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Exhibit Index on Page 2

                                   FORM 11-K

                                 UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549


Annual Report Pursuant to Section 15(d) of the Securities Exchange Act
of 1934




(Mark One)

  [X]   ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
        EXCHANGE ACT OF 1934.
             For the fiscal year ended:  December 31, 1997

  OR

  [     ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
        ACT OF 1934.
             For the transition period from       to



Commission file number     1- 3208

  A.    Full title of the plan and the address of the plan, if
        different from that of the issuer named below:

        North Bros., Inc. 401(k) Retirement Plan For
        Field Employees

  B.    Name of issuer of the securities held pursuant to the plan and
        the address of the principal executive office:

        National Service Industries, Inc.
        1420 Peachtree Street, NE
        Atlanta, Georgia 30309



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REQUIRED INFORMATION

The following documents are filed as a part of this report:

1.   Financial Statements


     Plan  financial  statements  prepared  in  accordance  with  the  financial
     reporting requirements of ERISA include the following:

     Report of Independent Public Accountants

     Statements of Net Assets Available for Benefits as of December
     31, 1997 and 1996

     Statement  of Changes  in Net  Assets  Available  for  Benefits,  with Fund
     Information, for the Year Ended December 31, 1997

     Notes to Financial Statements

2.   Exhibits
                                                             Sequentially
                                                               Numbered
     The following exhibit is filed with this report:            Page

     23     Consent of Arthur Andersen LLP                       12



SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
trustees (or other persons who administer  the employee  benefit plan) have duly
caused this annual report to be signed on its behalf by the undersigned hereunto
duly authorized.

                              North Bros., Inc. 401(k) Retirement Plan
                              for Field Employees

Date: June 30, 1997           By:   National Service Industries, Inc.
                                    Plan Administrator

                              By:    /s/ James S. Balloun
                              Name:  James S. Balloun
                              Title: Chairman and Chief Executive Officer

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                                North Bros., Inc.
                   401(k) Retirement Plan for Field Employees

              Financial Statements as of December 31, 1997 and 1996
                                  Together With
                                Auditors' Report


                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS



To the Plan Administrator of
North Bros., Inc. 401(k) Retirement Plan
for Field Employees:


We have audited the accompanying statements of net assets available for benefits
of NORTH BROS.,  INC. 401(k)  RETIREMENT PLAN FOR FIELD EMPLOYEES as of December
31, 1997 and 1996, and the related  statement of changes in net assets available
for benefits, with fund information, for the year ended December 31, 1997. These
financial  statements  are the  responsibility  of the  Plan's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the net assets available for benefits of the Plan as of
December 31, 1997 and 1996, and the changes in net assets available for benefits
for the year ended  December 31, 1997, in  conformity  with  generally  accepted
accounting principles.

As further  discussed in Note 1 to the  accompanying  financial  statements,  on
February 21, 1997, the Plan was terminated.

Our audits  were  performed  for the  purpose of forming an opinion on the basic
financial  statements taken as a whole. The fund information in the statement of
changes in net assets  available  for benefits is  presented  for the purpose of
additional  analysis rather than to present the changes in net assets  available
for  benefits  of each fund.  The fund  information  has been  subjected  to the
auditing procedures applied in the audits of the basic financial statements and,
in our opinion,  is fairly  stated in all  material  respects in relation to the
basic financial statements taken as a whole.



Atlanta, Georgia
May 15, 1998


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                                NORTH BROS., INC.

                   401(k) RETIREMENT PLAN FOR FIELD EMPLOYEES


                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS

                           DECEMBER 31, 1997 AND 1996







                                                              1997          1996


INVESTMENT IN NSI DC TRUST, at fair value (Note 2):
    Balanced Fund.....................................   $     543      $  4,278
    Diversified Equity Fund...........................       4,791         9,628
    Stable Value Fund.................................       2,729         9,642
    NSI Stock Fund....................................         503         4,440
    Loan Fund.........................................           0         2,677
    International Fund................................       2,182         4,704

NET ASSETS AVAILABLE FOR BENEFITS.....................     $10,748       $35,369










        The accompanying notes are an integral part of these statements.

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                                NORTH BROS., INC.

