SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549
              ----------------------------------------------------

                         AMENDMENT NO. 1 ON FORM 10-Q/A

(mark one)
[ X ] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities
      Exchange Act of 1934 for the Quarter Ended July 3, 1999

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

                         Commission File Number 1-13876

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

Delaware                                                            04-3242970
(State or other jurisdiction of            (I.R.S. Employer Identification No.)
 incorporation or organization)

8 East Forge Parkway
Franklin, Massachusetts                                                   02038
(Address of principal executive offices)                             (Zip Code)

       Registrant's telephone number, including area code: (781) 622-1000

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 (or for such shorter period that the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes [ X ] No [ ]

Indicate the number of shares outstanding of each of the issuer's classes of
Common Stock, as of the latest practicable date.

          Class                         Outstanding at July 30, 1999
  Common Stock, $.01 par value                      15,374,915


<PAGE>
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PART I - FINANCIAL INFORMATION

Item 1 - Financial Statements

                            THERMOSPECTRA CORPORATION

                           Consolidated Balance Sheet
                                   (Unaudited)
<S>                                                                                 <C>        <C>

                                     Assets

                                                                                       July 3, January 2,
(In thousands)                                                                            1999       1999
----------------------------------------------------------------------------------- ---------- ----------

Current Assets:
 Cash and cash equivalents                                                            $  9,723    $20,717
 Advance to affiliate (Note 7)                                                           7,243          -
 Accounts receivable, less allowances of $2,172 and $2,386                              36,792     41,016
 Inventories:
   Raw materials and supplies                                                           18,921     18,355
   Work in process                                                                       4,830      5,899
   Finished goods                                                                        6,785      7,491
 Prepaid income taxes                                                                   13,107     10,188
 Other current assets                                                                    2,343      2,271
                                                                                      --------   --------

                                                                                        99,744    105,937
                                                                                      --------   --------

Property, Plant, and Equipment, at Cost                                                 32,231     30,517
 Less:  Accumulated depreciation and amortization                                       16,019     13,526
                                                                                      --------   --------

                                                                                        16,212     16,991
                                                                                      --------   --------

Patents, Trademarks, and Other Assets                                                    7,059      7,280
                                                                                      --------   --------

Cost in Excess of Net Assets of Acquired Companies                                     117,210    119,674
                                                                                      --------   --------

                                                                                      $240,225   $249,882
                                                                                      ========   ========



                                       2
<PAGE>


                            THERMOSPECTRA CORPORATION
                     Consolidated Balance Sheet (continued)
                                   (Unaudited)

                    Liabilities and Shareholders' Investment

                                                                                       July 3,  January 2,
(In thousands except share amounts)                                                       1999        1999
------------------------------------------------------------------------------------ ---------- ----------

Current Liabilities:
 Notes payable (includes $50,000 and $60,000 due to Thermo Electron)                   $52,714    $ 60,000
 Accounts payable                                                                       13,135      11,822
 Accrued payroll and employee benefits                                                   5,221       6,239
 Accrued installation and warranty expenses                                              4,533       4,362
 Deferred revenue                                                                        3,624       4,360
 Accrued income taxes                                                                    4,770       3,735
 Accrued restructuring costs (Note 6)                                                      907       2,459
 Other accrued expenses (Note 5)                                                        11,025      10,684
 Due to parent company and affiliated companies                                          2,627       4,528
                                                                                      --------    --------

                                                                                        98,556     108,189
                                                                                      --------    --------

Deferred Income Taxes and Other Deferred Items                                           4,696       3,558
                                                                                      --------    --------

Long-term Obligations, Due to Related Party                                              7,300       7,300
                                                                                      --------    --------

Shareholders' Investment:
 Common stock, $.01 par value, 25,000,000 shares authorized;                               154         153
   15,369,190 and 15,327,620 shares issued
 Capital in excess of par value                                                        111,900     111,549
 Retained earnings                                                                      20,319      19,763
 Treasury stock at cost, 423 shares                                                         (7)         (7)
 Accumulated other comprehensive items (Note 2)                                         (2,693)       (623)
                                                                                      --------    --------

                                                                                       129,673     130,835
                                                                                      --------    --------

                                                                                      $240,225    $249,882
                                                                                      ========    ========















The accompanying notes are an integral part of these consolidated financial
statements.

                                       3
<PAGE>
                            THERMOSPECTRA CORPORATION

                        Consolidated Statement of Income
                                   (Unaudited)

                                                                                       Three Months Ended
                                                                                       July 3,    July 4,
(In thousands except per share amounts)                                                   1999       1998
----------------------------------------------------------------------------------- ----------- ----------

Revenues                                                                               $42,735    $49,058
                                                                                       -------    -------

Costs and Operating Expenses:
 Cost of revenues                                                                       25,376     28,434
 Selling, general, and administrative expenses                                          11,841     13,160
 Research and development expenses                                                       3,759      4,199
 Restructuring costs (Note 6)                                                              117          -
                                                                                       -------    -------

                                                                                        41,093     45,793
                                                                                       -------    -------

Operating Income                                                                         1,642      3,265

Interest Income                                                                            176        448
Interest Expense, Related Party                                                           (755)    (1,185)
                                                                                       -------    -------

Income Before Provision for Income Taxes                                                 1,063      2,528
Provision for Income Taxes                                                                 511      1,040
                                                                                       -------    -------

Net Income                                                                             $   552    $ 1,488
                                                                                       =======    =======

Basic and Diluted Earnings per Share (Note 3)                                          $   .04    $   .10
                                                                                       =======    =======

Weighted Average Shares (Note 3):
 Basic                                                                                  15,346     15,324
                                                                                       =======    =======

 Diluted                                                                                15,473     15,351
                                                                                       =======    =======


















The accompanying notes are an integral part of these consolidated financial
statements.


