SoftLight process. In this technology,
    liposomes, which have been proven to be effective delivery agents in
    other applications, might provide a more efficient method of delivering
    carbon, which is the primary ingredient in the lotion used in the
    SoftLight process, to hair follicles. ThermoLase has signed an agreement
    to license this technology as it pertains not only to hair removal, but
    also to stimulation of hair growth, suppression of hair growth, and hair
    coloring.

         In November 1996, ThermoLase entered into a joint venture to market
    its SoftLight process in France, as well as its laser-based skin-
    rejuvenation process, if and when available. ThermoLase's partner in the
    joint venture is an affiliate of Groupe Jacques Dessange, which is a
    leading provider of premium hair- and skin-care services in France. The
    joint venture plans to open Spa Thira salons in France and to sublicense
    to French physicians and others the right to perform services using the
    SoftLight system.

         In November 1996, ThermoLase entered into a license agreement to
    allow a third party to market the SoftLight process in Saudi Arabia, as
    well as its laser-based skin-rejuvenation process, if and when available.

         ThermoLase is investigating other applications for its laser-based
    technology, and in June 1995 was granted a patent covering a laser-based
    skin-rejuvenation system, which ThermoLase believes may be used to remove
    the outer layers of dead skin cells. Carbon dioxide (CO2) lasers have
    recently been used to remove wrinkles, but their use has been associated
    with long healing times and, in some cases, undesirable side effects.
    ThermoLase believes that the skin-rejuvenation process that it is
    developing will cause less skin damage than existing laser skin
    treatments that use a CO2 laser. Although the safety of using lasers for
    skin treatments has been established by several systems that are already
    approved by the FDA for the removal of birthmarks and tattoos, ThermoLase
    may not commercially sell its skin-rejuvenation system, or services using
    the system, until it has received clearance from the FDA. ThermoLase is
    currently conducting clinical trials and plans to submit a 510(k)
    application containing clinical data by the end of the second quarter of
    fiscal 1997.

         In July 1996, the Company completed the public spinout of its Trex
    Medical subsidiary. Trex Medical issued 2,875,000 shares of its common
    stock in an initial public offering, and 871,832 shares of its common
    stock in a concurrent rights offering, for net proceeds of $49.1 million.

         Trex Medical, which was incorporated in September 1995, consists of
    four operating units: Lorad, Bennett X-Ray Corporation (Bennett), XRE
    Corporation (XRE), and Continental X-Ray Corporation (Continental). In
    September 1995, ThermoTrex acquired and subsequently transferred to Trex
    Medical all of the outstanding capital stock of Bennett; in May 1996,
    Trex Medical acquired substantially all of the assets and liabilities of
                                        3PAGE

    XRE for approximately $18.5 million in cash, net of cash acquired and
    including the repayment of debt; and in September 1996, Trex Medical
    acquired substantially all of the assets and liabilities of Continental
    for approximately $18.4 million in cash, net of cash acquired and
    including the repayment of debt.

         Each of Trex Medical's operating units specializes in manufacturing
    a particular type of imaging equipment for different market segments.
    Lorad, acquired by the Company in 1992 and transferred to Trex Medical in
    September 1995, manufactures and markets mammography and minimally
    invasive stereotactic breast-biopsy systems, which provide a
    cost-effective, less-invasive alternative to open surgery for the biopsy
    of suspicious breast lesions. Bennett's product line consists primarily
    of general-purpose X-ray equipment, but also includes mammography
    systems, a stereotactic breast-biopsy system, and X-ray units used by
    chiropractors and veterinarians. XRE manufactures and markets X-ray
    imaging systems used by interventional cardiologists in the diagnosis and
    treatment of blockages in coronary arteries and other vessels. XRE also
    manufactures electrophysiology products that aid doctors in diagnosing
    and treating cardiac arrhythmia. Continental manufactures and markets a
    broad line of general-purpose and specialty X-ray systems, including
    radiographic fluoroscopy (R/F) systems used to diagnose gastrointestinal
    disorders. Continental also manufactures electrophysiology products and
    mammography systems.

         Trex Medical is currently developing a full-breast digital
    mammography system that is intended to yield higher image quality, permit
    the enhancement of an X-ray image through software, and allow off-site
    analysis of the X-ray image. Trex Medical believes this technology may
    also provide better images of dense breast tissue, which is often found
    in younger women. Trex Medical is currently collecting clinical data to
    be submitted with its 510(k) application to the FDA, which must grant
    market clearance before this system can be sold commercially. Trex
    Medical has designed its new, high-end conventional mammography systems
    so that radiologists can upgrade to this digital technology when it
    becomes available. Trex Medical believes that the digital imaging
    technology being developed for this system may be adaptable to its
    general and specialized radiography systems, and will seek to develop
    applications in these markets. Trex Medical is also working on a more
    advanced version of its existing digital technology, which incorporates a
    flat-panel, direct-digital detector and could provide even more
    information for earlier diagnoses.

         The Company continues to focus on applying its core technologies to
    the development of new commercial products, including a passive microwave
    camera and a laser communication system called lasercom. The passive
    microwave camera could be used to enhance safety in aircraft navigation
    during low-visibility conditions and in certain security applications.
    The lasercom system could one day be used as a satellite-to-satellite
    communication system to transmit phone calls, faxes, and video
    teleconferences across the globe. The Company continues to perform
    substantial amounts of government-sponsored research and development.

         At September 28, 1996, Thermo Electron Corporation (Thermo
    Electron) owned 9,711,282 shares of the common stock of the Company,

                                        4PAGE

    representing 51% of such stock then outstanding. Thermo Electron is a
    world leader in environmental monitoring and analysis instruments,
    biomedical products such as heart-assist devices and mammography systems,
    papermaking and paper-recycling equipment, biomass electric power
    generation, and other specialized products and technologies. Thermo
    Electron also provides a range of services related to environmental
    quality.

         Thermo Electron intends for the foreseeable future to maintain at
    least 50% ownership of the Company. This will require the purchase by
    Thermo Electron of additional shares of Company common stock from time to
    time as the number of outstanding shares issued by the Company increases.
    These and any other purchases may be made either on the open market or
    directly from the Company. During fiscal 1996, Thermo Electron purchased
    50,000 shares of the Company's common stock in the open market for a
    total price of $1.8 million. See Note 6 to Consolidated Financial
    Statements in the Registrant's Fiscal 1996 Annual Report to Shareholders
    for a description of outstanding stock options.

    Forward-looking Statements

         Forward-looking statements within the meaning of Section 21E of the
    Securities Exchange Act of 1934, are made throughout this Annual Report
    on Form 10-K. These statements involve a number of risks and
    uncertainties, including those detailed under the caption "Forward-
    looking Statements" in the Registrant's Fiscal 1996 Annual Report to
    Shareholders incorporated herein by reference.

    (b)  Financial Information About Industry Segments

         The Company's business is divided into three industry segments:
    Medical Products manufactured by the Company's Trex Medical subsidiary,
    Personal-care Products and Services provided by the Company's ThermoLase
    subsidiary, and Advanced Technology Research. The principal products
    produced and services rendered by the Company in these three segments are
    described in detail below. (See "Principal Products and Services.")

         Financial information concerning the Company's industry segments is
    provided in Note 13 to Consolidated Financial Statements in the
    Registrant's Fiscal 1996 Annual Report to Shareholders and is
    incorporated herein by reference.