                   401(k) RETIREMENT PLAN FOR FIELD EMPLOYEES

           STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS,
                             WITH FUND INFORMATION,

                      FOR THE YEAR ENDED DECEMBER 31, 1997






                                                                 Diversified  Stable       NSI
                                                       Balanced    Equity      Value      Stock       Loan  International
                                                        Fund        Fund       Fund        Fund       Fund      Fund        Total
                                                                                                     
PARTICIPANT CONTRIBUTIONS ..........................   $   559    $ 1,133    $ 1,343    $   592    $     0    $   438    $  4,065

NET GAIN (LOSS) FROM INVESTMENT IN NSI DC TRUST ....     1,054      2,837        467      1,270          0        (79)      5,549

BENEFITS PAID TO PARTICIPANTS ......................    (5,348)    (8,955)    (8,723)    (5,852)    (2,422)    (2,935)    (34,235)

INTRAPLAN TRANSFERS ................................         0        148          0         53       (255)        54           0

NET (DECREASE)......................................    (3,735)    (4,837)    (6,913)    (3,937)    (2,677)    (2,522)    (24,621)


NET ASSETS AVAILABLE FOR BENEFITS, December 31, 1996     4,278      9,628      9,642      4,440      2,677      4,704      35,369

NET ASSETS AVAILABLE FOR BENEFITS, December 31, 1997   $   543    $ 4,791    $ 2,729    $   503    $     0    $ 2,182    $ 10,748








         The accompanying notes are an integral part of this statement.

                               
Page 6



                                NORTH BROS., INC.

                   401(k) RETIREMENT PLAN FOR FIELD EMPLOYEES


                          NOTES TO FINANCIAL STATEMENTS

                           DECEMBER 31, 1997 AND 1996



 1.  PLAN DESCRIPTION

     The following brief  description of the North Bros., Inc. 401(k) Retirement
     Plan for  Field  Employees  (the  "Plan")  is  provided  for  informational
     purposes  only.  Participants  should refer to the plan  agreement for more
     complete information. North Bros., Inc. (the "Company") was a subsidiary of
     National Service Industries, Inc. ("NSI").

     General

     The Plan is a defined  contribution plan established  effective  October 1,
     1995 under the provisions of  Section 401(a)  of the Internal  Revenue Code
     ("IRC").  The Plan covered all  nonunion  employees of the Company who were
     classified as field employees,  who had attained the age of 21, and who had
     completed  12 months of  service,  as  defined.  The Plan is subject to the
     provisions  of the Employee  Retirement  Income  Security  Act of 1974,  as
     amended.

     Plan Termination

     The  Plan  was  amended,  effective  February 21,   1997,  to  suspend  all
     contributions  to the Plan and to  terminate  the  Plan.  All  participants
     became  fully  vested.  In addition,  North Bros.,  Inc. was sold by NSI to
     Performance  Contracting  Group,  Inc.,  and all  employees  of the Company
     became employees of Performance  Contracting Group, Inc. The Plan is in the
     process of distributing amounts to participants.

     Contributions

     Participants  could elect to  contribute  between 1% and 15% of  before-tax
     compensation,  as defined in the Plan, subject to certain limitations under
     the IRC. Matching  contributions could be made at the Company's discretion,
     but  none  were  made  in  1997.  Additional  discretionary  profit-sharing
     amounts,  as  determined  by the  board  of  directors  of  NSI,  could  be
     contributed by the Company, but none were made in 1997.

Page 7



     Vesting

     Participants  were always fully vested in their  individual  contributions.
     Vesting of employer  contributions occurred on an increasing scale, ranging
     from 20% vesting  after one year of service,  as defined,  to 100%  vesting
     after five years of service. Nonvested employer contributions are forfeited
     upon a participant's withdrawal from the Plan and are used to reduce future
     employer contributions or to offset the operational expenses of the Plan.

     Administration

     All administrative expenses of the Plan were paid by the Company during the
     year ended December 31, 1997.

     Participants' Accounts

     Individual  accounts are maintained for each of the Plan's  participants to
     reflect the particular  participant's  contributions  and related  employer
     contributions as well as the  participant's  share of the Plan's income and
     any related investment management fees and expenses.

     The Plan's investment fund balances are expressed in units. At December 31,
     1997 and 1996, 1,063 and 5,734 units,  respectively,  were assigned to plan
     participants.  Unit  values  for each  investment  fund were as  follows at
     December 31, 1997 and 1996:

                                                   1997       1996

         Balanced Fund ...................    $   33.18  $   26.40
         Diversified Equity Fund .........        14.04      12.05
         Stable Value Fund ...............        12.07      11.31
         NSI Stock Fund ..................        19.61      14.52
         International Fund ..............         4.82       5.01
                         

     Investment in Master Trust

     Under a trust agreement dated September 1,  1993, as amended, Wachovia Bank
     of Georgia,  N.A.  was  appointed  trustee of the NSI Defined  Contribution
     Plan's  Master  Trust  (the "NSI DC  Trust").  Effective  January 1,  1998,
     INVESCO Trust Company has been appointed trustee of the NSI DC Trust.

