Page 1 of 50
                                                    Index to Exhibits on Page 14

                                  UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 10-Q
(Mark One)

[X]            QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                                   SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended November 30, 1999.

                                       OR

[ ]            TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                                   SECURITIES EXCHANGE ACT OF 1934

For the transition period from __________________ to ____________________.

Commission file number 1-3208.

                        NATIONAL SERVICE INDUSTRIES, INC.
             (Exact name of registrant as specified in its charter)

                  Delaware                              58-0364900

      (State or other jurisdiction of    (I.R.S. Employer Identification Number)
      incorporation or organization)

            1420 Peachtree Street, N.E., Atlanta, Georgia     30309-3002
              (Address of principal executive offices)        (Zip Code)

                                 (404) 853-1000
              (Registrant's telephone number, including area code)

                                      None
(Former Name, Former Address and Former Fiscal Year, if Changed Since Last
Report)

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.

Common Stock - $1.00 Par Value - 40,699,192 shares as of December 31, 1999.



Page 2



               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES

                                      INDEX



                                                                   Page No.
                                                               ----------------

PART I.  FINANCIAL INFORMATION

  ITEM 1.  FINANCIAL STATEMENTS

    CONSOLIDATED BALANCE SHEETS -
    NOVEMBER 30, 1999 AND AUGUST 31, 1999                               3

    CONSOLIDATED STATEMENTS OF INCOME -
    THREE MONTHS ENDED NOVEMBER 30, 1999 AND 1998                       4

    CONSOLIDATED STATEMENTS OF CASH FLOWS -
    THREE MONTHS ENDED NOVEMBER 30, 1999 AND 1998                       5

    NOTES TO CONSOLIDATED FINANCIAL STATEMENTS                         6-8

  ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL           9-11
           CONDITION AND RESULTS OF OPERATIONS

  ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT               11
           MARKET RISK

PART II.  OTHER INFORMATION

  ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS          12

  ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K                             12

SIGNATURES                                                              13

EXHIBIT INDEX                                                           14





                                                                          Page 3


               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES
                     CONSOLIDATED BALANCE SHEETS (Unaudited)
                 (In thousands, except share and per-share data)
                                                                                          November 30,      August 31,
                                                                                              1999             1999
                                                                                        -----------------  -------------
ASSETS
Current Assets:
                                                                                                       
      Cash and cash equivalents                                                               $    1,469     $    2,254
      Receivables, less reserves for doubtful accounts of $7,566 at November 30,
        1999 and $6,306 at August 31, 1999                                                       356,915        382,188
      Inventories, at the lower of cost (on a first-in, first-out basis) or market               234,909        218,191
      Linens in service, net of amortization                                                      57,715         58,875
      Deferred income taxes                                                                        9,073         10,271
      Prepayments                                                                                 12,648          8,634
                                                                                        -----------------  -------------
           Total Current Assets                                                                  672,729        680,413
                                                                                        -----------------  -------------
Property, Plant, and Equipment, at cost:
      Land                                                                                        27,227         25,764
      Buildings and leasehold improvements                                                       187,602        186,776
      Machinery and equipment                                                                    603,958        587,719
                                                                                        -----------------  -------------
           Total Property, Plant, and Equipment                                                  818,787        800,259
      Less-Accumulated depreciation and amortization                                             431,893        417,946
                                                                                        -----------------  -------------
           Property, Plant, and Equipment-net                                                    386,894        382,313
                                                                                        -----------------  -------------
Other Assets:
      Goodwill and other intangibles                                                             546,537        551,995
      Other                                                                                       79,064         81,068
                                                                                        -----------------  -------------
           Total Other Assets                                                                    625,601        633,063
                                                                                        -----------------  -------------
                Total Assets                                                                  $1,685,224     $1,695,789
                                                                                        =================  =============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
      Current maturities of long-term debt                                                    $      364     $      368
      Commercial paper, short-term                                                               120,474        102,539
      Notes payable                                                                               11,562         11,471
      Accounts payable                                                                           119,207        128,122
      Accrued salaries, commissions, and bonuses                                                  37,372         65,458
      Current portion of self-insurance reserves                                                   8,637          8,785
      Accrued taxes payable                                                                       13,807         12,203
      Other accrued liabilities                                                                   85,642         94,939
                                                                                        -----------------  -------------
           Total Current Liabilities                                                             397,065        423,885
                                                                                        -----------------  -------------
Long-Term Debt, less current maturities                                                          432,852        435,199
                                                                                        -----------------  -------------
Deferred Income Taxes                                                                             95,526         95,557
                                                                                        -----------------  -------------
Self-Insurance Reserves, less current portion                                                     38,710         38,828
                                                                                        -----------------  -------------
Other Long-Term Liabilities                                                                       86,965         86,446
                                                                                        -----------------  -------------