    (c)  Description of Business

         (i) Principal Products and Services

    Medical Products

         Through its Trex Medical subsidiary, the Company designs,
    manufactures, and markets mammography and minimally invasive stereotactic
    breast-biopsy systems used for the detection of breast cancer, as well as
    general-purpose and specialty X-ray equipment and radiographic
    fluoroscopy systems. Trex Medical sells its products through a worldwide
    network of more than 100 independent dealers and, to a lesser extent, on
                                        5PAGE

    a direct basis. In addition to manufacturing and marketing its own
    systems, the Company manufactures systems and system components as an OEM
    for other medical equipment companies such as United States Surgical
    Corporation (U.S. Surgical), the GE Medical Systems division of General
    Electric Company, Inc. (GE), the Philips Medical Systems North America
    Company subsidiary of Philips N.V. (Philips), and the Picker
    International, Inc. subsidiary of GEC, Inc. (Picker International).

    Mammography and Breast-biopsy Systems

         Trex Medical is the world's leading manufacturer of mammography
    equipment and minimally invasive breast-biopsy systems. Trex Medical's
    systems are differentiated on the basis of price and performance, with
    high-end models including the recently introduced Lorad M-IV and the
    Bennett Contour, which offers a patented tilt C-arm that permits the
    system to tilt toward, or away from, the patient to allow for imaging of
    a greater area of the breast. The M-IV incorporates the optional
    High-Transmission Cellular (HTC)(TM) grid, which reduces X-ray scattering
    while blocking fewer primary X-rays, resulting in higher-contrast images
    with lower radiation doses. The Company's lower-priced models include the
    Lorad M-III and the Bennett MF-150, which do not offer all of the
    features of the high-end models and are marketed to more cost-conscious
    consumers. In addition, the Company offers two mobile mammography
    systems.

         The Company currently has a prototype full-breast digital imaging
    mammography system and expects to submit data using this prototype to the
    FDA for clearance, which is required before the Company can commercially
    market it. The Company is currently developing a next-generation
    full-breast digital mammography system, which would replace the film with
    a solid-state detector capable of directly recording the X-ray image in
    an electronic format. The system is designed to substantially increase
    image contrast without a significant decrease in image resolution.

         Trex Medical also offers a variety of minimally invasive
    stereotactic breast-biopsy systems, designed to provide an alternative to
    surgical breast biopsies. Compared with open surgery, a stereotactic
    breast-biopsy procedure generally removes only a small tissue sample,
    resulting in minimal scarring, which can affect the accuracy of future
    mammograms, and is generally performed under local anesthetic on an
    outpatient basis, resulting in significantly lower cost. Recent studies
    indicate that stereotactic needle biopsy is equally effective compared
    with surgical biopsy in determining whether a suspicious lesion is
    malignant, and the typical cost of a stereotactic needle-biopsy procedure
    is approximately one third of the cost of a surgical biopsy. The Company
    offers a dedicated, prone table called the StereoGuide(R) and upright,
    add-on systems that can be attached to most of its mammography systems.
    Trex Medical's StereoGuide system is the subject of a lawsuit alleging
    infringement of a Fischer Imaging Corporation (Fischer) patent. See "Item
    3 - Legal Proceedings."

         Trex Medical offers a digital spot imaging option with all of its
    stereotactic breast-biopsy systems. Although not capable of imaging the
    entire breast, digital spot imagers are capable of capturing an area
    large enough to cover a suspicious lesion. The Company's digital spot
                                        6PAGE

    imaging systems can record and display an X-ray image in approximately 10
    seconds. Since the image is recorded in electronic format, a computer can
    quickly plot the location of the lesion and aim the needle gun once the
    lesion has been located with a cursor on the computer screen. A
    stereotactic breast-biopsy procedure using digital spot imaging can be
    performed in as short a time as 10 minutes, compared with a typical time
    of 45 minutes using a film-based system.

         The Company believes that demand in the market for mammography
    systems is driven primarily by technological innovation that result in
    better image quality. Although growth of the installed base has slowed,
    demand for new systems continues as older models are replaced with those
    offering technological innovations. In addition, Trex Medical believes
    that the market outside the United States will grow as more countries
    adopt mammography quality standards similar to those recently adopted in
    the United States. Trex Medical believes that the stereotactic
    breast-biopsy system market will grow as the procedure becomes more
    widely accepted by the medical community and as pressures to contain
    healthcare costs increase.

    General Radiography

         Trex Medical addresses the general radiography (X-ray) market
    through its Bennett and Continental subsidiaries. Bennett designs,
    manufactures, and markets office-based X-ray systems, which are basic
    systems generally used in medical outpatient facilities, such as doctors'
    offices and surgi-care centers. Bennett has focused on this segment of
    the market by providing low-cost, reliable systems. Bennett and
    Continental also design, manufacture, and market more sophisticated and
    expensive radiographic systems typically used in hospitals and clinics.
    In addition, Bennett manufactures and markets imaging systems designed
    specifically for chiropractors and veterinarians.

         The U.S. market for general X-ray systems is stable, and consists
    primarily of replacement sales as customers upgrade older equipment. Trex
    Medical believes that the international market is substantially larger
    than the U.S. market and that the installed base of systems is still
    growing, particularly in developing countries. Trex Medical has recently
    expanded its international sales efforts.

         Trex Medical offers two linear tomography systems: the Bennett
    BT-300 and the Continental Precision Movement Tomography (PMT)
    radiographic/tomographic system. In a linear tomography procedure, the
    X-ray tube sweeps over the patient in one direction with the film tray
    sweeping under the patient in the opposite direction. The resulting image
    provides an unobstructed view at a desired plane within the patient's
    body, of the kidneys, for example. The Company believes that for a number
    of applications its tomography systems may be a cost-effective
    alternative to computed tomography (CT) scanners.

         The Company believes digital imaging will have significant
    application in the general and specialized radiographic markets and that
    the technology it develops for its full-breast digital imaging system may
    be adaptable to these applications. In general X-ray applications, the
    Company believes digital imaging will produce better quality images and
                                        7PAGE

    reduce operating costs by eliminating the need for film, processing
    equipment, and chemicals. In addition, digital imaging will permit the
    electronic storage of images on magnetic or optical media, as well as the
    transmission of images to multiple locations. Furthermore, the Company
    believes digital imaging could make the image intensifiers, which are
    large and expensive components in certain imaging systems, obsolete.

    Cardiac Catheterization, Angiography, and Electrophysiology

         Through its XRE subsidiary, acquired in May 1996, Trex Medical
    designs, manufactures, and markets complete cardiac catheterization
    laboratories (also called cath labs) and positioners for cardiovascular
    imaging systems. XRE's imaging equipment is used in cath labs where
    angiography (examination of the blood vessels using X-rays following the
    injection of a radio-opaque contrast medium) is performed by an
    interventional cardiologist. The entire system is designed to provide
    real-time images of the heart and coronary arteries for physicians
    performing interventional procedures, such as a diagnostic angiogram or
    balloon angioplasty, which has become a common alternative to open-heart
    bypass surgery.

         Both XRE and Continental design, manufacture, and sell
    electrophysiology systems used in the diagnosis and treatment of cardiac
    arrhythmia, which is characterized by the sudden, erratic beating of the
    heart and can result in cardiac arrest.

    Radiographic Fluoroscopy Systems

         Through its Continental subsidiary, acquired in September 1996,
    Trex Medical designs, manufactures and markets R/F products. An R/F
    system is able to record dynamic events by capturing a series of images
    in a short period of time. For example, R/F systems are used for various
    gastrointestinal procedures to image the progress of a radio-opaque
    ingested solution (typically barium) through the digestive tract.
    Continental produces R/F systems that use advanced high-frequency
    generators that provide pulsed power, resulting in substantially reduced
    radiation exposure to the patient. Continental's R/F products include the
    new DigiSpot 2000, a high-speed digital imaging system that records the
    image in an electronic format, permitting the electronic storage of
    images on magnetic or optical media and the transmission of images to
    multiple locations with image quality comparable with film-based systems.