     The Plan's  assets are  commingled  in the NSI DC Trust  together  with the
     assets of certain defined  contribution  plans of other NSI divisions.  The
     investments  of the NSI DC Trust  are  subject  to  certain  administrative
     guidelines  and  limitations  as to type and  amount  of  securities  held.
     Certain  fund  assets are  allocated  to  selected  independent  investment
     managers to invest under these general guidelines.

     Investment Options

     The  separate  investment  options  made  available  under  the Plan may be
     changed,  eliminated,  or  modified  from  time to  time by the  investment
     committee  of the NSI DC Trust.  Participants  could make their  investment
     elections in 5% increments, with changes allowed on a daily basis.

Page 8



     The separate investment options offered by the Plan were as follows:

o    Diversified  Equity Fund. This fund is a diversified stock fund designed to
     invest in a broad range of common stocks providing capital growth.

o    Stable Value Fund. This is a fixed income fund designed to provide a steady
     level of current income while focusing on preservation of principal.

o    Balanced  Fund.  This fund is  invested in a changing  mix of  high-quality
     stocks and  bonds.  The fund is  designed  to  provide  capital  growth and
     current income while limiting the risk of principal loss.

o    NSI Stock Fund. This fund is invested in NSI common stock,  although it may
     hold other short-term  investments from time to time. A participant may not
     direct  more than 50% of his/her  account  balance to be  invested  in this
     fund.

o    International  Fund.  This  fund  is  invested  in the  stock  of  non-U.S.
     companies and is designed to provide long-term growth.

     Loans to Participants

     Prior  to  the  termination  of the  Plan,  the  Plan  permitted  loans  to
     participants  up to the  lesser of 50% of a  participant's  vested  account
     balance  or  $50,000.  A  participant  had up to five  years to  repay  the
     principal and  interest,  unless the loan was for the purchase of a primary
     residence,  in which case the repayment  period was established at the time
     the loan was approved.  Loan processing  fees were charged  directly to the
     participant's  account.  Interest rates on loans to participants were based
     on market rates, as determined by the plan administrator. The interest rate
     as of December 31, 1997 was 9.5%.

     Loan issuances and  repayments  are included in intraplan  transfers in the
     accompanying  statement of changes in net assets  available  for  benefits.
     Interest  on loans is included  in the net gain from  investment  in NSI DC
     Trust and is  allocated  to each  investment  fund  based on  participants'
     investment elections.

     Benefits

     Prior to the termination of the Plan, a participant was entitled to receive
     the distribution of his/her vested account balance upon death,  disability,
     or retirement (age 65). These benefits were payable in a lump-sum amount or
     could be paid in  installments  at the  participant's  election  if his/her
     vested  balance was greater  than $3,500 and he/she was age 55 or older.  A
     participant  who terminated  employment  with the Company for reasons other
     than these was entitled to receive his/her  contributions  in a lump sum as
     soon as administratively feasible.

     Benefits  are payable in cash,  except that any portion of a  participant's
     account  balance which is invested in the NSI Stock Fund is  distributed in
     the form of shares of NSI common  stock,  with  fractional  shares  paid in
     cash. If the equivalent number of shares to be distributed to a participant
     is less than 100, then the participant may elect to receive cash instead of
     shares as his/her distribution.

Page 9



   
  2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     Basis of Accounting

     The accounts of the Plan are maintained by the trustee on the cash basis of
     accounting.  The accompanying financial statements have been prepared using
     the accrual method of accounting by application of memorandum entries.  The
     preparation of financial  statements in conformity with generally  accepted
     accounting  principles  requires the Plan's management to use estimates and
     assumptions   that  affect  the  accompanying   financial   statements  and
     disclosures. Actual results could differ from these estimates.

     Investment Valuation

     Investments  of the NSI DC  Trust,  except  for the  guaranteed  investment
     contracts ("GICs"),  are stated at fair value, as determined by the trustee
     from quoted market  prices.  Securities  traded on a national  exchange are
     valued at the last  reported  sales price on the last  business  day of the
     plan year;  investments  traded in the  over-the-counter  market and listed
     securities  for which no sale was reported on the last day of the plan year
     are valued at the last reported bid price.

