SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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

                                   FORM 8-K/A


                               AMENDMENT NO. 1 TO
                                 CURRENT REPORT


                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

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


                    Date of Report
                   (Date of earliest
                    event reported):        August 2, 1999


                             A. O. Smith Corporation
             (Exact name of registrant as specified in its charter)


            Delaware                   1-475                 39-0619790
         (State or other           (Commission File        (IRS Employer
          jurisdiction of             Number)              Identification No.)
          incorporation)


                P.O. Box 245009, Milwaukee, Wisconsin 53224-9509
          (Address of principal executive offices, including zip code)


                                 (414) 359-4000
                         (Registrant's telephone number)


                                                                               1



A. O. Smith  Corporation  (the  Company)  hereby  amends Item 7 of the Company's
Current  Report  on Form 8-K dated  August  2,  1999,  reporting  the  Company's
acquisition  of  substantially  all of the  assets of the motors  business  (the
Motors  Business)  of  MagneTek,   Inc.  (MagneTek)  to  include  the  requisite
historical  financial  statements of the Motors Business and pro forma financial
statements of the Company. The complete text of Item 7 as amended is as follows:

Item 7 - Financial Statements, Pro Forma Financial Statements and Exhibits

     (a) Financial Statements of Business Acquired

     Financial statements of MagneTek's Motors Business are included as follows:

     As of June 30, 1999, and for the year ended June 30, 1999.
          o    Report of Independent Auditors
          o    Combined  Statement  of Assets,  Liabilities  and Parent  Company
               Investment
          o    Combined  Statement  of  Revenues,  Expenses  and Parent  Company
               Investment
          o    Combined Statement of Cash Flows
          o    Notes to Combined Financial Statements

     (b) Pro Forma Financial Information

     Pro forma financial  statements of A. O. Smith  Corporation are included as
     follows:

     Pro Forma Condensed Consolidated Financial Statements
     o    Condensed  Consolidated Balance Sheet as of June 30, 1999, and related
          notes
     o    Condensed  Consolidated  Statements  of  Earnings  for the year  ended
          December  31,  1998 and six months  ended June 30,  1999,  and related
          notes

     (c) Exhibits

     The exhibits listed in the accompanying  Exhibit Index are filed as part of
     this Current Report on Form 8-K.



                                                                               2



                         Report Of Independent Auditors


The Board of Directors
MagneTek, Inc.


We have audited the accompanying  combined statement of assets,  liabilities and
parent company  investment of the Motors  Business of MagneTek,  Inc. as of June
30, 1999, and the related  combined  statement of revenues,  expenses and parent
company  investment  and cash  flows for the year  ended  June 30,  1999.  These
financial statements are the responsibility of MagneTek, Inc.'s management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audit.

We conducted our audit 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 audit provides a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects, the combined financial position of the Motors Business of
MagneTek,  Inc. as of June 30, 1999, and the combined  results of its operations
and its cash flows for the year then ended in conformity with generally accepted
accounting principles.


                                                              ERNST & YOUNG LLP


Milwaukee, Wisconsin
September 24, 1999



                                                                               3



                         MagneTek, Inc. Motors Business

                  Combined Statement of Assets, Liabilities and
                            Parent Company Investment

                                  June 30, 1999
                             (Dollars in Thousands)


Assets
Current assets:
   Cash                                                             $  6,049
   Trade receivables, net of allowance for
     doubtful accounts of $2,417                                      63,739
   Receivable from affiliated companies                                5,165
   Inventories                                                        58,743
   Other current assets                                                2,330
                                                             -----------------
Total current assets                                                 136,026

Property, plant and equipment, net                                    66,215
Goodwill, net                                                         10,195
Other assets                                                              40
                                                             -----------------
Total assets                                                        $212,476
                                                             =================

Liabilities and parent company investment
Current liabilities:
   Accounts payable                                                 $ 23,433
   Payable to affiliated companies                                     7,013
   Accrued payroll and benefits                                        7,407
   Accrued warranty                                                    4,511
   Accrued income taxes                                                  594
   Other accrued liabilities                                           3,874
                                                             -----------------
Total current liabilities                                             46,832

Deferred income taxes                                                     45

Commitments and contingencies (Note 6)

Parent company investment                                            165,599
                                                             -----------------
Total liabilities and parent company investment                     $212,476
                                                             =================


See accompanying notes which are an integral part of these statements.