    Personal-care Products and Services

    Laser-based Hair Removal

         ThermoLase's patented SoftLight system uses a low-energy,
    dermatology laser in combination with a lotion that absorbs the laser's
    energy to disable hair follicles. Unlike electrolysis, the SoftLight
    system can disable numerous hair follicles at one time. As a result,
    ThermoLase believes that it will be able to address a larger market than
    electrolysis by offering hair removal from large areas, such as the legs.
    The lasers, which are similar to those used for tattoo and birthmark 
                                        8PAGE

    removal, are manufactured for ThermoLase by Trex Medical. The lotion is
    manufactured by ThermoLase's CBI Laboratories subsidiary.

         In a typical treatment, the area from which hair is to be removed
    is first waxed to open each hair duct. The lotion is then applied, and
    the area is scanned with the laser beam. The laser energy passes through
    the skin and is absorbed by the lotion that has penetrated the hair duct,
    causing the temperature of the lotion to increase to a level that
    disables the hair follicles. Each client typically has a series of
    treatments, for which each Spa Thira currently offers several pricing
    programs, including fixed fees for one or more treatments and fixed fees
    for treatments during specified time periods. ThermoLase continues to
    invest in research and development to improve the efficacy of the system
    and increase the length of time between treatments.

         In April 1995, ThermoLase received clearance from the FDA to market
    services using the SoftLight system, and began earning revenue from the
    SoftLight system in the first quarter of fiscal 1996 as a result of
    opening its first commercial salon (Spa Thira) in La Jolla, California,
    in November 1995. ThermoLase opened additional salons in Dallas in June
    1996, in Houston and Beverly Hills in September 1996, in Denver in
    October 1996, and in Boca Raton in November 1996. ThermoLase also plans
    to open a spa in suburban Detroit in December 1996, and has signed leases
    for four additional sites in Greenwich, Connecticut; Manhasset, New York;
    suburban Minneapolis; and Palm Beach, Florida. Lease negotiations are
    under way for additional sites.

         In June 1996, ThermoLase initiated a program to license its
    SoftLight technology to doctors. In this program, ThermoLase licenses its
    technology to doctors and receives a per-procedure royalty that varies
    depending on the location treated. ThermoLase also provides the doctors
    with the lasers and supplies that are necessary to perform the service. A
    total of 55 doctors were licensees as of December 1, 1996.

         In January 1996, ThermoLase entered into a joint venture to market
    the SoftLight process in Japan, as well as its laser-based skin-
    rejuvenation process, if and when available. Before opening the first spa
    in Japan, the joint venture must obtain Japanese regulatory clearance to
    market the SoftLight process, for which it is presently conducting
    clinical studies to obtain data to submit to the appropriate Japanese
    regulatory authorities. ThermoLase currently holds a 50% stake in the
    joint venture, with an option to increase its ownership to 51% pursuant
    to a fair-value purchase option. During fiscal 1996, ThermoLase received
    $2.0 million in minimum guaranteed payments in accordance with
    contractual terms. ThermoLase will receive $1.0 million in minimum
    guaranteed payments in fiscal 1997, subject to certain exceptions in the
    event the joint venture is unable to obtain patent protection in Japan on
    prescribed terms.

         In November 1996, ThermoLase entered into a joint venture to market
    its SoftLight process in France, as well as its laser-based skin-
    rejuvenation process, if and when available. The joint venture plans to
    open Spa Thira salons in France and to sublicense to French physicians
    and others the right to perform services using the SoftLight system.
    ThermoLase has committed to provide up to $5.0 million to fund working 
                                        9PAGE

    capital requirements of the joint venture in exchange for its 50% stake
    in the joint venture. ThermoLase's partner in the venture has also
    committed to fund up to $5.0 million in exchange for its 50% ownership.
    ThermoLase has licensed the technology to perform the SoftLight process
    to the joint venture, and will receive a royalty based on the joint
    venture's revenues.

         In November 1996, ThermoLase entered into a license agreement with
    a third party, which will market the SoftLight process through Spa Thira
    salons and sublicensing arrangements in Saudi Arabia, as well as its
    laser-based skin-rejuvenation process, if and when available. Pursuant to
    the agreement, ThermoLase will receive up-front fees totaling $1.0
    million over a two-year period and a fee based on revenues derived from
    SoftLight services.

         ThermoLase's existing and planned spas are designed to reflect the
    environment of a luxurious day spa. ThermoLase believes that the
    uniformity of its centers will foster brand recognition and facilitate
    the opening of new spas. ThermoLase advertises the SoftLight system
    through an advertising and public relations campaign focused on exposure
    in fashion and health magazines as well as the national news media.

    Skin-care and Other Personal-care Products

         In December 1993, ThermoLase acquired CBI, a designer, developer,
    manufacturer, and packager of high-quality personal-care products for
    sale to retailers under its own brand names and as a contract
    manufacturer under arrangements with third parties. CBI develops and
    manufactures most of its products using botanicals and herbal extracts,
    with no animal fats, chemical dyes, or artificial aromas. CBI has the
    facilities and personnel to develop new product formulations, design
    packaging layouts, mix and fill formulations, and package final products
    for distribution. CBI does not manufacture packaging such as containers
    and boxes, but contracts with third parties for these supplies. CBI has a
    portfolio of approximately 3,000 formulations, and may manufacture up to
    300 different products in a quarter.

         CBI divides its business into three primary groups: Salon, Custom
    Design, and Store Brands. The Salon group, which represents CBI's
    original business, develops and manufactures a line of products primarily
    sold directly by CBI to professional estheticians in skin-care salons and
    spas. The Custom Design group markets CBI's manufacturing and design
    services primarily to major retailers and multilevel marketing groups for
    custom design of private-label product lines. The Store Brands group
    markets complete proprietary product lines created by CBI, including
    product formulations, packaging, brand name, and promotional materials,
    which can be purchased by a customer for sale in its retail outlets as an
    exclusive product line.

         CBI's marketing and sales strategy varies by product line, but
    generally includes phone solicitations and local representatives. In
    addition, ThermoLase expects its network of Spa Thira salons and
    physicians' offices where SoftLight services are offered to provide a
    retail outlet for CBI's salon products. To support its marketing
    activities, CBI attends industry trade shows and advertises in major
    trade publications.
                                       10PAGE

    Advanced Technology Research

          The Company is currently focusing its advanced technology research
    efforts in the areas of communications, avionics, X-ray detection, signal
    processing, materials technology, and lasers. The Company has developed
    its expertise in these core technologies in connection with
    government-sponsored research and development.

    Passive Microwave Camera

         The Company is developing a passive microwave camera (PMC) to see
    objects hidden by fog and clouds and to see through certain opaque
    objects, such as building partitions. The Company's PMC could thus
    improve safety in aircraft navigation and provide enhanced surveillance
    capabilities.

         The Company's PMC is intended to combine the capabilities and
    advantages of infrared imaging and radar detection to form thermal images
    at microwave frequencies. Like infrared imaging, but unlike radar, the
    PMC will be a totally passive device that emits no radiation and can
    produce real-time video images during the day or night without the
    clutter typical of radar. Like radar, but unlike infrared imaging, the
    PMC will have the ability to see through fog, smoke, clouds, and some
    opaque objects. For example, microwave imaging devices have penetrated
    cloud cover to produce identifiable images of highways from helicopters.
    The Company's goal is that its PMC will achieve resolution of objects
    that are several feet, to several tens of feet, in size at a distance of
    one mile and that resolution will increase as distances decrease.