Stockholders' Equity:
      Series A participating  preferred stock, $.05 stated value, 500,000 shares
           authorized, none issued
      Preferred  stock,  no par value,  500,000 shares  authorized,  none issued
      Common stock,  $1 par value,  120,000,000  shares  authorized,  57,918,978
           shares issued                                                                          57,919         57,919
      Paid-in capital                                                                             30,427         29,055
      Retained earnings                                                                          987,837        976,461
      Accumulated other comprehensive income items                                                (9,336)        (9,326)
                                                                                        -----------------  -------------
                                                                                               1,066,847      1,054,109
      Less-Treasury stock, at cost (17,228,036 shares at November 30, 1999 and
           17,449,752 shares at August 31, 1999)                                                 432,741        438,235
                                                                                        -----------------  -------------
         Total Stockholders' Equity                                                              634,106        615,874
                                                                                        -----------------  -------------
                Total Liabilities and Stockholders' Equity                                    $1,685,224     $1,695,789
                                                                                        =================  =============

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



Page 4




               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES

                  CONSOLIDATED STATEMENTS OF INCOME (Unaudited)
                      (In thousands, except per-share data)


                                                         THREE MONTHS ENDED
                                                            NOVEMBER 30
                                                   -----------------------------
                                                        1999            1998
                                                   -------------   -------------
                                                             

Sales and Service Revenues:
      Net sales of products                        $    542,294    $     443,457
      Service revenues                                   77,716           75,469
                                                   -------------   -------------
           Total Revenues                               620,010          518,926
                                                   -------------   -------------

Costs and Expenses:
      Cost of products sold                              327,152         261,701
      Cost of services                                    45,134          43,737
      Selling and administrative expenses                193,733         170,207
      Interest expense, net                                9,986           2,342
      Other expense, net                                   4,153               9
                                                   -------------   -------------
           Total Costs and Expenses                      580,158         477,996
                                                   -------------   -------------

Income before Provision for Income Taxes                  39,852          40,930

Provision for Income Taxes                                15,462          15,226
                                                   -------------   -------------

Net Income                                         $      24,390   $      25,704
                                                   =============   =============

Per Share:
      Basic earnings per share                     $         .60   $         .62
                                                   =============   =============
      Basic Weighted Average Number
      of Shares Outstanding                               40,584          41,407
                                                   =============   =============

      Diluted earnings per share                   $         .60   $         .62
                                                   =============   =============
      Diluted Weighted Average
      Number of Shares Outstanding                        40,686          41,614
                                                   =============   =============














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



 

                                                                          Page 5
               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)
                                 (In thousands)
                                                                                                        THREE MONTHS ENDED
                                                                                                           NOVEMBER 30
                                                                                                   ---------------------------
                                                                                                       1999          1998
                                                                                                   ------------- -------------
                                                                                                           

Cash Provided by (Used for) Operating Activities
      Net income                                                                                        $ 24,390      $ 25,704
      Adjustments  to  reconcile  net income to net cash  provided by (used for)operating activities:
           Depreciation and amortization                                                                  21,210        14,444
           Provision for losses on accounts receivable                                                     1,315         1,430
           Gain on the sale of property, plant, and equipment                                               (434)          (60)
           Gain on the sale of business                                                                     (186)            -
           Change in noncurrent deferred income taxes                                                      2,614          (853)
           Change in assets and liabilities net of effect of acquisitions and divestitures-
                Receivables                                                                               27,853         3,445
                Inventories and linens in service, net                                                   (15,264)      (15,768)
                Deferred income taxes                                                                      1,754         2,681
                Prepayments and other                                                                     (3,700)       (5,420)
                Accounts payable and accrued liabilities                                                 (30,270)       19,153
                Self-insurance reserves and other long-term liabilities                                      426         1,234
                                                                                                   ------------- ---------------
                      Net Cash Provided by Operating Activities                                           29,708        45,990
                                                                                                   ------------- ---------------

Cash Provided by (Used for) Investing Activities
      Purchases of property, plant, and equipment                                                        (21,792)      (15,284)
      Sale of property, plant, and equipment                                                                 783           362
      Acquisitions                                                                                       (14,030)      (28,498)
      Change in other assets                                                                                 693         2,019
                                                                                                   ------------- ---------------
           Net Cash Used for Investing Activities                                                        (34,346)      (41,401)
                                                                                                   ------------- ---------------

Cash Provided by (Used for) Financing Activities
      Proceeds from notes payable, net                                                                        91           374
      Repayments of commerical paper, net (less than 90 days)                                            (73,931)            -
      Proceeds from issuances of commerical paper (greater than 90 days)                                  89,801             -
      Borrowings of long-term debt                                                                            -         28,003
      Repayments of long-term debt                                                                          (286)          (19)
      Issuances (purchases) of treasury stock, net                                                         1,199        (7,270)
      Cash dividends paid                                                                                (13,014)      (12,853)
                                                                                                   ------------- ---------------
           Net Cash Provided by Financing Activities                                                       3,860         8,235
                                                                                                   ------------- ---------------

Effect of Exchange Rate Changes on Cash                                                                       (7)           71
                                                                                                   ------------- ---------------

Net Change in Cash and Cash Equivalents                                                                     (785)       12,895

Cash and Cash Equivalents at Beginning of Period                                                           2,254        19,146
                                                                                                   ------------- ---------------

Cash and Cash Equivalents at End of Period                                                              $  1,469      $ 32,041
                                                                                                   ============= ===============

Supplemental Cash Flow Information:
      Income taxes paid (received) during the period                                                    $  9,207      $    (419)
      Interest paid during the period                                                                      5,511          2,742