                                       4
<PAGE>


                            THERMOSPECTRA CORPORATION


                        Consolidated Statement of Income
                                   (Unaudited)

                                                                                        Six Months Ended
                                                                                       July 3,     July 4,
(In thousands except per share amounts)                                                   1999        1998
------------------------------------------------------------------------------------ ---------- ----------

Revenues                                                                               $84,609    $102,125
                                                                                       -------    --------

Costs and Operating Expenses:
 Cost of revenues                                                                       50,487      58,831
 Selling, general, and administrative expenses                                          23,478      27,278
 Research and development expenses                                                       7,530       8,712
 Restructuring costs (Note 6)                                                              875           -
 Gain on sale of property, plant, and equipment                                            (45)       (339)
                                                                                       -------    --------

                                                                                        82,325      94,482
                                                                                       -------    --------

Operating Income                                                                         2,284       7,643

Interest Income                                                                            364         773
Interest Expense, Related Party                                                         (1,577)     (2,376)
                                                                                       -------    --------

Income Before Provision for Income Taxes                                                 1,071       6,040
Provision for Income Taxes                                                                 515       2,480
                                                                                       -------    --------

Net Income                                                                             $   556    $  3,560
                                                                                       =======    ========

Basic and Diluted Earnings per Share (Note 3)                                          $   .04    $    .23
                                                                                       =======    ========

Weighted Average Shares (Note 3):
 Basic                                                                                  15,338      15,322
                                                                                       =======    ========

 Diluted                                                                                15,430      15,344
                                                                                       =======    ========

















The accompanying notes are an integral part of these consolidated financial
statements.


                                       5
<PAGE>

                            THERMOSPECTRA CORPORATION


                      Consolidated Statement of Cash Flows
                                   (Unaudited)

                                                                                        Six Months Ended
                                                                                       July 3,     July 4,
(In thousands)                                                                            1999        1998
------------------------------------------------------------------------------------ ---------- ----------

Operating Activities:
 Net income                                                                            $   556    $  3,560
 Adjustments to reconcile net income to net cash provided by operating
  activities:
   Depreciation and amortization                                                         4,346       3,581
   Provision for losses on accounts receivable                                              44          96
   Gain on sale of property, plant, and equipment                                          (45)       (339)
   Other noncash expenses                                                                  486         495
   Changes in current accounts, excluding the effects of a disposition:
     Accounts receivable                                                                 2,956       3,146
     Inventories                                                                           653         486
     Other current assets                                                                 (126)       (427)
     Accounts payable                                                                    1,485        (849)
     Due to parent company and affiliated companies                                     (1,352)      2,013
     Other current liabilities                                                          (3,111)     (1,171)
   Other                                                                                     -         106
                                                                                       -------    --------

       Net cash provided by operating activities                                         5,892      10,697
                                                                                       -------    --------

Investing Activities:
 Proceeds from sale of a product line                                                        -         750
 Refund of acquisition purchase price                                                      595           -
 Advances to affiliate, net (Note 7)                                                    (7,243)          -
 Purchases of property, plant, and equipment                                            (2,193)       (942)
 Proceeds from sale of property, plant, and equipment                                      160       2,052
 Other, net                                                                               (148)        (30)
                                                                                       -------    --------

       Net cash provided by (used in) investing activities                              (8,829)      1,830
                                                                                       -------    --------

Financing Activities:
 Repayment of obligation to Thermo Electron                                            (10,000)          -
 Net proceeds from issuance of Company common stock                                        352          42
 Increase in short-term borrowings                                                       2,812           -
                                                                                       -------    --------

       Net cash provided by (used in) financing activities                              (6,836)         42
                                                                                       -------    --------

Exchange Rate Effect on Cash                                                            (1,221)        (89)
                                                                                       -------    --------

Increase (Decrease) in Cash and Cash Equivalents                                       (10,994)     12,480
Cash and Cash Equivalents at Beginning of Period                                        20,717      20,672
                                                                                       -------    --------

Cash and Cash Equivalents at End of Period                                             $ 9,723    $ 33,152
                                                                                       =======    ========



The accompanying notes are an integral part of these consolidated financial
statements.


                                       6
<PAGE>

                   Notes to Consolidated Financial Statements

1.    General

      The interim consolidated financial statements presented have been prepared
by ThermoSpectra Corporation (the Company) without audit and, in the opinion of
management, reflect all adjustments of a normal recurring nature necessary for a
fair statement of the financial position at July 3, 1999, the results of
operations for the three- and six-month periods ended July 3, 1999, and July 4,
1998, and the cash flows for the six-month periods ended July 3, 1999, and July
4, 1998. Interim results are not necessarily indicative of results for a full
year.

      The consolidated balance sheet presented as of January 2, 1999, has been
derived from the consolidated financial statements that have been audited by the
Company's independent public accountants. The consolidated financial statements
and notes are presented as permitted by Form 10-Q and do not contain certain
information included in the annual financial statements and notes of the
Company. The consolidated financial statements and notes included herein should
be read in conjunction with the financial statements and notes included in the
Company's Annual Report on Form 10-K for the fiscal year ended January 2, 1999,
as amended, filed with the Securities and Exchange Commission.