         The Company believes the largest potential application of the PMC
    would be the incorporation of the device into airplanes for use during
    takeoffs, landings, and taxiing in adverse weather conditions. The
    Company's PMC is subject to approval by the Federal Aviation
    Administration (FAA). The U.S. Army has provided approximately $6.0
    million in funding for PMC development over the last four years. In
    fiscal 1996, the U.S. Army Research Laboratory awarded ThermoTrex an
    additional $4.0 million contract to continue development. Under the
    previous funding, ThermoTrex built and field-tested a first-generation
    camera. The additional funding will be used to conduct further upgrades
    that are intended to improve performance and make the camera more user
    friendly. In addition, ThermoTrex is developing a flightworthy
    second-generation camera for in-flight testing. Because the Army is
    interested in the potential for using this system on unmanned aircraft,
    the Company plans to develop a new system architecture that is compatible
    with an unmanned vehicle, with the goal of producing very-high-resolution
    images from long distances.

         Under a two-year $1.7 million cooperative agreement announced in
    early 1995, the Company is developing a more compact version of the PMC
    for the National Aeronautics and Space Administration. Under the terms of
    this agreement, the Company will provide matching funds of $1.3 million
    and its subcontractor, Aerojet GenCorp., will contribute $0.8 million.
                                       11PAGE

    Laser Communication System (lasercom)

         The Company is developing a laser communication system called
    lasercom that could help ease the burden that data transmission is
    placing on existing communication systems. The commercial lasercom system
    envisioned by ThermoTrex would employ a constellation of low-earth-orbit
    satellites. The information being transmitted would be uplinked via radio
    waves to the closest satellite, then relayed via laser beams to
    intermediate satellites before being downlinked via radio waves near the
    recipient.

         Since 1989, the Company has developed lasercom under the
    sponsorship of The Ballistic Missile Defense Organization, which has
    provided funding totaling approximately $11.8 million through the end of
    fiscal 1996. The military would benefit from the speed and security that
    lasercom could provide. In September 1995, the Company successfully
    demonstrated the data transmission capability of the system when data
    were broadcast over a distance of almost 100 miles.

         In September 1996, the Company received a $4.9 million contract
    (with options for an additional $0.4 million) from the Defense Airborne
    Reconnaissance Office (DARO) for advanced development of the lasercom
    system for use on aircraft. Under this contract, the Company will apply
    its lasercom technology to develop a system that could be used on
    unmanned reconnaissance aircraft. Lasercom would provide a horizontal
    communications link to quickly transmit digitized images of the ground
    below the aircraft, for example, to another unmanned aircraft flying near
    a command post hundreds of miles away, where the information could be
    downlinked and analyzed. Under the contract, the Company is developing a
    fully functional prototype to be tested using small commercial jets.

    Other Projects

         The Company is developing a more advanced version of its existing
    digital medical imaging technology, which Trex Medical currently
    incorporates into certain of its mammography systems. This
    next-generation system would incorporate a flat-panel, direct-digital
    detector that could provide even more information for earlier diagnoses.
    This system is based on complementary metal oxide semiconductor (CMOS)
    technology. The CMOS system would "directly" detect the X-rays and
    convert them into digital information, as opposed to converting them into
    visible light first before being digitized, as is the case with the
    Company's current full-breast digital technology. Trex Medical has the
    right to license this technology as it pertains to certain medical
    applications. The Company is also exploring other nonmedical applications
    for this flat-panel direct-digital technology.

         The Company is currently working on government projects in several
    areas, including: (1) space surveillance -- Under an $8.0 million
    contract from the U.S. Air Force Phillips Laboratory that was awarded in
    1993, the Company is designing and building a system to produce
    high-resolution images of low-earth-orbit satellites. (2) ROBS (rapid
    optical beam steering) laser radar system -- ThermoTrex has developed and
    extensively tested the ROBS system over the last nine years, supported by
    more than $23 million in government funding. In fiscal 1996, the Company
                                       12PAGE

    received a three-year $8.8 million contract from the U.S. Naval Air
    Warfare Center at China Lake, California, to continue development of this
    system, which is designed to simultaneously track multiple, fast-moving
    airborne objects with extreme precision. In July 1996, the Company
    received a $5.9 million contract from the U.S. Army Missile Command to
    build a new version of ROBS to meet Army specifications.

         One of the Company's long-term research and development programs is
    the development of a Sonic CT(TM) (Computed Tomography) system that uses
    acoustic waves to form high-resolution images of breast tissue. The
    Company has deferred spending additional resources on Sonic CT at the
    present time, so that it may concentrate its resources more directly on
    its digital imaging research and development.

         (ii) New Products

         The Company's business includes the research and development of new
    products. (see "Principal Products and Services.")

         (iii) Raw Materials

         Raw materials, components, and supplies purchased by the Company
    are either available from a number of different suppliers or from
    alternative sources that could be developed without a material adverse
    effect on the Company. To date, the Company has experienced no
    difficulties in obtaining these materials.

         (iv) Patents, Licenses, and Trademarks

         The Company protects its intellectual property through patents,
    trademarks, and trade secrets, as appropriate. In addition to relying on
    patents, the Company protects some of its technology as trade secrets and
    uses trademarks in association with certain products. The Company also
    enters into licensing arrangements to acquire rights in technology.

         The technology underlying the SoftLight system, including all
    patents issued thereon, belongs to the Company by virtue of a license
    agreement executed in February 1993 between ThermoLase and the inventor
    of the system, which grants ThermoLase an irrevocable, exclusive,
    worldwide, perpetual license to the technology in exchange for a $0.1
    million commitment fee and a royalty equal to 0.25% of revenues generated
    from the sale or use of the SoftLight system through February 10, 2010.

         Patented inventions of the Company include certain mammography and
    other X-ray equipment, lasers, telescopes, high-power diamond switches,
    laser-radar devices, microwave cameras, a laser-based hair-removal
    process, a Sonic CT system, a wind-shear detector, and methods of
    producing composites and ultrafine particles. Patent applications are
    pending on certain mammography equipment, a passive microwave camera, and
    a free-space laser communication system.

         The Company is a defendant in certain patent litigation and has
    been notified that it allegedly infringes certain other technologies
    owned by third parties. See information under the heading "Intellectual
                                       13PAGE

    Property Rights, Uncertainties and Litigation" under the caption
    "Forward-looking Statements" in the Registrant's Fiscal 1996 Annual
    Report to Shareholders incorporated herein by reference.

         Several of the Company's patents were the result of research
    programs funded by the U.S. government. With the exception of a
    prohibition on disclosure of classified technology, the government does
    not impose significant restrictions on the Company's use of
    government-sponsored technology. The government retains a non-exclusive,
    royalty-free license to use technology developed under government
    contracts for government purposes, and could, in certain circumstances,
    transfer all commercial rights to technology to a third party if the
    Company does not pursue its development.

         (v) Seasonal Influences

         There are no significant seasonal influences on the Company's sales
    of products and services.

         (vi) Working Capital Requirements

         There are no special inventory requirements or credit terms
    extended to customers that would have a material adverse effect on the
    Company's working capital.

         (vii) Dependency on a Single Customer

         No single customer accounted for 10% or more of the Company's total
    revenues in fiscal 1996. Medical Products segment revenues from OEM sales
    of a modified design of Trex Medical's stereotactic prone breast-biopsy
    system to U.S. Surgical accounted for 11% of Medical Products segment
    revenues in fiscal 1996. No single customer accounted for more than 10%
    of the revenues of the Personal-care Products and Services segment.
    Advanced Technology Research segment revenues from U.S. government
    agencies accounted for 85% of that segment's revenues in fiscal 1996. The
    Company's Advanced Technology Research segment is heavily dependent on
    government funding through several agencies, and the loss of any of such
    agencies or customers would have a material adverse effect on this
    segment. 