Noncash Investing and Financing Activities:
      Treasury shares issued under long-term incentive plan                                             $  5,667      $      -
      Noncash aspects of acquisitions--
           Liabilities assumed or incurred                                                              $     24      $   5,418
           Treasury stock issued                                                                              -             845

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


Page 6

               NATIONAL SERVICE INDUSTRIES, INC. AND SUBSIDIARIES

             NOTES  TO  CONSOLIDATED   FINANCIAL   STATEMENTS   (Unaudited)
                (In thousands, except share and per-share data)

1.    BASIS OF PRESENTATION

The interim consolidated financial statements included herein have been prepared
by the company without audit and the condensed  consolidated balance sheet as of
August 31, 1999 has been  derived  from  audited  statements.  These  statements
reflect all adjustments,  all of which are of a normal,  recurring nature, which
are, in the opinion of management,  necessary to present fairly the consolidated
financial  position  as of  November  30,  1999,  the  consolidated  results  of
operations  for the three  months  ended  November  30,  1999 and 1998,  and the
consolidated  cash flows for the three months ended  November 30, 1999 and 1998.
Certain   reclassifications  have  been  made  to  the  prior  year's  financial
statements to conform to the current year's  presentation.  Certain  information
and footnote  disclosures  normally included in financial statements prepared in
accordance with generally accepted accounting  principles have been condensed or
omitted.  The company  believes  that the  disclosures  are adequate to make the
information  presented  not  misleading.  It is suggested  that these  financial
statements  be read in  conjunction  with the  financial  statements  and  notes
thereto included in the company's Annual Report on Form 10-K for the fiscal year
ended August 31, 1999.

The results of operations  for the three months ended  November 30, 1999 are not
necessarily  indicative  of the results to be expected  for the full fiscal year
because the  company's  revenues and income are  generally  higher in the second
half of its fiscal  year and  because  of the  uncertainty  of general  business
conditions.

2.    BUSINESS SEGMENT INFORMATION



                                                                             Depreciation        Capital
                                                 Sales and     Operating          and          Expenditures
                                                  Service        Profit       Amortization       Including
Three Months Ended November 30, 1999             Revenues        (Loss)         Expense        Acquisitions
                                               -------------- ------------- ----------------- ----------------
                                                                                  

Lighting Equipment                                  $367,595      $ 35,287          $ 12,406         $ 24,904
Chemical                                             119,901         8,622             2,712            1,334
Textile Rental                                        77,716         5,128             3,752            3,568
Envelope                                              54,798         3,068             1,781            4,347
                                                ------------- ------------- ----------------- ----------------
                                                     620,010        52,105            20,651           34,153
Corporate                                                           (2,267)              559            1,669
Interest expense, net                                               (9,986)
                                                ------------- ------------- ----------------- ----------------
Total                                               $620,010      $ 39,852          $ 21,210         $ 35,822
                                                ============= ============= ================= ================

                                                                              Depreciation        Capital
                                                 Sales and     Operating          and          Expenditures
                                                  Service        Profit       Amortization       Including
Three Months Ended November 30, 1998             Revenues        (Loss)         Expense        Acquisitions
                                               -------------- ------------- ----------------- ----------------
Lighting Equipment                                  $284,077      $ 29,479          $  6,458         $ 33,311
Chemical                                             116,744         8,536             2,445            2,307
Textile Rental                                        75,469         6,719             3,632            5,748
Envelope                                              42,636         3,536             1,400            2,369
                                               -------------- ------------- ----------------- ----------------
                                                     518,926        48,270            13,935           43,735
Corporate                                                           (4,998)              509               47
Interest expense, net                                               (2,342)
                                               -------------- ------------- ----------------- ----------------
Total                                               $518,926      $ 40,930          $ 14,444         $ 43,782
                                               ============== ============= ================= ================

  



                                                              Identifiable Assets


                                               ------------------------    -------------------
                                                  November 30, 1999         August 31, 1999
                                               ------------------------    -------------------
                                                                     

Lighting Equipment                                          $1,061,228              $1,073,936
Chemical                                                       229,998                 233,461
Textile Rental                                                 205,238                 203,509
Envelope                                                       141,994                 139,755
                                               ------------------------    -------------------
        Subtotal                                             1,638,458               1,650,661
Corporate                                                       46,766                  45,128
                                               ------------------------    -------------------
        Total                                               $1,685,224              $1,695,789
                                               ========================    ===================





                                                                          Page 7
3.   INVENTORIES

Major  classes of  inventory as of November 30, 1999 and August 31, 1999 were as
follows:



                                              November 30,            August 31,
                                                  1999                   1999
                                             ------------          -------------
                                                             

Raw Materials and Supplies                   $     97,176          $      99,249
Work-in-Process                                    18,709                 16,718
Finished Goods                                    119,024                102,224
                                             ------------          -------------
     Total                                   $    234,909          $     218,191
                                             ============          =============