2.    Comprehensive Income

      Comprehensive income combines net income and "other comprehensive items,"
which represents certain amounts that are reported as components of
shareholders' investment in the accompanying balance sheet, including foreign
currency translation adjustments and, in the 1998 period, unrealized net of tax
gains and losses from available-for-sale investments. During the second quarter
of 1999 and 1998, the Company had a comprehensive loss of $478,000 and
comprehensive income of $1,984,000, respectively. During the first six months of
1999 and 1998, the Company had a comprehensive loss of $1,514,000 and
comprehensive income of $4,265,000, respectively.
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3.    Earnings per Share

      Basic and diluted earnings per share were calculated as follows:
<S>                                                           <C>        <C>         <C>        <C>

                                                                Three Months Ended      Six Months Ended
                                                                July 3,     July 4,    July 3,     July 4,
(In thousands except per share amounts)                            1999        1998       1999        1998
------------------------------------------------------------- ---------- ----------- ---------- ----------

Basic
Net Income                                                       $  552     $ 1,488     $  556     $ 3,560
                                                                 ------     -------     ------     -------

Weighted Average Shares                                          15,346      15,324     15,338      15,322
                                                                 ------     -------     ------     -------

Basic Earnings per Share                                         $  .04     $   .10     $  .04     $   .23
                                                                 ======     =======     ======     =======

Diluted
Net Income                                                       $  552     $ 1,488     $  556     $ 3,560
                                                                 ------     -------     ------     -------

Weighted Average Shares                                          15,346      15,324     15,338      15,322
Effect of Stock Options                                             127          27         92          22
                                                                 ------     -------     ------     -------

Weighted Average Shares, as Adjusted                             15,473      15,351     15,430      15,344
                                                                 ------     -------     ------     -------

Diluted Earnings per Share                                       $  .04     $   .10     $  .04     $   .23
                                                                 ======     =======     ======     =======


                                       7
<PAGE>

3.    Earnings per Share (continued)

      The computation of diluted earnings per share for each period excludes the
effect of assuming the exercise of certain outstanding stock options because the
effect would be antidilutive. As of July 3, 1999, there were 133,000 of such
options outstanding, with exercise prices ranging from $14.00 to $17.15 per
share.

4.    Business Segment Information

                                                                 Three Months Ended     Six Months Ended
                                                                July 3,     July 4,    July 3,     July 4,
(In thousands)                                                     1999        1998       1999        1998
------------------------------------------------------------- ---------- ----------- ---------- ----------

Revenues:
 Imaging and Inspection                                        $ 20,466   $  22,120   $ 41,879   $  45,113
 Temperature Control                                             12,479      15,953     24,512      34,545
 Test and Measurement                                             9,790      10,985     18,218      22,467
                                                               --------   ---------   --------   ---------

                                                               $ 42,735   $  49,058   $ 84,609   $ 102,125
                                                               ========   =========   ========   =========

Income Before Provision for Income Taxes:
 Imaging and Inspection                                        $    575   $   1,365   $    756   $   3,056
 Temperature Control                                                851       1,906      1,378       4,498
 Test and Measurement                                               775         494      1,145       1,184
 Corporate (a)                                                     (559)       (500)      (995)     (1,095)
                                                               --------   ---------   --------   ---------

 Total operating income                                           1,642       3,265      2,284       7,643
 Interest expense, net                                             (579)       (737)    (1,213)     (1,603)
                                                               --------   ---------   --------   ---------

                                                               $  1,063   $   2,528   $  1,071   $   6,040
                                                               ========   =========   ========   =========

(a) Primarily general and administrative expenses.

5.     Accrued Acquisition Expenses

      The Company has undertaken restructuring activities at certain acquired
businesses. The Company's restructuring activities, which were accounted for in
accordance with Emerging Issues Task Force Pronouncement (EITF) 95-3, primarily
have included reductions in staffing levels and the abandonment of excess
facilities. In connection with these restructuring activities, as part of the
cost of acquisitions, the Company established reserves, as detailed below,
primarily for severance and excess facilities. In accordance with EITF 95-3, the
Company finalizes its restructuring plans no later than one year from the
respective dates of the acquisitions.

      A summary of the changes in accrued acquisition expenses for severance
follows:

                                                                                               Imaging and
                                                                                                Inspection
                                                                                                   Segment
                                                                                             --------------
(In thousands)                                                                                  Topometrix
--------------------------------------------------------------- -------------- ------------- --------------

Balance at January 2, 1999                                                                           $  30
 Reserves established                                                                                   39
 Usage                                                                                                 (63)
                                                                                                     -----

Balance at July 3, 1999                                                                              $   6
                                                                                                     =====
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                                       8
<PAGE>
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<CAPTION>


5.    Accrued Acquisition Expenses (continued)

      A summary of the changes in accrued acquisition expenses for the
      abandonment of excess facilities follows:

  (In thousands)                                                 Imaging and     Temperature
                                                                  Inspection         Control
                                                                     Segment         Segment
                                                              --------------- ---------------
                                                                  TopoMetrix          NESLAB         Total
  ---------------------------------------------------------------------------------------------------------

<S>                                                           <C>             <C>               <C>
  Balance at January 2, 1999                                          $ 365           $  51          $ 416
    Reserves established                                                207               -            207
    Usage                                                              (407)            (40)          (447)
    Currency translation                                                  -              (5)            (5)
                                                                      -----           -----          -----

  Balance at July 3, 1999                                             $ 165           $   6          $ 171
                                                                      =====           =====          =====

      The increase in accrued acquisition expenses in 1999 principally related
to cancellation of operating leases at the Imaging and Inspection segment's
TopoMetrix Corporation subsidiary's sales and services office in Germany and at
its manufacturing facility in California, both of which were closed. In
addition, the increase represented severance across all functions at this
business.