         (viii) Backlog

         The backlog of firm orders for the Medical Products segment was
    $65.3 million as of September 28, 1996, compared with $45.4 million as of
    September 30, 1995. The backlog of firm orders for the Personal-care
    Products and Services segment was $5.5 million as of September 28, 1996,
    compared with $4.6 million as of September 30, 1995. The backlog of firm
    orders for the Advanced Technology Research segment was $17.9 million as
    of September 28, 1996, compared with $10.6 million as of September 30,
    1995. This backlog includes government contract orders that are firm but
    not yet funded of $1.6 million at September 30, 1995. The Company
    believes that substantially all of its fiscal 1996 backlog will be
    completed during fiscal 1997.
                                       14PAGE

         (ix) Government Contracts

         Less than 10% of the Company's total revenues in fiscal 1996 were
    derived from contracts or subcontracts with the federal government, which
    are subject to renegotiation of profits or termination. The Company does
    not have any knowledge of threatened or pending renegotiations or
    terminations.

         (x) Competition

    Medical Products

         The healthcare industry in general, and the market for imaging
    products in particular, is highly competitive. Trex Medical competes with
    a number of companies, many of which have substantially greater
    financial, marketing, and other resources than Trex Medical. Trex
    Medical's competitors include large companies such as GE, Philips, the
    Siemens Corporation subsidiary of Siemens AG (Siemens), Toshiba American
    Medical Systems, Inc. and Toshiba America MRI, Inc. (collectively,
    Toshiba), Shimadzu and Picker International, which compete in most
    diagnostic imaging modalities, including X-ray imaging. In addition, a
    significant portion of Trex Medical's sales are to U.S. Surgical, GE, and
    Philips through OEM arrangements. The products sold through such OEM
    agreements compete with those offered by Trex Medical and its independent
    dealers. Trex Medical competes in these markets primarily on the basis of
    product features, product performance, and reputation as well as price
    and service. Trex Medical believes that competition is likely to increase
    as a result of healthcare cost-containment pressures and the development
    of alternative diagnostic and interventional technologies.

    Personal-care Products and Services

         ThermoLase expects that, in the near term, the principal
    competitors relative to treatment using the SoftLight system will be
    electrolysis providers. The electrolysis market is characterized by many
    small practitioners. Although ThermoLase believes that it has a
    significant competitive advantage over electrolysis, it does not have the
    well-established network of client relationships that many electrologists
    have. In addition, a number of laser manufacturers have announced that
    they have filed applications with the FDA seeking to obtain clearance to
    market a laser for hair removal. Although, to date, none of these
    companies has been successful in obtaining such a clearance, a number of
    them are currently marketing substantially similar devices for
    indications other than hair removal. The Company believes that certain of
    these devices are being used "off-label" for hair removal by some
    physicians in the U.S. and are being marketed for hair removal in some
    foreign jurisdictions where regulatory clearance is not as stringent as
    it is in the United States. ThermoLase's products and services will also
    compete with other hair-removal products. If ThermoLase's technology is
    accepted by the general public, it expects that others will seek to
    develop similar technologies and products that may compete directly with
    the SoftLight system.
                                       15PAGE

         The professional skin-care and bath-and-body products markets are
    highly competitive. In selling its Salon product line, CBI competes with
    a number of small manufacturers and divisions of larger companies. The
    competition in this market is fragmented with no one competitor
    dominating the market. In the Custom Design and Store brands groups, CBI
    competes with numerous contract packaging companies that can prepare and
    package custom formulations for customers. Some of these competitors have
    substantially greater financial, marketing, and research and development
    resources than those of the Company. CBI competes in these markets by
    offering its customers an exclusive product line that the Company
    believes can generally be sold at a lower price but with higher margins
    than CBI's competitors.

    Advanced Technology Research

         The Company competes for its research and development programs
    principally on the basis of technological innovations. As government
    funding becomes more scarce, particularly for defense projects, the
    competition for such funding will become more intense. In addition, as
    the Company's programs move from the development stage to procurement of
    large-scale, electro-optical systems, competition is expected to develop
    and intensify. Some of the Company's competitors for research and
    development funding and procurement have substantially greater resources
    than those of the Company.

         As the Company develops commercial products, it expects to
    encounter competition from various sources, including companies that will
    have substantially greater technical, marketing, and financial resources
    than those of the Company. The Company believes that its overall success
    will depend primarily on its ability to continue to make technological
    advances.

         (xi) Research and Development

         During the year ended September 28, 1996, the nine months ended
    September 30, 1995, and the year ended December 31, 1994, the Company
    incurred approximately $24,986,000, $13,430,000, and $14,172,000,
    respectively, on internally sponsored research and development programs,
    and $10,278,000, $11,803,000, and $14,452,000, respectively, on research
    and development programs sponsored by others. Approximately 268
    professional employees were engaged full-time in research and development
    activities at September 28, 1996.

         (xii) Environmental Protection Regulations

         The Company believes that compliance with federal, state, and local
    environmental regulations will not have a material adverse effect on its
    capital expenditures, earnings, or competitive position. 

         (xiii) Number of Employees

         As of September 28, 1996, the Company had a total of 1,383
    employees.

    (d)  Financial Information about Exports by Domestic Operations

         Financial information about exports by domestic operations is
    summarized in Note 13 to Consolidated Financial Statements in the
                                       16PAGE

    Company's Fiscal 1996 Annual Report to Shareholders and is incorporated
    herein by reference.

    (e)  Executive Officers of the Registrant

                                    Present Title (Fiscal Year First
         Name                  Age  Became Executive Officer)
         ------------------------------------------------------------------

         Gary S. Weinstein     39   Chief Executive Officer (1996)
         Firooz Rufeh          59   President (1990)
         Dr. Kenneth Y. Tang   49   Senior Vice President (1990)
         Anthony J. Pellegrino 56   Senior Vice President (1992)
         John N. Hatsopoulos*  62   Vice President and Chief Financial
                                      Officer (1990)
         David A. Teitel       33   Vice President, Finance (1996)
         Dr. Brett Spivey      36   Vice President, Commercial Technology
                                      Development (1990)
         Hal Kirshner          55   President and Chief Executive Officer,
                                      Trex Medical Corporation (1992)
         Paul F. Kelleher      54   Chief Accounting Officer (1990)

         * John N. Hatsopoulos and George N. Hatsopoulos, a director of the
           Company, are brothers.

         Each executive officer serves until his successor is chosen or
    appointed by the Board of Directors and qualified, or until earlier
    resignation, death, or removal. All executive officers, except Messrs.
    Weinstein, Pellegrino, Teitel, and Kirshner, have held comparable
    positions for at least five years with the Company or Thermo Electron.
    Mr. Weinstein has been Chief Executive Officer of the Company since
    February 1996.  Prior to joining the Company, Mr. Weinstein held various
    positions at Lehman Brothers, including heading its global syndicate and
    equity capital market group from March 1995 until joining the Company.
    Mr. Pellegrino is the founder of Lorad and has been Chairman of Lorad
    since its inception in 1984. Mr. Teitel has been Vice President, Finance,
    of the Company since August 1996.  Prior to joining the Company, Mr.
    Teitel was Vice President, Finance, of Deknatel Snowden Pencer, Inc.
    (Deknatel), a manufacturer of specialty surgical products, from May 1995
    to August 1996, and was Director of Finance at Deknatel from August 1994
    to May 1995.  From August 1985 to August 1994, Mr. Teitel held various
    positions at Arthur Andersen LLP, a professional services firm. Mr.
    Kirshner has been President of Lorad since February 1991. Messrs.
    Hatsopoulos and Kelleher are full-time employees of Thermo Electron, but
    devote such time to the affairs of the Company as the Company's needs
    reasonably require.