4.    EARNINGS PER SHARE

The company  accounts  for  earnings  per share  using  Statement  of  Financial
Accounting  Standards  ("SFAS")  No.  128,  "Earnings  per  Share."  Under  this
statement,  basic  earnings  per share is  computed  by  dividing  net  earnings
available to common stockholders by the weighted average number of common shares
outstanding during the period.  Diluted earnings per share is computed similarly
but reflects the potential  dilution  that could occur if dilutive  options were
exercised.  The following table  calculates  basic earnings per common share and
diluted earnings per common share at November 30:



                                                                             Three Months Ended
                                                                                November 30
                                                                       -------------------------------
                                                                           1999              1998
                                                                       -------------      ------------
                                                                                    
Basic earnings per common share:
      Net income                                                       $      24,390      $     25,704
      Basic weighted average shares outstanding (in thousands)                40,584            41,407
                                                                       -------------      ------------
      Basic earnings per common share                                  $         .60      $        .62
                                                                       =============      ============

Diluted earnings per common share:
      Net income                                                       $      24,390          $ 25,704

      Basic weighted average shares outstanding (in thousands)                40,584            41,407
           Add - Shares of common stock issuable upon
           assumed exercise of dilutive stock options (in thousands)             102               207
                                                                       -------------      ------------
      Diluted weighted average shares outstanding (in thousands)              40,686            41,614
                                                                       -------------      ------------
      Diluted earnings per common share                                $         .60      $        .62
                                                                       =============      ============


5.    COMPREHENSIVE INCOME

The company adopted SFAS No. 130, "Reporting Comprehensive Income," in the first
quarter of fiscal 1999.  SFAS No. 130 requires the reporting of a measure of all
changes in equity of an entity  that  result from  recognized  transactions  and
other economic events other than  transactions  with owners in their capacity as
owners.  Other  comprehensive  income (loss) for the quarters ended November 30,
1999 and 1998  includes  only  foreign  currency  translation  adjustments.  The
calculation of comprehensive income is as follows:


                                                 Three Months Ended
                                                     November 30
                                             ----------------------------
                                                 1999             1998
                                             -----------      -----------
                                                        

Net income                                   $    24,390        $  25,704
Other comprehensive income (loss)                    (10)           2,033
                                             -----------      -----------
      Comprehensive Income                   $    24,380         $ 27,737
                                             ===========      ===========


6.    ENVIRONMENTAL MATTERS

The company's operations,  as well as similar operations of other companies, are
subject  to  comprehensive  laws and  regulations  relating  to the  generation,
storage,  handling,  transportation,  and disposal of hazardous  substances  and
solid and hazardous wastes and to the remediation of contaminated sites. Permits
and environmental  controls are required for certain of the company's operations
to limit air and water pollution, and these permits are subject to modification,
renewal, and revocation by issuing authorities.  The company believes that it is
in substantial compliance with all material environmental laws, regulations, and
permits.  On an ongoing basis,  the company  incurs capital and operating  costs
relating to environmental  compliance.  Environmental  laws and regulations have
generally  become stricter in recent years, and the cost of responding to future
changes may be substantial.






Page 8

The company's environmental reserves, which are included in current liabilities,
totaled  $10,900  and  $11,000  at  November  30,  1999  and  August  31,  1999,
respectively. The actual cost of environmental issues may be substantially lower
or higher than that reserved due to the  difficulty  in  estimating  such costs,
potential changes in the status of government regulations,  and the inability to
determine  the  extent  to which  contributions  will be  available  from  other
parties.  The company does not believe that any amount of such costs below or in
excess of that accrued is reasonably estimable.

Certain  environmental  laws,  such as Superfund,  can impose  liability for the
entire cost of site  remediation  upon each of the  current or former  owners or
operators  of a site or  parties  who sent  waste to a site where a release of a
hazardous  substance has occurred  regardless of fault or the  lawfulness of the
original disposal activity.  Generally,  where there are a number of potentially
responsible  parties  ("PRPs") that are financially  viable,  liability has been
apportioned  based on the type and amount of waste  disposed of by each party at
such  disposal  site and the number of  financially  viable  PRPs,  although  no
assurance can be given as to any particular site.

The company is currently a party to, or otherwise involved in, legal proceedings
in connection with several state and federal  Superfund  sites, two of which are
located on property owned by the company. Except for the Crymes Landfill and M&J
Solvents matters in Georgia, the company believes its liability is de minimis at
each of the sites which it does not own where it has been named as a PRP. At the
Crymes  Landfill  and M&J  Solvents  sites in  Georgia,  since the  matters  are
currently  in the  investigative  phase,  the company  does not know whether its
liability is de minimis but  believes  that its exposure at each of the sites is
not  likely to result in a material  adverse  effect on the  company  due to its
limited  involvement  at the sites and the number of viable  PRPs.  For property
which the company owns on Seaboard Industrial Boulevard in Atlanta, Georgia, the
company has  conducted an  investigation  on its and  adjoining  properties  and
submitted  a  Compliance   Status  Report   ("CSR")  to  the  State  of  Georgia
Environmental Protection Division ("EPD") pursuant to the Georgia Hazardous Site
Response Act.  Until EPD's review and approval of the CSR are  completed,  which
are not subject to a  deadline,  the company  will not be able to  determine  if
remediation will be required,  if the company will be solely responsible for the
cost of such remediation, or whether such cost is likely to result in a material
adverse effect on the company. For property which the company owns on East Paris
Street in Tampa, Florida, the company has been requested by the State of Florida
to clean up chlorinated solvent contamination in the groundwater on the property
and on  surrounding  property  known as  Seminole  Heights  Solvent  Site and to
reimburse  approximately  $430 of costs already incurred by the State of Florida
in connection with such contamination. The company believes that it has a strong
defense  due to  likely  off-site  sources  of  the  contamination  and  because
contamination  from the  property,  if any,  was due to prior owners and not the
company's  operations.  At this time,  it is too early to quantify the company's
potential exposure or the likelihood of an adverse result.