      Unresolved matters at July 3, 1999, primarily included completion of
abandonment of excess facilities for TopoMetrix, acquired in October 1998.
Accrued acquisition expenses are included in other accrued expenses in the
accompanying balance sheet.

6.     Restructuring Costs

      During 1998, the Company recorded restructuring costs, which were
accounted for in accordance with EITF 94-3, primarily for severance for 259
employees. As of January 2, 1999, the Company had terminated 182 employees and
had $2,459,000 accrued for severance costs. During the first quarter of 1999,
the Company terminated 30 additional employees and incurred restructuring costs
of $758,000, which consisted of $259,000 related to severance costs for four
employees at a foreign sales office, $155,000 for facility-closing costs, and
$344,000 related to certain business relocation and related costs. During the
second quarter of 1999, the Company terminated six additional employees and
incurred restructuring costs of $117,000, which consisted of $6,000 related to
severance costs for five employees at a foreign sales office, $46,000 for
facility-closing costs, and $65,000 for certain business relocation and related
costs. The Company expects that the remainder of the employees will be
terminated primarily in the third quarter of 1999. A summary of the changes in
accrued restructuring costs for the Company's 1998 restructuring plan follows:
</TABLE>
<TABLE>
<CAPTION>
<S>                                             <C>            <C>            <C>            <C>

                                                                 Abandonment
                                                                   of Excess
(In thousands)                                      Severance     Facilities          Other         Total
----------------------------------------------- -------------- -------------- -------------- -------------

Balance at January 2, 1999                            $ 2,459        $     -        $     -        $ 2,459
 Costs incurred in 1999 (a)                               265            201            409            875
 1999 Usage                                            (1,773)          (201)          (409)        (2,383)
 Currency translation                                     (44)             -              -            (44)
                                                      --------       -------        -------        -------

Balance at July 3, 1999                               $   907        $     -        $     -        $   907
                                                      =======        =======        =======        =======

(a) Reflects restructuring costs recorded by the Imaging and Inspection segment.

                                       9
<PAGE>

6.    Restructuring Costs (continued)

      In connection with the Company's restructuring activities, the Company
expects to incur approximately $200,000 of additional costs which, pursuant to
the requirements of EITF 94-3, are not permitted as charges until incurred.
These additional costs primarily include costs for certain employee and business
relocation and related costs. The Company plans to complete implementation of
its restructuring plan in the third quarter of 1999.

7.     Cash Management Arrangement

      Effective June 1, 1999, the Company and Thermo Electron Corporation
commenced use of a new domestic cash management arrangement. Under the new
arrangement, amounts advanced to Thermo Electron by the Company for domestic
cash management purposes bear interest at the 30-day Dealer Commercial Paper
Rate (DCP Rate) plus 50 basis points, set at the beginning of each month. Thermo
Electron is contractually required to maintain cash, cash equivalents, and/or
immediately available bank lines of credit equal to at least 50% of all funds
invested under this cash management arrangement by all Thermo Electron
subsidiaries other than wholly owned subsidiaries. The Company has the
contractual right to withdraw its funds invested in the cash management
arrangement upon 30 days' prior notice. Amounts invested in this arrangement are
included in "advance to affiliate" in the accompanying balance sheet.

      In addition, under the new domestic cash management arrangement, amounts
borrowed from Thermo Electron by the Company for domestic cash management
purposes bear interest at the 30-day DCP Rate plus 150 basis points, set at the
beginning of each month. The Company has no borrowings under this arrangement at
July 3, 1999.

8.     Proposed Merger

      On May 21, 1999, the Company entered into a definitive agreement and plan
of merger with Thermo Instrument Systems Inc. pursuant to which Thermo
Instrument would acquire all of the outstanding shares of Company common stock
held by shareholders other than Thermo Instrument and Thermo Electron in
exchange for $16.00 in cash per share, without interest. Following the merger,
the Company's common stock would cease to be publicly traded. The Board of
Directors of the Company unanimously approved the merger agreement based on a
recommendation by a special committee of the Board of Directors, consisting
solely of outside directors of the Company. The special committee's
recommendation was based on extensive negotiations, related to the pricing and
terms of this proposed transaction, with representatives of Thermo Instrument.
The completion of this merger is subject to certain conditions, including
shareholder approval of the merger agreement and the completion of review by the
Securities and Exchange Commission of certain required filings. Thermo Electron
and Thermo Instrument intend to vote all of their shares of common stock of the
Company in favor of approval of the merger agreement and, therefore, approval of
the merger agreement is assured. This merger is expected to be completed in the
fourth quarter of 1999.

Item 2 - Management's Discussion and Analysis of Financial Condition and Results of Operations

      Forward-looking statements, within the meaning of Section 21E of the
Securities and Exchange Act of 1934, are made throughout this Management's
Discussion and Analysis of Financial Condition and Results of Operations. For
this purpose, any statements contained herein that are not statements of
historical fact may be deemed to be forward-looking statements. Without limiting
the foregoing, the words "believes," "anticipates," "plans," "expects," "seeks,"
"estimates," and similar expressions are intended to identify forward-looking
statements. There are a number of important factors that could cause the results
of the Company to differ materially from those indicated by such forward-looking
statements, including those detailed under the heading "Forward-looking
Statements" in Exhibit 13 to Amendment No. 1 to the Company's Annual Report on
Form 10-K/A for the fiscal year ended January 2, 1999, filed with the Securities
and Exchange Commission.