    Item 2. Properties

         The location and general character of the Company's principal
    properties as of September 28, 1996, are as follows:

    Medical Products

         Trex Medical owns two office and manufacturing facilities: a 63,500
    square-foot facility in Danbury, Connecticut, and a 163,000 square-foot
    facility in Broadview, Illinois. Trex Medical leases a 120,000
                                       17PAGE

    square-foot office and manufacturing facility in Copiague, New York,
    under a lease expiring in 2005, and a 156,000 square-foot office and
    manufacturing facility in Littleton, Massachusetts, under a lease
    expiring in 2012. Trex Medical has entered into a lease for a new 60,000
    square-foot building to be constructed adjacent to its existing facility
    in Danbury, Connecticut. The lease will commence upon completion of the
    building, which is expected to occur in December 1996, and has a term of
    10 years.

    Personal-care Products and Services

         ThermoLase occupies approximately 213,000 square feet of office and
    manufacturing space in Carrollton, Texas, under a lease expiring in 2004,
    through its CBI subsidiary. ThermoLase also occupies approximately 43,000
    square feet of retail space in California, Texas, Colorado, and Florida
    for its Spa Thira salons, under leases expiring from 2000 through 2006. 

    Advanced Technology Research

         The Company currently leases 90,000 square feet of office,
    engineering, and laboratory space in San Diego under a lease expiring in
    2006. The Company also leases a 10,000 square-foot office and warehouse
    facility in San Diego as a tenant-at-will. 

         The Company believes that its facilities are in good condition and
    are suitable and adequate to meet current needs.


    Item 3. Legal Proceedings

         In April 1992, Fischer Imaging Corporation (Fischer) commenced a
    lawsuit in the United States District Court, District of Colorado,
    against Lorad, alleging that Lorad's prone breast-biopsy system infringes
    a Fischer patent on a precision mammographic needle-biopsy system. As of
    September 28, 1996, the Company had aggregate revenues of approximately
    $63.1 million from the sale of such systems. The suit requests a
    permanent injunction, treble damages, and attorneys' fees and expenses.
    If the Company is unsuccessful in defending this lawsuit, it may be
    enjoined from manufacturing and selling its StereoGuide system without a
    license from Fischer. No assurance can be given that the Company will be
    able to obtain such a license, if required, on commercially reasonable
    terms, if at all. In addition, the Company may be subject to damages for
    past infringement. No assurance can be given as to the amount that the
    Company may eventually be required to pay in expenses or in such damages.


    Item 4. Submission of Matters to a Vote of Security Holders

         Not applicable.

                                       18PAGE

                                     PART II

    Item 5. Market for Registrant's Common Equity and Related Stockholder
            Matters

         Information concerning the market and market price for the
    Registrant's Common Stock, $.01 par value, and dividend policy is
    included under the sections labeled "Common Stock Market Information" and
    "Dividend Policy" in the Registrant's Fiscal 1996 Annual Report to
    Shareholders and is incorporated herein by reference.


    Item 6. Selected Financial Data

         The information required under this item is included under the
    sections labeled "Selected Financial Information" and "Dividend Policy"
    in the Registrant's Fiscal 1996 Annual Report to Shareholders and is
    incorporated herein by reference.


    Item 7. Management's Discussion and Analysis of Financial Condition and
            Results of Operations

         The information required under this item is included under the
    heading "Management's Discussion and Analysis of Financial Condition and
    Results of Operations" in the Registrant's Fiscal 1996 Annual Report to
    Shareholders and is incorporated herein by reference.


    Item 8. Financial Statements and Supplementary Data

         The Registrant's Consolidated Financial Statements and
    Supplementary Data are included in the Registrant's Fiscal 1996 Annual
    Report to Shareholders and are incorporated herein by reference.


    Item 9. Changes in and Disagreements with Accountants on Accounting and
            Financial Disclosures

         Not applicable.




                                       19PAGE

                                    PART III

    Item 10. Directors and Executive Officers of the Registrant

         The information concerning directors required under this item is
    incorporated herein by reference from the material contained under the
    caption "Election of Directors" in the Registrant's definitive proxy
    statement to be filed with the Securities and Exchange Commission
    pursuant to Regulation 14A, not later than 120 days after the close of
    the fiscal year. The information concerning delinquent filers pursuant to
    Item 405 of Regulation S-K is incorporated herein by reference from the
    material contained under the heading "Section 16(a) Beneficial Ownership
    Reporting Compliance" under the caption "Stock Ownership" in the
    Registrant's definitive proxy statement to be filed with the Securities
    and Exchange Commission pursuant to Regulation 14A, not later than 120
    days after the close of the fiscal year.


    Item 11. Executive Compensation

         The information required under this item is incorporated herein by
    reference from the material contained under the caption "Executive
    Compensation" in the Registrant's definitive proxy statement to be filed
    with the Securities and Exchange Commission pursuant to Regulation 14A,
    not later than 120 days after the close of the fiscal year.


    Item 12. Security Ownership of Certain Beneficial Owners and Management

         The information required under this item is incorporated herein by
    reference from the material contained under the caption "Stock Ownership"
    in the Registrant's definitive proxy statement to be filed with the
    Securities and Exchange Commission pursuant to Regulation 14A, not later
    than 120 days after the close of the fiscal year.


    Item 13. Certain Relationships and Related Transactions

         The information required under this item is incorporated herein by
    reference from the material contained under the caption "Relationship
    with Affiliates" in the Registrant's definitive proxy statement to be
    filed with the Securities and Exchange Commission pursuant to Regulation
    14A, not later than 120 days after the close of the fiscal year.

                                       20PAGE

                                     PART IV


    Item 14. Exhibits, Financial Statement Schedules, and Reports on Form 8-K

    (a), (d) Financial Statements and Schedules

             (1)The consolidated financial statements set forth in the list
                below are filed as part of this Report.

             (2)The consolidated financial statement schedule set forth in
                the list below is filed as part of this Report.

             (3)Exhibits filed herewith or incorporated herein by reference
                are set forth in Item 14(c) below.

             List of Financial Statements and Schedules Referenced in this
             Item 14

             Information incorporated by reference from Exhibit 13 filed
             herewith:

                Consolidated Statement of Income
                Consolidated Balance Sheet
                Consolidated Statement of Cash Flows
                Consolidated Statement of Shareholders' Investment
                Notes to Consolidated Financial Statements
                Report of Independent Public Accountants

             Financial Statement Schedules filed herewith:

                Schedule II: Valuation and Qualifying Accounts

             All other schedules are omitted because they are not applicable
             or not required, or because the required information is shown
             either in the financial statements or in the notes thereto.

         (b) Reports on Form 8-K

             None.

         (c) Exhibits

             See Exhibit Index on the page immediately preceding exhibits.


                                       21PAGE

                                   SIGNATURES


         Pursuant to the requirements of Section 13 or 15(d) of the
    Securities Exchange Act of 1934, the Registrant has duly caused this
    report to be signed by the undersigned, thereunto duly authorized.

    Date: December 5, 1996        THERMOTREX CORPORATION


                                  By: Gary S. Weinstein
                                      ---------------------------------
                                      Gary S. Weinstein
                                      Chief Executive Officer

         Pursuant to the requirements of the Securities Exchange Act of
    1934, this report has been signed below by the following persons on
    behalf of the Registrant and in the capacities indicated, as of December
    5, 1996.