                                                                               4


                         MagneTek, Inc. Motors Business

                  Combined Statement of Revenues, Expenses and
                            Parent Company Investment

                        For the year ended June 30, 1999
                             (Dollars in Thousands)


Net sales                                                           $382,086
Cost of products sold                                                315,193
                                                             -----------------
Gross profit                                                          66,893

Selling, general and administrative expenses                          45,530
Research and development expenses                                      2,331

Parent company allocations:
   Interest expense                                                   12,019
   Other expense                                                      12,426
                                                             -----------------
Loss before income taxes                                              (5,413)
Income tax benefit                                                    (1,732)
                                                             -----------------
Net loss                                                              (3,681)

Parent company investment, beginning of year                         156,060
Parent company investment activity, net                               13,220
                                                             -----------------
Parent company investment, end of year                              $165,599
                                                             =================



See accompanying notes which are an integral part of these statements.

                                                                               5


                         MagneTek, Inc. Motors Business

                        Combined Statement of Cash Flows

                        For the year ended June 30, 1999
                             (Dollars in Thousands)


Operating activities
Net loss                                                         $  (3,681)
Adjustments to reconcile net loss to net cash provided by
  operating activities:
     Depreciation and amortization                                  13,042
     Changes in other operating items:
       Trade receivables                                            (4,028)
       Receivable from affiliated companies                          3,073
       Inventories                                                  (3,891)
       Other current assets                                           (722)
       Accounts payable                                             (4,775)
       Payable to affiliated companies                               4,944
       Accrued liabilities                                             (47)
                                                             -----------------
Net cash provided by operating activities                            3,915

Investing activities
Capital expenditures                                               (14,854)

Financing activities
Increase in Parent company investment                               13,220

                                                             -----------------
Net increase in cash                                                 2,281
Cash at beginning of year                                            3,768
                                                             -----------------
Cash at end of year                                              $   6,049
                                                             =================


See accompanying notes which are an integral part of these statements.

                                                                               6



                         MagneTek, Inc. Motors Business

                     Notes to Combined Financial Statements

                                  June 30, 1999


1. Basis of Presentation

The accompanying  combined financial  statements  present,  on a historical cost
basis,  the assets,  liabilities,  revenues and  expenses  related to the motors
business (the Motors Business) of MagneTek, Inc. (MagneTek). The Motors Business
consists  of those  assets and  liabilities  of  MagneTek  located in the United
States used in the production and sale of electric  motors and the operations of
six wholly-owned subsidiaries of MagneTek located in Hungary, Mexico, the United
Kingdom,  Canada,  Singapore  and the  Netherlands.  On June 28, 1999,  MagneTek
entered into an Asset  Purchase  Agreement with A. O. Smith  Corporation  (A. O.
Smith or the  Company)  for the sale of its  Motors  Business  (see Note 7). Not
included in the purchase of the Motors  Business,  and therefore,  excluded from
the accompanying combined financial  statements,  are the assets and liabilities
of the generator  business of MagneTek,  which were sold,  effective as of April
26, 1999, to another company.

The financial  information  included  herein  includes  certain  allocations  of
expenses based on historical  data and/or  management's  estimates (see Note 2).
Therefore,  the accompanying  combined financial  statements may not necessarily
reflect the combined financial position,  results of operations or cash flows of
the Motors Business in the future, or the combined financial  position,  results
of operations or cash flows of the Motors Business had it existed as a separate,
stand-alone company during the period presented.

The Motors Business operates in one business segment,  the design,  manufacture,
sale and  distribution  of  fractional,  integral  and direct  current  electric
motors,  which  are sold  throughout  the  United  States  and  several  foreign
countries to a number of customers.

MagneTek uses a fifty-two, fifty-three week fiscal year which ends on the Sunday
nearest June 30. For clarity of presentation,  the combined financial statements
are  presented  as if the year  ended on June 30. All  significant  intercompany
accounts  and  transactions  have  been  eliminated  in the  combined  financial
statements.


                                                                               7


                         MagneTek, Inc. Motors Business

               Notes to Combined Financial Statements (continued)


2. Significant Accounting Policies

Use of Estimates

The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the accompanying  financial statements and notes.
Actual results could differ from those estimates.

Fair Values

The  carrying   amounts  of  cash,   trade   receivables  and  accounts  payable
approximated fair value as of June 30, 1999.

Foreign Currency Translation

For all subsidiaries  outside the United States with the exception of Mexico and
Hungary, the Motors Business uses the local currency as the functional currency.
For these operations, assets and liabilities are translated into U.S. dollars at
year-end   exchange   rates,   and  revenues  and  expenses  are  translated  at
weighted-average   exchange  rates.  Gains  and  losses  from  foreign  currency
transactions are included in net earnings.