The company is currently evaluating emissions of volatile organic compounds from
its manufacturing  operations in the Atlanta,  Georgia area to determine whether
it will need to install  pollution control equipment or modify its operations to
comply  with  federal  and state air  pollution  regulations.  Until the current
evaluations are completed, the company is not able to quantify the possible cost
of compliance.  However, based upon currently available information, the company
does not expect  that any  material  expenditures  will be  required  to achieve
compliance.

In connection with the sale of the North Bros.  business and 29 of the company's
textile  rental  plants  in  1997,   the  company  has  retained   environmental
liabilities  arising  from events  occurring  prior to the  closing,  subject to
certain  exceptions.  The  company  has  received  notice  from the buyer of the
textile rental plants of the alleged presence of perchloroethylene contamination
on one of the properties involved in the sale. The company has since asserted an
indemnification claim against the company from which it bought the property. The
prior owner is currently conducting an investigation of the contamination at its
expense,  subject to a reservation  of rights.  At this time, it is too early to
quantify the company's  potential  exposure in this matter, the likelihood of an
adverse result,  or the  possibility  that the company may be fully or partially
indemnified.

The State of New York has filed a lawsuit against the company  alleging that the
company is responsible as a successor to Serv-All  Uniform Rental Corp. for past
and future response costs in connection  with the release or threatened  release
of hazardous substances at and from the Blydenburgh Landfill in Islip, New York.
The company believes that it is not a successor to Serv-All Uniform Rental Corp.
and therefore has no liability with respect to the Blydenburgh Landfill,  and it
has responded to the lawsuit accordingly. At this stage of the litigation, it is
too early to quantify the company's  potential  exposure or the likelihood of an
adverse result.

7.    INCREASE IN SHARES AUTHORIZED UNDER LONG-TERM ACHIEVEMENT INCENTIVE PLAN

On January 5, 2000,  the  stockholders  approved an  amendment  to the  National
Service Industries, Inc. Long-Term Achievement Incentive Plan for the benefit of
officers  and  other  key  employees  of  the  company.  In  addition  to  other
modifications,  the  amendment  increases  the number of shares  authorized  for
issuance under the plan from 1,750,000 to 5,750,000.

                                                                          Page 9

                      MANAGEMENT'S DISCUSSION AND ANALYSIS

                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following  discussion  should be read in conjunction  with the  consolidated
financial statements and related notes.


National Service Industries is a diversified  service and manufacturing  company
operating in four segments: lighting equipment,  chemicals,  textile rental, and
envelopes.  The company continued to be in solid financial condition at November
30, 1999.  Net working  capital was $275.7  million,  up from $256.5  million at
August 31, 1999,  and the current  ratio was 1.7 compared with 1.6 at August 31,
1999.  At  November  30,  1999,  the  company's  percentage  of  debt  to  total
capitalization remained constant at 47.1 percent.

Results of Operations

National Service Industries generated quarterly revenue of $620.0 million in the
first quarter of fiscal 2000 compared with  quarterly  revenue of $518.9 million
in the first quarter of fiscal 1999.  The increase was primarily due to acquired
revenue in the lighting equipment and envelope segments.  The lighting equipment
segment purchased Holophane  Corporation  ("Holophane") in July 1999 and certain
assets of Peerless  Corporation  ("Peerless")  in April 1999.  In addition,  the
envelope  segment  purchased  substantially  all of Gilmore Envelope in February
1999. For the quarter,  these acquisitions generated a combined $85.0 million of
revenue that was not  included in prior year  results.  Excluding  acquisitions,
revenue increases  related to growth in the company's core businesses  primarily
in the lighting equipment, chemical, and envelope segments.

First quarter net income decreased by 5.1 percent,  or $1.3 million,  from $25.7
million, or $.62 per basic and diluted share, for the quarter ended November 30,
1998 to  $24.4  million,  or $.60 per  basic  and  diluted  share.  Income  from
acquisitions  not  included in prior year  results  and a decrease in  corporate
expenses positively impacted earnings during the first quarter.  However,  these
items were more than offset by  increased  interest  expense on  borrowings  and
amortization  expense  related to recent  acquisitions,  a charge for  closing a
manufacturing  facility in the lighting equipment segment,  and operating profit
decreases in the textile rental and envelope segments.

The lighting  equipment  segment reported record first quarter revenue of $367.6
million,  an increase of 29.4 percent over last year's first quarter  revenue of
$284.1  million.  This increase  resulted  primarily  from the  acquisitions  of
Holophane and Peerless. Additionally,  continued strength in the non-residential
construction  market had a positive impact on first quarter  lighting  equipment
revenue  resulting in growth in the segment's  core business.  Operating  profit
increased 19.7 percent to $35.3 million driven by  contributions  from Holophane
and  Peerless,  offset  somewhat by a $1.0 million  pretax  charge for closing a
manufacturing facility in California.