    Signature                           Title

    By: Gary S. Weinstein              Chief Executive Officer, Chairman
        -------------------------        of the Board, and Director
        Gary S. Weinstein                 

    By: John N. Hatsopoulos            Vice President, Chief Financial
        -------------------------         Officer, and Director
        John N. Hatsopoulos      

    By: Paul F. Kelleher               Chief Accounting Officer
        -------------------------
        Paul F. Kelleher

    By: Morton Collins                 Director
        -------------------------
        Morton Collins

    By: Peter O. Crisp                 Director
        -------------------------
        Peter O. Crisp

    By: Paul F. Ferrari                Director
        -------------------------
        Paul F. Ferrari

    By: Dr. George N. Hatsopoulos      Director
        -------------------------
        Dr. George N. Hatsopoulos

    By: Robert C. Howard               Director
        -------------------------
        Robert C. Howard

    By: Firooz Rufeh                   President and Director
        ------------------------
        Firooz Rufeh

    By: Nicholas T. Zervas             Director
        -------------------------
        Nicholas T. Zervas
                                       22PAGE

                    Report of Independent Public Accountants
                    ----------------------------------------


    To the Shareholders and Board of Directors of ThermoTrex Corporation:

         We have audited, in accordance with generally accepted auditing
    standards, the consolidated financial statements included in ThermoTrex
    Corporation's Annual Report to Shareholders incorporated by reference in
    this Form 10-K, and have issued our report thereon dated November 1,
    1996. Our audits were made for the purpose of forming an opinion on those
    statements taken as a whole. The schedule listed in Item 14 on page 21 is
    the responsibility of the company's management and is presented for
    purposes of complying with the Securities and Exchange Commission's rules
    and is not part of the basic consolidated financial statements. The
    schedule has been subjected to the auditing procedures applied in the
    audits of the basic consolidated financial statements and, in our
    opinion, fairly states in all material respects the consolidated
    financial data required to be set forth therein in relation to the basic
    consolidated financial statements taken as a whole.



                                                Arthur Andersen LLP



    Boston, Massachusetts
    November 1, 1996













                                       23PAGE


  SCHEDULE II

                             THERMOTREX CORPORATION

                        Valuation and Qualifying Accounts
                                 (In thousands)

                             Balance  Provision                        Balance
                                  at    Charged  Accounts                   at
                           Beginning         to   Written               End of
  Description              of Period    Expense       Off   Other (a)   Period
  ----------------------------------------------------------------------------
  Year Ended
    September 28, 1996

      Allowance for
        Doubtful Accounts     $1,141     $  336    $ (163)   $  272    $1,586

  Nine Months Ended
    September 30, 1995

      Allowance for
        Doubtful Accounts     $  643     $  178    $    -    $  320    $1,141

  Year Ended
    December 31, 1994

      Allowance for
        Doubtful Accounts     $  438     $  215    $  (10)   $    -    $  643

  (a) Allowances of businesses acquired during the year as described in Note 4
      to Consolidated Financial Statements in the Registrant's Fiscal 1996
      Annual Report to Shareholders.






                                       24PAGE

                                  EXHIBIT INDEX

    Exhibit
    Number     Description of Exhibit

      3.1      Restated Certificate of Incorporation, as amended (filed as
               Exhibit 3(i) to the Registrant's Quarterly Report on Form
               10-Q for the fiscal quarter ended July 2, 1994, [File No.
               1-10791] and incorporated herein by reference).

      3.2      By-Laws of the Registrant, as amended and restated (filed as
               Exhibit 3.2 to the Registrant's Transition Report on Form
               10-K for the transition period January 1, 1995, [File No. 
               1-10791] through September 30, 1995 and incorporated herein
               by reference).

     10.1      Asset Transfer Agreement dated December 29, 1990, between
               Thermo Electron Corporation and the Registrant (filed as
               Exhibit 10(a) to the Registrant's Registration Statement on
               Form S-1 [Reg. No. 33-40972] and incorporated herein by
               reference).

     10.2      Amended and Restated Corporate Services Agreement dated
               January 3, 1993, between Thermo Electron Corporation and the
               Registrant (filed as Exhibit 10(b) to the Registrant's Annual
               Report on Form 10-K for the fiscal year ended January 2, 1993
               [File No. 1-10791] and incorporated herein by reference).

     10.3      Form of Indemnification Agreement between the Registrant and
               its officers and directors (filed as Exhibit 10(f) to the
               Registrant's Registration Statement on Form S-1
               [Reg. No. 33-40972] and incorporated herein by reference).

     10.4      Thermo Electron Corporate Charter as amended and restated
               effective January 3, 1993 (filed as Exhibit 10(g) to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended January 2, 1993 [File No. 1-10791] and incorporated
               herein by reference).

     10.5      Stock Option Agreement granted to Anthony J. Pellegrino dated
               November 16, 1992 (filed as Exhibit 10(n) to the Registrant's
               Annual Report on Form 10-K for the fiscal year ended
               January 2, 1993 [File No. 1-10791] and incorporated herein by
               reference).

     10.6      Stock Option Agreement granted to Hal Kirshner dated
               November 16, 1992 (filed as Exhibit 10(o) to the Registrant's
               Annual Report on Form 10-K for the fiscal year ended
               January 2, 1993 [File No. 1-10791] and incorporated herein by
               reference).

     10.7      Lease dated October 12, 1988 between CBI Laboratories, Inc.,
               Trammell Crow Company No. 91 and Petula Associates Ltd., as
               amended (filed as Exhibit 10.18 to the Registrant's Annual
               Report on Form 10-K for the fiscal year ended January 1, 1994
               [File No. 1-10791] and incorporated herein by reference).
                                       25PAGE

                                  EXHIBIT INDEX


    Exhibit
    Number     Description of Exhibit

     10.8      Lease dated September 1, 1993 between CBI Laboratories, Inc.
               and Lincoln Valwood, Ltd. (filed as Exhibit 10.19 to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended January 1, 1994 [File No. 1-10791] and incorporated
               herein by reference).

     10.9      Master Repurchase Agreement dated January 1, 1994 between the
               Registrant and Thermo Electron Corporation (filed as Exhibit
               10.20 to the Registrant's Annual Report on Form 10-K for the
               fiscal year ended January 1, 1994 [File No. 1-10791] and
               incorporated herein by reference).

     10.10     Master Guarantee Reimbursement Agreement dated as of January
               1, 1994 among ThermoLase Corporation, the Registrant and
               Thermo Electron Corporation (filed as Exhibit 10.5 to
               ThermoLase's Registration Statement on Form S-1 [Reg. No.
               33-78052] and incorporated herein by reference).

     10.11     Lease executed February 9, 1995 between LMP Properties Ltd.
               and the Registrant (filed as Exhibit 10.22 to the
               Registrant's Annual Report on Form 10-K for the fiscal year
               ended December 31, 1994 [File No. 1-10791] and incorporated
               herein by reference).

     10.12     Stock purchase agreement dated as of September 15, 1995, by
               and among Bennett X-Ray Corporation, ThermoTrex Corporation,
               and Calvin Kleinman, Robert P. Coe, Walter F. Schneider, and
               Martin Koening (filed as Exhibit 2 to the Registrant's
               Current Report on Form 8-K dated September 14, 1995 [File No.
               1-10791] and incorporated herein by reference).

     10.13     Lease dated as of September 15, 1995, by and among the
               Registrant and BK Realty Associates, L.P. and Calrob Realty
               Associates (filed as Exhibit 10.26 to the Registrant's
               Transition Report on Form 10-K for the transition period
               January 1, 1995 through September 30, 1995 [File No. 1-10791]
               and incorporated herein by reference). 

     10.14     Incentive Stock Option Plan of the Registrant (filed as
               Exhibit 10(h) to the Registrant's Registration Statement on
               Form S-1 [Reg. No. 33-40972] and incorporated herein by
               reference). (Maximum number of shares issuable in the
               aggregate under this plan and the Registrant's Nonqualified
               Stock Option Plan is 1,945,000 shares, after adjustment to
               reflect share increases approved in 1992 and 1993 and 3-for-2
               stock split effected in October 1993).