                                       10
<PAGE>

Overview

      The Company develops, manufactures, and markets precision instruments in
three segments: Imaging and Inspection, Temperature Control, and Test and
Measurement. These instruments are generally combined with proprietary
operations and analysis software to provide industrial and research customers
with integrated systems that address their specific needs. The Imaging and
Inspection segment includes X-ray microanalysis instruments; X-ray fluorescence
instruments; nondestructive X-ray inspection systems; specialty X-ray tubes; and
confocal laser scanning microscopes. In 1998, the Company acquired a
manufacturer of scanning probe microscopes, TopoMetrix Corporation. The
Temperature Control segment manufactures and markets precision temperature
control systems for analytical, laboratory, industrial, research and
development, laser, and semiconductor applications. The Test and Measurement
segment includes digital oscillographic recorders, digital storage oscilloscopes
(DSOs), and data acquisition systems.

      The Company's growth strategy has included acquiring complementary
businesses, developing new applications for its technologies to address related
market segments, and strengthening its presence in selected geographic markets.
Because the Company competes primarily on the basis of its technology in all of
its segments, it will also need to continually improve the technology underlying
the products of any company it acquires. One of the Company's principal goals
during recent quarters has been to improve operating margins. As part of this
plan, the Company completed the divestiture of a low-margin product line and
undertook certain other restructuring actions during 1998.

      A significant portion of the Company's total revenues, primarily in the
Imaging and Inspection and Temperature Control segments, is attributable to the
sale of products and related services to customers in the semiconductor
industry. The semiconductor industry has historically been cyclical and is
characterized by sudden and sharp changes in supply and demand. Demand for the
Company's products and services within the semiconductor industry is dependent
upon, among other things, the level of capital spending by semiconductor
companies. The semiconductor industry has been experiencing weakness in demand
for its products as a result of the economic crisis in Asia, excess
manufacturing capacity, and a slowdown in sales of high-end personal computers.
Many semiconductor manufacturers delayed construction or expansion of their
production facilities in response to the foregoing conditions. The slowdown in
semiconductor activity began to affect demand for the Company's products in the
second quarter of 1998. During the first six months of 1999, the semiconductor
industry has shown some increased activity, but not to the levels experienced
prior to this most recent slowdown. Continued fluctuation in the semiconductor
industry could have a significant adverse effect upon the demand for the
Company's products and related services, which could materially adversely affect
the Company's business and future results of operations.

      The Company conducts all of its manufacturing operations in the United
States. The Company sells its products worldwide. During 1998, exports to the
Far East represented 15% of total revenues. Asia is experiencing a severe
economic crisis, which has been characterized by sharply reduced economic
activity and liquidity, highly volatile foreign currency exchange and interest
rates, and unstable stock markets. The Company's sales to Asia have been, and
are expected to continue to be, adversely affected by the unstable economic
conditions in that region. Additionally, certain of the Company's customers
located outside of the Asian region could be adversely affected by the unstable
economic conditions in Asia.

      The Company anticipates that a significant portion of its revenues in all
three segments will be from sales to customers outside the United States. The
Company's business activities outside the United States are conducted through
sales and service subsidiaries and through third-party representatives and
distributors. The results of the Company's international operations are subject
to foreign currency fluctuations, and the exchange rate value of the dollar may
have a significant impact on both revenues and earnings. The Company may use
forward contracts to reduce its exposure to currency fluctuations.

                                       11
<PAGE>

Results of Operations

Second Quarter 1999 Compared With Second Quarter 1998

      Total revenues decreased to $42.7 million in the second quarter of 1999
from $49.1 million in the second quarter of 1998. Revenues from the Imaging and
Inspection segment decreased $1.7 million to $20.4 million in 1999 from $22.1
million in 1998, primarily due to a $1.5 million decrease in revenues at Kevex
Instruments as a result of lower demand and lower revenues due to continued
softness in the semiconductor market. The decrease in revenues at the Imaging
and Inspection segment was offset in part by an increase of $2.0 million due to
the inclusion of revenues from TopoMetrix, acquired in October 1998. Revenues
from the Temperature Control segment decreased $3.5 million to $12.5 million in
1999 from $16.0 million in 1998, principally due to a continued reduction in
capital-equipment expenditures in the semiconductor industry. Revenues from the
Test and Measurement segment decreased $1.2 million to $9.8 million in 1999 from
$11.0 million in 1998, primarily due to a decline in demand for its products.
The Company's total backlog increased slightly to $26.6 million at July 3, 1999,
from $26.0 million at year-end 1998.

      The gross profit margin decreased to 41% in the second quarter of 1999
from 42% in the second quarter of 1998, primarily due to increased sales of
lower-margin products at certain of the Company's microanalysis businesses. The
decrease in the gross profit margin was offset in part by reduced spending on
labor and overhead of $0.7 million as a result of restructuring actions
commenced in 1998.

      Selling, general, and administrative expenses as a percentage of revenues
increased to 28% in the second quarter of 1999 from 27% in the second quarter of
1998, primarily due to decreased revenues. Selling, general, and administrative
expenses decreased 10% to $11.8 million in 1999 from $13.2 million in 1998,
primarily as a result of restructuring actions commenced in 1998.