First quarter chemical  segment revenue of $119.9 million  increased 2.7 percent
from  last  year's  $116.7  million,   primarily  due  to  higher  revenue  from
international  locations and continued  growth in the retail channel.  Operating
profit  increased  1.0  percent  to $8.6  million  primarily  as a result of the
increase in revenue.

Textile  rental  segment  revenue,  representing  all of the  company's  service
revenues,  increased 3.0 percent to $77.7 million. The current year increase was
primarily  related to acquired  revenue and  increased  revenue in the segment's
base business  resulting from price increases and improved  customer  retention.
Operating  profit  decreased $1.6 million from $6.7 million in the first quarter
of fiscal 1999 to $5.1 million in the first three months of fiscal 2000.  Higher
delivery  costs,  the  negative  impact of two  hurricanes,  and  contract  wage
increases  for  production  employees  more than offset the increase in revenue.
Excluding unusual items in both periods, operating profit decreased 8.3 percent.
During the quarter,  fiscal 1997 restructuring reserves were reduced by payments
of $.2 million and $.1 million  related to severance and union related costs and
exit costs, respectively.

Envelope  segment  revenue  increased  28.5  percent  to  $54.8  million,  while
operating  profit  decreased  13.2 percent to $3.1 million from the prior year's
$3.5  million.  Revenue  increased due to additional  sales  resulting  from the
Gilmore  Envelope  acquisition and continued volume growth in the base business.
Operating  margins decreased from 8.3 percent during the first quarter of fiscal
1999 to 5.6  percent in the first  quarter  of fiscal  2000 as a result of lower
average  margins  from prior year  acquisitions,  higher paper prices which were
passed on to customers, and depreciation from a new enterprise resource planning
system.

Corporate  expenses  decreased to $2.3 million  primarily due to lower incentive
compensation  expense.  Net  interest  expense  increased  $7.6 million to $10.0
million  in the  quarter  ended  November  30,  1999 as a  result  of  increased
borrowings to finance acquisitions. Additionally, the provision for income taxes
was 38.8 percent of pretax income for the quarter  compared with 37.2 percent in
the  prior-year  period  primarily  due to goodwill  acquired  in the  Holophane
purchase, which is not deductible for tax purposes.

Page 10

Liquidity and Capital Resources

Operating Activities

Operations  provided  cash of $29.7  million  during the first quarter of fiscal
2000 compared with $46.0  million  during the first quarter of fiscal 1999.  The
2000 cash flow was lower primarily because of a decrease in current  liabilities
related to incentive  plan  payments and  decreases in accounts  payable.  These
payments were offset somewhat by a decrease in accounts receivable, primarily in
the lighting equipment segment.

Investing Activities

Investing  activities  used cash of $34.3  million  for the three  months  ended
November 30, 1999  compared  with cash used of $41.4 million in the three months
ended November 30, 1998. The change in investing cash flows relates primarily to
a decrease in  acquisition  spending  from $28.5 million  during the  prior-year
first  quarter to $14.0  million  during the first three  months of fiscal 2000.
Acquisition  spending during the first quarter of fiscal 2000 related  primarily
to Holophane.  The company  purchased  Holophane in July 1999 for  approximately
$470.8  million,   including   approximately  $20  million  for  the  payoff  of
Holophane's  existing debt. Of the total purchase price, $454.6 million was paid
during  fiscal 1999 and $13.2  million was paid during the first  quarter of the
current year,  which was  primarily  for the purchase of the remaining  tendered
Holophane shares. Other acquisition spending during the first quarter related to
several minor  purchases in the textile rental segment.  Prior year  acquisition
spending of $28.5 million was primarily due to the lighting equipment  segment's
purchase   of   certain   assets   of  GTY   Industries,   a   manufacturer   of
architectural-grade  light  fixtures for  landscape,  in-grade,  and  underwater
applications.

Capital  expenditures  were $21.8  million in the first  three  months of fiscal
2000,  compared  with $15.3  million in the first three  months of fiscal  1999.
Capital  spending  during  the  first  quarter  of  fiscal  2000  was  primarily
attributable to the lighting equipment,  envelope,  and textile rental segments.
The lighting equipment segment invested in land, buildings,  and equipment for a
new plant in Mexico and in  manufacturing  upgrades  and  improvements.  Capital
expenditures in the envelope segment related  primarily to new folding capacity.
The textile rental segment's expenditures related to replacing old equipment and
delivery  truck   refurbishments.   The  lighting  equipment  segment's  capital
expenditures in the prior-year first quarter related to upgrading of old tooling
equipment as well as purchases of new tooling equipment for capacity  expansion.
Textile rental segment  expenditures were for  implementation of new technology,
production  enhancements,  and delivery truck purchases and refurbishments.  The
envelope  segment's  expenditures  related  primarily  to new folding  capacity,
manufacturing process improvements, and information systems. Management believes
current cash balances,  anticipated  cash flows from  operations,  and available
funds from the commercial paper program or the committed credit facilities,  and
the  complementary  lines of credit are sufficient to meet the company's planned
level of capital spending and general  operating cash  requirements for the next
twelve months.