                                       26PAGE

                                  EXHIBIT INDEX


    Exhibit
    Number     Description of Exhibit

     10.15     Nonqualified Stock Option Plan of the Registrant (filed as
               Exhibit 10(i) to the Registrant's Registration Statement on
               Form S-1 [Reg. No. 33-40972] and incorporated herein by
               reference). (Maximum number of shares issuable in the
               aggregate under this plan and the Registrant's Incentive
               Stock Option Plan is 1,945,000 shares, after adjustment to
               reflect share increases approved in 1992 and 1993 and 3-for-2
               stock split effected in October 1993).

     10.16     ThermoTrex Corporation - ThermoLase Corporation (formerly
               ThermoLase Inc.) Nonqualified Stock Option Plan (filed as
               Exhibit 10.53 to the Registrant's Annual Report on Form 10-K
               for the fiscal year ended January 1, 1994 [File No. 1-10791]
               and incorporated herein by reference).

     10.17     ThermoTrex Corporation - Trex Medical Corporation
               Nonqualified Stock Option Plan (filed as Exhibit 10.73 to
               Thermo Cardiosystems' Annual Report on Form 10-K for the
               fiscal year ended December 30, 1995 [File No. 1-10114] and
               incorporated herein by reference).

     10.18     Deferred Compensation Plan for Directors of the Registrant
               (filed as Exhibit 10(j) to the Registrant's Registration
               Statement on Form S-1 [Reg. No. 33-40972] and incorporated
               herein by reference).

     10.19     Directors Stock Option Plan of the Registrant (filed as
               Exhibit 10.26 to the Registrant's Annual Report on Form 10-K
               for the fiscal year ended December 31, 1994 [File No.
               1-10791] and incorporated herein by reference).

               In addition to the stock-based compensation plans of the
               Registrant, the executive officers of the Registrant may be
               granted awards under stock-based compensation plans of Thermo
               Electron Corporation for services rendered to the Registrant
               or such affiliated corporations. Such plans were filed as
               Exhibits 10.21 through 10.44 to the Annual Report on Form
               10-K of Thermo Electron for the fiscal year ended December
               30, 1995 [File No. 1-8002] and as Exhibit 10.19 to Trex
               Medical Corporation's Annual Report on Form 10-K for the
               fiscal year ended September 28, 1996 [File No. 1-11827] and
               are incorporated herein by reference.

     10.20     Operating Agreement of ThermoLase Japan L.L.C. dated as of
               January 22, 1996 between ThermoLase Corporation and Fox River
               Japan Partners, L.P. (filed as Exhibit 10.1 to ThermoLase's
               Quarterly Report on Form 10-Q for the quarter ended December
               30, 1995 [File No. 1-13104] and incorporated herein by
               reference).

                                       27PAGE

                                  EXHIBIT INDEX


    Exhibit
    Number     Description of Exhibit

     10.21     License Agreement dated as of January 22, 1996 between
               ThermoLase Corporation and ThermoLase Japan L.L.C. (filed as
               Exhibit 10.2 to ThermoLase's Quarterly Report on Form 10-Q
               for the quarter ended December 30, 1995 [File No. 1-13104]
               and incorporated herein by reference).

     10.22     Option Agreement dated as of January 22, 1996 between
               ThermoLase Corporation and Fox River Japan Partners, L.P.
               (filed as Exhibit 10.3 to ThermoLase's Quarterly Report on
               Form 10-Q for the quarter ended December 30, 1995 [File No.
               1-13104] and incorporated herein by reference).

     10.23     License Agreement dated as of October 30, 1995 between
               ThermoLase Corporation and Ronald G. Wheeland, M.D.,
               Professional Corporation (filed as Exhibit 10.4 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.24     Management Agreement dated as of October 30, 1995 between
               ThermoLase Corporation and Ronald G. Wheeland, M.D.,
               Professional Corporation (filed as Exhibit 10.5 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.25     Sublease Agreement dated as of October 30, 1995 between
               ThermoLase Corporation and Ronald G. Wheeland, M.D.,
               Professional Corporation (filed as Exhibit 10.6 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.26     Lease dated as of April 12, 1995 between ThermoLase
               Corporation and The Goldberg Family Trust (filed as Exhibit
               10.7 to ThermoLase's Quarterly Report on Form 10-Q for the
               quarter ended December 30, 1995 [File No. 1-13104] and
               incorporated herein by reference).

     10.27     Lease dated as of December 8, 1995 between ThermoLase
               Corporation and Canon Properties (filed as Exhibit 10.8 to
               ThermoLase's Quarterly Report on Form 10-Q for the quarter
               ended December 30, 1995 [File No. 1-13104] and incorporated
               herein by reference).

     10.28     Lease dated as of January 17, 1996 between ThermoLase
               Corporation and Trammell Crow Equity Partners (filed as
               Exhibit 10.9 to ThermoLase's Quarterly Report on Form 10-Q
               for the quarter ended December 30, 1995 [File No. 1-13104]
               and incorporated herein by reference).
                                       28PAGE

                                  EXHIBIT INDEX


    Exhibit
    Number     Description of Exhibit

     10.29     Lease dated as of December 20, 1995, between Melvyn J. Powers
               and Mary P. Powers D/B/A M&M Realty and Trex Medical
               Corporation as amended (filed as Exhibit 10.14 to Trex
               Medical's Registration Statement on Form S-1 [Reg. No.
               333-2926] and incorporated herein by reference).

     10.30     Lease dated May 29, 1996 between John K. Grady, Trustee of
               Concord Associates Foster Street Trust and XRE Corporation
               (filed as Exhibit 10.89 to Trex Medical's Registration
               Statement on Form S-1 [Reg. No. 333-2926] and incorporated
               herein by reference).

     10.31     Asset Purchase Agreement dated September 4, 1996 by and among
               CXR Acquisition Corp., Trex Medical Corporation, Continental
               X-Ray Corporation, Alphatek Corporation, Broadview
               Manufacturing Corporation, Haymarket Square Associates,
               Advanced Medical Imaging, Inc., Trans-Continental X-ray
               Corporation and the Stockholders and Partners thereof (filed
               as Exhibit 10.21 to Trex Medical's Registration Statement on
               Form S-1 [Reg. No. 333-15381] and incorporated herein by
               reference).

     10.32     Master Joint Venture Agreement dated as of October 30, 1996
               among ThermoLase Corporation, Franklin Holdings, S.A. and
               Yves Micheli (filed as Exhibit 10.26 to ThermoLase's Annual
               Report on Form 10-K for the fiscal year ended September 28,
               1996 [File No. 1-13104] and incorporated herein by
               reference).

     10.33     SoftLight and Spa Thira Franchise and License Agreement dated
               as of November 8, 1996 between ThermoLase Corporation and
               Medical Supply & Service Co. (filed as Exhibit 10.27 to
               ThermoLase's Annual Report on Form 10-K for the fiscal year
               ended September 28, 1996 [File No. 1-13104] and incorporated
               herein by reference).

     10.34     Equipment License Agreement for SoftLight Lasers dated as of
               November 8, 1996 between ThermoLase Corporation and Medical
               Supply & Service Co. (filed as Exhibit 10.28 to ThermoLase's
               Annual Report on Form 10-K for the fiscal year ended
               September 28, 1996 [File No. 1-13104] and incorporated herein
               by reference).

     10.35     Promissory Note Due April 30, 1997 issued by the Registrant
               to Thermo Electron Corporation.

     10.36     Stock Holding Assistance Plan and Form of Promissory Note.

     11        Statement re: Computation of Earnings per Share.
                                       29PAGE

                                  EXHIBIT INDEX


    Exhibit
    Number     Description of Exhibit

    13         Annual Report to Shareholders for the fiscal year ended
               September 28, 1996 (only those portions incorporated herein
               by reference).

    21         Subsidiaries of the Registrant.

    23         Consent of Arthur Andersen LLP.

    27         Financial Data Schedule.