      Research and development expenses decreased to $3.8 million in the second
quarter of 1999 from $4.2 million in the second quarter of 1998. The decreased
spending primarily resulted from the discontinuation of research and development
efforts on underperforming product lines, which reduced expenses by $0.4 million
and, to a lesser extent, completion of efforts relating to new-product releases.

      The Company recorded $0.1 million of restructuring costs in the second
quarter of 1999, all of which represents cash costs that were paid in 1999 (Note
6). The restructuring charges, which were recorded by the Imaging and Inspection
segment and relate to actions initiated in 1998, consist of severance costs of
$6,000, facility-closing costs of $46,000, and business relocation and related
costs of $65,000. The severance charge was recorded by Park Scientific
Instruments Corporation's (PSI) foreign sales office. The restructuring charges
for facility-closing and business relocation and related costs were recorded by
Kevex Instruments and relate to the closure of its southern California facility.
In connection with the closing of certain facilities, the Company expects to
incur approximately $0.2 million of additional costs in the third quarter of
1999.

      Interest income decreased to $0.2 million in the second quarter of 1999
from $0.4 million in the second quarter of 1998, principally due to a reduction
in invested balances as a result of the repayment of an aggregate $25.0 million
of promissory notes to Thermo Electron Corporation in August 1998 and March
1999. Interest expense, related party, decreased to $0.8 million in 1999 from
$1.2 million in 1998, primarily due to the repayment of such promissory notes.

      The effective tax rate was 48% in the second quarter of 1999, compared
with 41% in the second quarter of 1998. The effective tax rates exceeded the
statutory federal income tax rate primarily due to the impact of state income
taxes and nondeductible amortization of cost in excess of net assets of acquired
companies for certain of the Company's acquisitions. The effective tax rate
increased primarily due to the higher relative impact of nondeductible
amortization of cost in excess of net assets of acquired companies.

                                       12
<PAGE>

First Six Months 1999 Compared With First Six Months 1998

      Total revenues decreased to $84.6 million in the first six months of 1999
from $102.1 million in the first six months of 1998. Revenues from the Imaging
and Inspection segment decreased $3.2 million to $41.9 million in 1999 from
$45.1 million in 1998, primarily due to a $4.0 million decrease in revenues at
Kevex Instruments as a result of lower demand and lower revenues due to
continued softness in the semiconductor market. The decrease in revenues at the
Imaging and Inspection segment was offset in part by an increase of $3.9 million
due to the inclusion of revenues from TopoMetrix, acquired in October 1998.
Revenues from the Temperature Control segment decreased $10.0 million to $24.5
million in 1999 from $34.5 million in 1998, principally due to a severe
reduction in capital-equipment expenditures in the semiconductor industry.
Revenues from the Test and Measurement segment decreased $4.3 million to $18.2
million in 1999 from $22.5 million in 1998, primarily due to a decline in demand
for its products.

      The gross profit margin decreased to 40% in the first six months of 1999
from 42% in the first six months of 1998, primarily due to lower sales volume.
The decrease in the gross profit margin was offset in part by reduced spending
on labor and overhead of $3.2 million as a result of restructuring actions
commenced in 1998.

      Selling, general, and administrative expenses as a percentage of revenues
increased to 28% in the first six months of 1999 from 27% in the first six
months 1998, primarily due to decreased revenues. Selling, general, and
administrative expenses decreased 14% to $23.5 million in 1999 from $27.3
million in 1998, primarily as a result of restructuring actions commenced in
1998.

      Research and development expenses decreased to $7.5 million in the first
six months of 1999 from $8.7 million in the first six months of 1998. The
decreased spending resulted from the discontinuation of research and development
efforts on underperforming product lines, which reduced expenses by $0.7 million
and, to a lesser extent, the completion of efforts relating to new-product
releases.

      The Company recorded $0.9 million of restructuring costs in the first six
months of 1999, all of which represents cash costs that were paid in 1999 (Note
6). The restructuring charges relate to actions initiated in 1998 and consist of
severance costs of $0.3 million, facility-closing costs of $0.2 million, and
business relocation and related costs of $0.4 million. Of the total charge for
severance, $0.2 million was recorded by PSI and $40,000 was recorded by Kevex,
both of which are included in the Imaging and Inspection segment. The severance
charge was for terminations across all functions. The restructuring charges for
facility-closing and business relocation and related costs were recorded by
Kevex and relate to the closure of its southern California facility.

      Interest income decreased to $0.4 million in the first six months of 1999
from $0.8 million in the first six months of 1998. Interest expense, related
party, decreased to $1.6 million in 1999 from $2.4 million in 1998. Interest
income and interest expense decreased due to the reasons discussed in the
results of operations for the second quarter.

      The effective tax rate was 48% in the first six months of 1999, compared
with 41% in the first six months of 1998. The effective tax rates exceeded the
statutory federal income tax rate primarily due to the impact of state income
taxes and nondeductible amortization of cost in excess of net assets of acquired
companies for certain of the Company's acquisitions. The effective tax rate
increased primarily due to the higher relative impact of nondeductible
amortization of cost in excess of net assets of acquired companies.