Financing Activities

Cash provided by financing  activities  was $3.9 million in the first quarter of
fiscal 2000  compared with cash provided of $8.2 million in the first quarter of
fiscal 1999. For the quarter ended November 30, 1999, the company  increased net
borrowings  by $15.7  million  primarily  under its  commercial  paper  program,
compared with additional net borrowings of $28.4 million in the first quarter of
fiscal 1999.  Current year borrowings were used for general corporate  purposes,
including  working capital  requirements,  capital  expenditures,  and financing
acquisitions.  At November  30,  1999 and August 31,  1999,  approximately  $250
million in commercial  paper was  classified as long-term as the company has the
ability and the intent to refinance the  commercial  paper on a long-term  basis
when market conditions are appropriate.  Funds borrowed during the first quarter
of fiscal 1999 were used primarily to finance  acquisitions,  share repurchases,
and internal growth.  Net cash received in connection with issuances of treasury
stock  provided cash of $1.2 million in the current  quarter while net purchases
of  treasury  stock used cash of $7.3  million in the same  quarter of the prior
year. The company suspended its share repurchase program in the third quarter of
fiscal  1999.  Although  the  company  has a standing  annual  authorization  to
repurchase  2.0 million  shares plus the number of new shares  issued in any one
year, the company does not plan to purchase  additional shares until its debt to
capitalization  is within the  company's  stated  objective of 30 to 40 percent.
Dividend  payments totaled $13.0 million,  or 32 cents per share,  compared with
$12.9 million,  or 31 cents per share, for the prior-year  period. On January 5,
2000, the regular quarterly  dividend rate was increased 3.1 percent to 33 cents
per share, or an annual calendar year rate of $1.32 per share.

Environmental Matters

See  Note  6:   Environmental   Matters  for  a  discussion   of  the  company's
environmental issues.

                                                                         Page 11
Impact of the Year 2000 Issue

The "Year  2000  Issue"  resulted  from the use of two digits  rather  than four
digits to define the  applicable  year in certain  computer  programs.  With the
millennium,   any  of  the  company's   computer  programs  that  had  two-digit
date-sensitive  software could have  interpreted a date of "00" as the year 1900
rather  than the year  2000.  This could have  resulted  in a system  failure or
miscalculation  causing  disruption  of the  operation of computer  hardware and
software,  as well as intelligent  manufacturing  equipment and  processes,  and
telephony.

Management addressed the Year 2000 Issue in four phases: awareness,  assessment,
action plan, and plan  implementation.  All phases of the plan were complete and
all mission  critical  systems were in  compliance  prior to the end of calendar
year 1999.  The total cost incurred in  connection  with the Year 2000 Issue was
approximately   $6  million  and  was  funded  through   operating  cash  flows.
Approximately one-third of the total cost reflected the redeployment of existing
internal  information  technology  resources  and  was  not  incremental  to the
company.

As of January 14, 2000, all of the company's  mission critical systems have been
tested and are fully  operational.  The company did not experience,  nor does it
expect to experience,  significant  disruptions to its mission  critical systems
related to the Year 2000 Issue.  There can be no assurance,  however,  that such
exposures or the costs of remediating any problems associated therewith will not
materially affect the company's future business, financial condition, or results
of operations.

Quantitative and qualitative disclosures about market risk

The company is exposed to market risks that may impact the Consolidated  Balance
Sheets,  Consolidated  Statements of Income, and Consolidated Statements of Cash
Flows due to changing  interest rates and foreign  exchange  rates.  The company
does not currently  participate in any significant hedging activities,  nor does
it utilize any  significant  derivative  financial  instruments.  The  following
discussion provides additional information regarding the company's market risks.

Interest Rates- Interest rate  fluctuations  expose the company's  variable-rate
debt to changes in interest expense and cash flows. The company's  variable-rate
debt,  primarily  commercial  paper,  amounted to $402.8 million at November 30,
1999.  Based on  outstanding  borrowings  at quarter  end, a 10 percent  adverse
change in effective  market  interest rates at November 30, 1999 would result in
additional annual after-tax interest expense of approximately  $1.6 million.  To
address this risk, the company intends to refinance  approximately  $250 million
of the outstanding commercial paper on a long-term, fixed-rate basis. Although a
fluctuation  in interest rates would not affect  interest  expense or cash flows
related to the  company's  $160  million  publicly  traded  notes,  a 10 percent
adverse  change in effective  market  interest  rates at November 30, 1999 would
decrease the fair value of these notes to approximately $138.0 million.

Foreign  Exchange  Rates-The  majority of the company's  revenue,  expense,  and
capital  purchases are  transacted  in U.S.  dollars.  International  operations
during the first quarter of fiscal 2000, primarily in the lighting equipment and
chemical  segments,  represented  approximately 9.8 percent of sales and service
revenues,   7.1  percent  of  operating  profit  (loss),   and  8.6  percent  of
identifiable  assets.  The company does not believe a 10 percent  fluctuation in
average foreign  currency rates would have a material effect on its consolidated
financial statements or results of operations.