Inventory Valuation

Inventories  are carried at lower of cost or market.  Cost is  determined on the
first in, first out method.

Property, Plant and Equipment

Property,  plant and equipment are stated at cost. Depreciation is provided over
the  estimated  useful  lives  of  the  respective  assets  principally  on  the
straight-line  method.  Interest costs capitalized totaled $426,000 for the year
ended June 30, 1999.


                                                                               8


                       MagneTek, Inc. Motors Business

               Notes to Combined Financial Statements (continued)


2. Significant Accounting Policies (continued)

Goodwill

Goodwill,  representing  the  excess  of cost  over  net  assets  of  businesses
acquired,  is stated at cost and is amortized on a  straight-line  basis over 40
years.   Accumulated   amortization   at  June  30,  1999  totaled   $3,253,000.
Amortization  charged to operations totaled $375,000 for the year ended June 30,
1999.

Impairment of Long-Lived Assets

Property,  plant and equipment and goodwill are reviewed for impairment whenever
events or changes in circumstances  indicate that the carrying amount may not be
recoverable. If the sum of the expected undiscounted cash flows is less than the
carrying value of the related asset or group of assets, a loss is recognized for
the difference between the fair value and carrying value of the related asset.

Revenue Recognition

The Motors Business recognizes revenue upon shipment of product to the customer.

Parent Company Allocations

MagneTek has  historically  provided  various  services to the Motors  Business,
including income tax, internal audit, employee benefits, legal, risk management,
strategic and treasury related  services.  Determination of the costs associated
with  these  services  that  relate  directly  to  the  Motors  Business  is not
practicable;  accordingly,  the amounts  presented in the accompanying  combined
financial  statements  related  to  these  services  reflect  estimates,   which
management  of  MagneTek   believes  were  reasonable  and  appropriate  in  the
circumstances. Management of MagneTek does not believe that such estimates would
differ  materially  from actual amounts had it been  practicable to specifically
identify such actual amounts.

In  addition  to the above  allocations,  interest  expense in the  accompanying
combined  financial  statements is allocated to the Motors Business based on the
proportionate  share of the debt  incurred  by  MagneTek on behalf of the Motors
Business to MagneTek's total consolidated debt.


                                                                               9


                       MagneTek, Inc. Motors Business

               Notes to Combined Financial Statements (continued)


2. Significant Accounting Policies (continued)

Research and Development

Research and development costs are charged to expense as incurred.

Derivative Instruments

MagneTek  utilizes  derivative  financial  instruments  to reduce  commodity and
financial  market risks.  Certain of these  instruments are used to hedge copper
material  purchases  and  foreign  currency  exposures  of the Motors  Business.
MagneTek  does not use  derivative  financial  instruments  for  speculative  or
trading purposes.

3. Inventories

Inventories at June 30, 1999, consist of the following (dollars in thousands):

                Finished products                                    $33,977
                Work in process                                       14,736
                Raw materials                                         10,030
                                                             ------------------
                                                                     $58,743
                                                             ==================

4. Property, Plant and Equipment

Property,  plant  and  equipment  at June 30,  1999,  consist  of the  following
(dollars in thousands):

                Land                                                 $   796
                Buildings and improvements                            15,223
                Machinery and equipment                              149,706
                                                             ------------------
                                                                     165,725
                Less accumulated depreciation                        (99,510)
                                                             ------------------
                                                                     $66,215
                                                             ==================


                                                                              10


                       MagneTek, Inc. Motors Business

               Notes to Combined Financial Statements (continued)


5. Income Tax

The domestic  results of operations of the Motors Business have been included in
the consolidated  federal income tax returns of MagneTek and all domestic income
tax payments  have been made by  MagneTek.  The income tax benefit of the Motors
Business for the year ended June 30, 1999 has been determined  using the overall
effective income tax rate of MagneTek for its year ended June 30, 1999. Deferred
income tax assets and  liabilities  related to the temporary  differences of the
domestic  Motors  Business  are recorded by MagneTek and are not included in the
accompanying combined financial statements.

6. Commitments and Contingencies

Pension and Other Postretirement Benefits

Substantially  all domestic salaried and hourly employees of the Motors Business
are covered by defined-benefit  retirement plans and health care plans sponsored
by MagneTek.  Liabilities  in  connection  with such  employee  benefits are not
included in the accompanying combined financial statements.