Liquidity and Capital Resources

      The Company had working capital of $1.2 million at July 3, 1999, compared
with negative working capital of $2.3 million at January 2, 1999. Included in
working capital are cash and cash equivalents of $9.7 million at July 3, 1999,
compared with $20.7 million at January 2, 1999. In addition, as of July 3, 1999,
the Company had $7.2 million invested in an advance to affiliate. Prior to the
use of a new domestic cash management arrangement between the Company and Thermo
Electron (Note 7), which became effective June 1, 1999, amounts invested with
Thermo

                                       13
<PAGE>

Liquidity and Capital Resources (continued)

Electron were included in cash and cash equivalents. Also included in working
capital are notes payable to Thermo Electron of $50.0 million at July 3, 1999,
and $60.0 million at January 2, 1999. In July 1999, the Company repaid its $5.0
million promissory note owed to Thermo Electron, and Thermo Electron extended
the maturity of the Company's $45.0 million promissory note to December 1999.
The promissory note bears interest at the 30-day Dealer Commercial Paper Rate
plus 150 basis points, set at the beginning of each month.

      During the first six months of 1999, the Company's operating activities
provided $5.9 million of cash. A decrease in accounts receivable, primarily due
to lower revenues, provided $3.0 million of cash. An increase in accounts
payable, due to the timing of payments, provided $1.5 million of cash. These
increases in cash were reduced in part by the use of $3.1 million of cash to
fund a decrease in other current liabilities, primarily for cash payments
relating to severance and facility-closure costs (Note 6). As of July 3, 1999,
the Company had $0.9 million of accrued restructuring costs, all of which it
expects to pay in the remainder of 1999.

      During the first six months of 1999, the Company's primary investing
activities, excluding advance to affiliate activity, included the purchase of
property, plant, and equipment. The Company used $2.2 million of cash for
purchases of property, plant, and equipment and received a $0.6 million refund
of a portion of the acquisition purchase price for PSI, which resulted from the
final determination of the post-closing adjustment. During the remainder of
1999, the Company plans to expend approximately $1.8 million for purchases of
property, plant, and equipment.

      During the first six months of 1999, the Company's financing activities
used $6.8 million of cash. The Company repaid $10.0 million of borrowings to
Thermo Electron in March 1999. In addition, an increase in short-term borrowings
provided $2.8 million of cash.

      The Company generally expects to have positive cash flow from its existing
operations. Although the Company does not presently intend to actively seek to
acquire additional businesses in the near future, it may acquire one or more
complementary businesses if they are presented to the Company on terms the
Company believes to be attractive. Such acquisitions may require significant
amounts of cash. The Company expects that it would seek to finance any such
acquisitions through a combination of internal funds and/or short-term
borrowings from Thermo Instrument or Thermo Electron, although it has no
agreement with these companies to ensure that any additional funds will be
available on acceptable terms or at all. Thermo Electron has indicated that it
will seek repayment from the Company of its $45.0 million promissory note, the
maturity of which was extended by Thermo Electron to December 1999, only to the
extent the Company's cash flow permits such repayment. Accordingly, the Company
believes that its existing resources and cash provided by operations are
sufficient to meet the capital requirements of its existing businesses for the
foreseeable future.

Year 2000

      The following information constitutes a "Year 2000 Readiness Disclosure"
under the Year 2000 Information and Readiness Disclosure Act. The Company
continues to assess the potential impact of the year 2000 date recognition issue
on the Company's internal business systems, products, and operations. The
Company's year 2000 initiatives include (i) testing and upgrading significant
information technology systems and facilities; (ii) testing and developing
upgrades, if necessary, for the Company's current products and certain
discontinued products; (iii) assessing the year 2000 readiness of its key
suppliers and vendors to determine their year 2000 compliance status; and (iv)
developing a contingency plan.

                                       14
<PAGE>

Year 2000 (continued)

The Company's State of Readiness

      The Company has implemented a compliance program to ensure that its
critical information technology systems and non-information technology systems
will be ready for the year 2000. In the first phase of the program, the Company
tested and evaluated critical information technology systems and non-information
technology systems for year 2000 compliance, which efforts included testing and
evaluating its significant computer systems, software applications, and related
equipment for year 2000 compliance, and testing the year 2000 readiness of its
manufacturing, utility, and telecommunications systems at its critical
facilities. In phase two of its program, any material noncompliant information
technology systems or non-information technology systems that were identified
during phase one were prioritized and remediated. In many cases, upgrades or
replacements were made in the ordinary course of business, without accelerating
previously scheduled upgrades or replacements. The Company believes that all of
its material information technology systems and critical non-information
technology systems are currently year 2000 compliant.

      The Company has also implemented a compliance program to test and evaluate
the year 2000 readiness of the material products that it currently manufactures
and sells. The Company believes that all such material products are year 2000
compliant. However, as many of the Company's products are complex, interact with
or incorporate third-party products, and operate on computer systems that are
not under the Company's control, there can be no assurance that the Company has
identified all of the year 2000 problems with its current products. The Company
believes that certain of its older products, which it no longer manufactures or
sells, may not be year 2000 compliant. The Company is continuing to test and
evaluate such products. The Company is focusing its efforts on products that are
still under warranty and/or are early in their expected life. The Company is
offering upgrades and/or identifying potential solutions where reasonably
practicable.

      The Company has also identified and assessed the year 2000 readiness of
key suppliers and vendors that are believed to be significant to the Company's
business operations. As part of this effort, the Company developed and
distributed questionnaires relating to year 2000 compliance to its significant
suppliers and vendors. The Company followed up with its significant suppliers
and vendors that did not respond to the Company's questionnaires. The Company
has completed the majority of its assessment of third-party risk.