Cautionary Statement Regarding Forward-Looking Information

From time to time, the company may publish  forward-looking  statements relating
to such  matters  as  anticipated  financial  performance,  business  prospects,
capital expenditures,  technological  developments,  new products,  research and
development  activities,  and similar matters. The Private Securities Litigation
Reform  Act of 1995  provides  a safe  harbor  for  forward-looking  statements.
Statements  herein  which  may  be  considered   forward-looking   include:  (a)
statements  made regarding the company's  current  expectations  or beliefs with
respect  to  the  outcome  and  impact  on  the  company's  business,  financial
condition,  or results of  operations  of the Year 2000 Issue and  environmental
issues and (b) statements made regarding management's intentions or expectations
with regard to future  earnings,  projected  capital  expenditures,  future cash
flows,  debt  refinancing,   share  repurchases,   and  debt  to  capitalization
objectives.  The  company  notes  that a  variety  of  factors  could  cause the
company's   actual  results  and  experience  to  differ   materially  from  the
anticipated   results  or  other   expectations   expressed  in  the   company's
forward-looking  statements.  The risks and  uncertainties  that may  affect the
operations,  performance,  development,  and results of the  company's  business
include  without  limitation  the  following:  (a) the  uncertainty  of  general
business and economic  conditions,  including  the  potential  for a slowdown in
non-residential  construction awards, fluctuations in commodity and raw material
prices,  market  demand for public  debt,  interest  rate  changes,  and foreign
currency  fluctuations;  and (b) the ability to achieve financing objectives and
strategic initiatives, including but not limited to the achievement of synergies
related to acquisitions  and the achievement of sales growth across the business
segments through a combination of increased  pricing,  enhanced sales force, new
products, improved customer service, and acquisitions.




Page 12


                           PART II. OTHER INFORMATION

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

At the annual  meeting of  stockholders  held January 5, 2000,  all nominees for
director were elected to the board without  opposition  and Arthur  Andersen LLP
was appointed as  independent  auditor for the current fiscal year. In addition,
stockholders voted on the following:



                                                                                Votes Cast
                                                      ----------------------------------------------------------------
                                                          Affirmative               Negative            Abstentions
                                                                                               

    Proposal to approve the amended and restated
    National Service Industries, Inc. Long-Term
    Achievement Incentive Plan                             23,995,265              3,988,112            989,912




Item 6. Exhibits and Reports on Form 8-K

(a) Exhibits are listed on the Index to Exhibits (page 14).

(b) Form 8-K/A was filed on October 12, 1999 with regard to the  acquisition  of
    Holophane Corporation.






                                                                         Page 13


                                   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.


                                     NATIONAL SERVICE INDUSTRIES, INC.
                                                 REGISTRANT


DATE  January 14, 2000                /s/ DAVID LEVY
                                                 DAVID LEVY
                                    EXECUTIVE VICE PRESIDENT, ADMINISTRATION
                                                 AND COUNSEL



DATE  January 14, 2000                /s/ BROCK HATTOX
                                               BROCK HATTOX
                                         EXECUTIVE VICE PRESIDENT AND
                                           CHIEF FINANCIAL OFFICER






Page 14



                                INDEX TO EXHIBITS


                                                                                                          Page No.

                                                                                                    

EXHIBIT 3                  (a)    By-Laws as Amended and Restated January 5, 2000                         15

EXHIBIT 10(iii)A           (1)    Second Amendment  to the National Service Industries, Inc. 1992         32
                                  Nonemployee Directors' Stock Option Plan, Dated January 5, 2000

                           (2)    Second Amendment of Aspiration Achievement Incentive Award Agreement    33
                                  for the Performance Cycle Ended August 31, 1999 between National
                                  Service Industries, Inc. and
                                  (a)   James S. Balloun
                                  (b)   Brock A. Hattox
                                  (c)   David Levy
                                  (d)   Stewart A. Searle III

                           (3)    Amendment of the Aspiration Achievement Incentive Award Agreement and   34
                                  Election Form for the Performance Cycle Ending August 31, 2000 between
                                  National Service Industries, Inc. and
                                  (a)   James S. Balloun
                                  (b)   George H. Gilmore, Jr.
                                  (c)   Brock A. Hattox
                                  (d)   David Levy
                                  (e)   Stewart A. Searle III

                           (4)    Amendment of the Aspiration Achievement Incentive Award Agreement for   39
                                  the Performance Cycle Ending August 31, 2001 between National Service
                                  Industries, Inc. and
                                  (a)   James S. Balloun
                                  (b)   George H. Gilmore, Jr.
                                  (c)   Brock A. Hattox
                                  (d)   David Levy
                                  (e)   Stewart A. Searle III

                                  [a confidential portion of which has been omitted and filed separately
                                  with the Securities and Exchange Commission]

                           (5)    National Service Industries, Inc. Long-Term Achievement Incentive Plan  Reference is made to
                                  as Amended and Restated, Effective as of January 5, 2000                Exhibit A of registrant's
                                                                                                          Schedule 14A as filed with
                                                                                                          the  Commission on
                                                                                                          November 22, 1999, which
                                                                                                          is incorporated herein by
                                                                                                          reference.

EXHIBIT 27                        Financial Data Schedule                                                 50