     GICs  included  in the NSI DC Trust  are fully  benefit-responsive  and are
     therefore  carried at contract  value (cost plus  accrued  interest) in the
     accompanying   financial   statements  in  accordance   with  Statement  of
     Position 94-4.  At December 31,  1997 and 1996, contract value approximates
     fair value. At December 31,  1997, the weighted average crediting  interest
     rate was 7.0%.  For the year ended  December 31,  1997, the annual yield on
     the GICs held by the NSI DC Trust was 6.9%. For certain of the GICs held by
     the NSI DC Trust, crediting interest rates may be changed if certain events
     occur, such as early retirements,  plant closings, etc., but in no case are
     adjusted  to a rate less than 0%.  GICs are subject to credit risk based on
     the  ability  of the  insurance  company  to  meet  interest  or  principal
     payments, or both, as they become due.

     Certain GICs included in the NSI DC Trust are  synthetic;  that is, the NSI
     DC Trust owns certain  fixed  income  securities,  and the contract  issuer
     provides a "wrapper"  that  guarantees  a fixed rate of return and provides
     benefit responsiveness.  At December 31,  1997, the value of the underlying
     assets of the synthetic GICs (determined from quoted market prices) and the
     value of the related  wrapper  contracts were  $42,945,334  and $(825,875),
     respectively.


Page 10



 3.  NSI DC TRUST

     Investment Income

     Investment income of the NSI DC Trust for the year ended December 31,  1997
     is summarized as follows:

         Dividends on common stock .............................$    454,559
         Interest income .......................................   4,303,571
         Net appreciation in fair value of NSI common stock ....   4,046,711
         Net income from common/collective trust ...............  18,537,212
         Net income from mutual funds ..........................  14,708,000
         Net loss from pooled separate account .................    (104,200)
                       Total investment income .................$ 41,945,853

            
     The investment  income of the NSI DC Trust for the year ended  December 31,
     1997 is allocated among participating plans as follows:

         North Bros.,  Inc.  401(k)  
           Retirement Plan for Field Employees...................     $ 5,549
           All other NSI plans...................................  41,940,304 
           Total................................................. $41,945,853

            
     Net Assets

     The net assets of the NSI DC Trust are as follows at December 31,  1997 and
     1996:

                                                   1997                1996

         Mutual funds .....................    $  79,312,170    $  63,411,122
         Common/collective trust ..........       79,112,333       57,558,795
         Guaranteed investment contracts ..       52,443,357       55,187,898
         NSI-common stock .................       18,045,789       11,279,289
         Loans receivable from participants        7,564,684        6,828,607
         Money market fund ................        1,740,602        3,704,985
         Pooled separate account ..........        2,385,857        2,723,094
                                                 240,604,792      200,693,790
         Cash .............................            9,476           13,342
                                                 240,614,268      200,707,132
         Accrued investment income ........          112,870          100,534
         Adjustments for pending trades ...         (199,191)        (223,542)
         Other ............................          (47,759)         (54,239)
         Net assets .......................    $ 240,480,188    $ 200,529,885


Page 11


     The allocation of the net assets of the NSI DC Trust to participating plans
     is based on participant units and is as follows as of December 31, 1997 and
     1996:

                                             1997                   1996
                                        Amount   Percent       Amount   Percent

North Bros., Inc. 401(k) Retirement
       Plan for Field Employees ...   $     10,748     0%   $     35,369     0%
       All other plans.............    240,469,440   100     200,494,516   100
              Total ...............   $240,480,188   100%   $200,529,885   100%




     Investment in NSI Common Stock

     As  of   December 31,   1997  and  1996,   approximately   7.5%  and  5.6%,
     respectively,  of the NSI DC Trust's net assets were invested in the common
     stock of NSI, a party in interest to the Plan.


 4.  TAX STATUS

     The Plan has  received a favorable  determination  letter from the Internal
     Revenue  Service  ("IRS")  dated  April 1,  1997  stating that the Plan was
     designed in accordance  with plan design  requirements as of that date. The
     plan  administrator  believes  that the Plan is  currently  designed and is
     being operated in compliance  with the applicable  requirements of the IRC.
     Therefore,  the plan administrator believes that the Plan was qualified and
     that the related trust was tax-exempt as of December 31, 1997 and 1996.

     The Plan has received a favorable  determination  letter from the IRS dated
     July 2,  1997 stating that the  termination  of the Plan  (Note 1) does not
     adversely affect its qualification.