Contingency Plan

      The Company has developed a contingency plan that will allow its primary
business operations to continue despite disruptions due to year 2000 problems.
This plan includes identifying and securing other suppliers, increasing
inventories, and modifying production facilities and schedules. As the Company
continues to evaluate the year 2000 readiness of its business systems and
facilities, products, and significant suppliers and vendors, it will modify and
adjust its contingency plan as may be required.

Estimated Costs to Address the Company's Year 2000 Issues

      To date, costs incurred in connection with the year 2000 issue have not
been material. The Company does not expect total year 2000 remediation costs to
be material, but there can be no assurance that the Company will not encounter
unexpected costs or delays in achieving year 2000 compliance. Year 2000 costs
are, and will continue to be, funded from working capital. All internal costs
and related external costs, other than capital additions, related to year 2000
remediation have been and will continue to be expensed as incurred. The Company
does not track the internal costs incurred for its year 2000 compliance project.
Such costs are principally the related payroll costs for its information systems
group.

                                       15
<PAGE>

Year 2000 (continued)

Reasonably Likely Worst Case Scenario

      At this point in time, the Company is not able to determine the most
reasonably likely worst case scenario to result from the year 2000 issue. One
possible worst case scenario would be that certain of the Company's material
suppliers or vendors experience business disruptions due to the year 2000 issue
and are unable to provide materials and services to the Company on time. The
Company's operations could be delayed or temporarily shut down, and it could be
unable to meet its obligations to customers in a timely fashion. The Company's
business, operations, and financial condition could be adversely affected in
amounts that cannot be reasonably estimated at this time. If the Company
believes that any of its key suppliers or vendors may not be year 2000
compliant, it will seek to identify and secure other suppliers or vendors as
part of its contingency plan.

Risks of the Company's Year 2000 Issues

      While the Company is attempting to minimize any negative consequences
arising from the year 2000 issue, there can be no assurance that year 2000
problems will not have a material adverse impact on the Company's business,
operations, or financial condition. Despite its efforts to ensure that its
material current products are year 2000 compliant, the Company may see an
increase in warranty and other claims, especially those related to Company
products that incorporate, or operate using, third-party software or hardware.
In addition, certain of the Company's older products, which it no longer
manufactures or sells, may not be year 2000 compliant, which may expose the
Company to claims. If any of the Company's material suppliers or vendors
experience business disruptions due to year 2000 issues, the Company might also
be materially adversely affected. There is expected to be a significant amount
of litigation relating to the year 2000 issue and there can be no assurance that
the Company will not incur material costs in defending or bringing lawsuits. In
addition, if any year 2000 issues are identified, there can be no assurance that
the Company will be able to retain qualified personnel to remedy such issues.
Any unexpected costs or delays arising from the year 2000 issue could have a
significant adverse impact on the Company's business, operations, and financial
condition in amounts that cannot be reasonably estimated at this time.

Item 3 - Quantitative and Qualitative Disclosure About Market Risk

      The Company's exposure to market risk from changes in foreign currency
exchange rates and interest rates has not changed materially from its exposure
at year-end 1998.

PART II - OTHER INFORMATION

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

     On May 27, 1999, at the Annual Meeting of  Shareholders,  the  shareholders
elected seven incumbent directors to a one-year term expiring in 2000. The
directors elected at the meeting were: Mr. Joseph A. Baute, Mr. David J.
Beaubien, Dr. Robert E. Finnigan, Dr. Elias P. Gyftopoulos, Mr. Barry S. Howe,
Mr. Earl R. Lewis, and Mr. Theo Melas-Kyriazi. Messrs. Baute and Beaubien and
Drs. Finnigan and Gyftopoulos each received 15,143,014 shares voted in favor of
election and 13,277 shares voted against. Messrs. Howe and Lewis each received
15,142,914 shares voted in favor of election and 13,377 shares voted against.
Mr. Melas-Kyriazi received 15,142,606 shares voted in favor of election and
13,685 shares voted against. No abstentions or broker nonvotes were recorded on
the election of directors.

                                       16
<PAGE>

Item 6 - Exhibits and Reports on Form 8-K

(a)   Exhibits

      See Exhibit Index on the page immediately preceding exhibits.

(b)    Reports on Form 8-K

      On May 25, 1999, the Company filed a Current Report on Form 8-K for events
occurring on May 21, 1999, with respect to a definitive agreement and plan of
merger entered into with its parent company, Thermo Instrument Systems Inc.



                                       17
<PAGE>

                                   SIGNATURES


      Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized as of the 8th day of October 1999.

                                                          THERMOSPECTRA CORPORATION



                                                          /s/ Theo Melas-Kyriazi
                                                          Theo Melas-Kyriazi
                                                          Chief Financial Officer






                                       18
<PAGE>

                                  EXHIBIT INDEX


Exhibit
Number         Description of Exhibit

  2.1          Agreement and Plan of Merger dated as of May 21, 1999, by and among
               Thermo Instrument Systems Inc., TS Acquisition Corporation, and the
               Registrant (filed as Exhibit 2.1 to the Registrant's Current
               Report on Form 8-K relating to events occurring on May 21, 1999
               [File No. 1-13876] and incorporated herein by reference).

  10.1*        Master Cash Management, Guarantee Reimbursement and Loan
               Agreement dated as of June 1, 1999, between the Registrant and
               Thermo Electron Corporation.

  10.2*        Amended and Restated $45,000,000 Promissory Note dated as of July
               30, 1999, issued by the Registrant to Thermo Electron
               Corporation.

  10.3*        Amended and Restated Deferred Compensation Plan for Directors of
               the Registrant.

  27*          Financial Data Schedule.


* Previously filed.


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