In connection  with the sale of the Motors Business to A. O. Smith (see Note 7),
A. O. Smith will  provide  the  transferred  employees  with  identical  pension
benefits.  A  determination  shall be made of the accrued  benefits  and related
assets of the  transferred  employees.  A. O. Smith shall pay  MagneTek  for any
excess of  allocated  assets over accrued  benefits or MagneTek  shall pay A. O.
Smith  for  any  excess  of  accrued  benefits  over  allocated  assets  of  the
transferred employees. Such determination has not yet been performed.

A. O. Smith assumed liability for retiree health care benefits in respect of the
transferred employees who were employees of the Motors Business prior to January
1, 1992.

Certain employees of the Motors Business  participate in a  defined-contribution
savings plan  sponsored by MagneTek.  In connection  with the sale of the Motors
Business,  A. O. Smith will provide the  transferred  employees  with  identical
benefits.


                                                                              11


                       MagneTek, Inc. Motors Business

               Notes to Combined Financial Statements (continued)


6. Commitments and Contingencies (continued)

Leases

The Motors  Business  leases  certain  facilities  and  machinery  and equipment
primarily under operating  lease  arrangements.  Rent expense for the year ended
June 30, 1999 totaled $3.4 million.  Future minimum payments under noncancelable
operating  leases as of June 30,  1999,  total $13.7  million and are payable in
future fiscal years as follows:  in 2000-$2.8 million;  in 2001-$2.0 million; in
2002-$1.9   million;   in   2003-$1.9   million;   in   2004-$1.9   million  and
thereafter-$3.2 million.

Environmental and Legal Matters

Prior to its  purchase by  MagneTek in 1986,  Century  Electric,  Inc.  (Century
Electric),  the former parent of the Motors  Business,  acquired a business from
Gould  Inc.  (Gould)  in May 1983  which  included  a  leasehold  interest  in a
fractional   horsepower  electric  motor   manufacturing   facility  located  in
McMinnville,  Tennessee.  In connection with this  acquisition,  Gould agreed to
indemnify Century Electric from and against liabilities and expenses arising out
of the  handling  and  cleanup of certain  waste  materials,  including  but not
limited  to  cleaning  up  any  PCBs  at  the  McMinnville  facility  (the  1983
Indemnity).   Investigation   has  revealed  the  presence  of  PCBs  and  other
substances,  including solvents,  in portions of the soil and in the groundwater
underlying the facility and in certain offsite soil, sediment and biota samples.
Century   Electric  has  kept  the  Tennessee   Department  of  Environment  and
Conservation,   Division  of  Superfund,  apprised  of  test  results  from  the
investigation.  The  McMinnville  plant has been listed as a Tennessee  inactive
hazardous  substance  site,  a report  on that  site has been  presented  to the
Tennessee  legislature  and community  officials and plant  employees  have been
notified of the presence of  contaminants  as described  above.  In 1995,  Gould
completed an interim  remedial  measure of excavating and disposing  onsite soil
containing PCBs. Gould also conducted  preliminary  investigation and cleanup of
certain onsite and offsite contamination.  The cost of any further investigation
and cleanup of onsite and offsite  contamination cannot presently be determined.
Subsequent to year end, MagneTek sold its leasehold  interest in the McMinnville
plant to A. O. Smith (see Note 7) and believes that the costs for further onsite
and  offsite  cleanup  (including  ancillary  costs)  are  covered  by the  1983
Indemnity.   While  MagneTek  believes  that  Gould  will  continue  to  perform
substantially  under its indemnity  obligations,  Gould's substantial failure to
perform  such  obligations  could have a material  adverse  effect on the Motors
Business.


                                                                              12


                       MagneTek, Inc. Motors Business

               Notes to Combined Financial Statements (continued)


6. Commitments and Contingencies (continued)

Due to the nature of its business, the Motors Business has been exposed to other
potential liabilities related to environmental  matters. In addition, the Motors
Business  is  involved  in legal  proceedings  during  the  ordinary  course  of
business.  In the  opinion  of  management  of  MagneTek,  other  than the above
environmental  matter in McMinnville,  Tennessee,  such  environmental and legal
matters  are not  expected  to have a material  impact on the  Motors  Business'
future operating results or financial position.

7. Subsequent Event

On August 2, 1999,  MagneTek  sold the Motors  Business  to A. O. Smith for $253
million subject to certain post closing adjustments.  The sale was made pursuant
to an Asset Purchase  Agreement  between MagneTek and A. O. Smith dated June 28,
1999.



                                                                              13


                             A. O. Smith Corporation
                        Pro Forma Condensed Consolidated
                              Financial Statements
                                   (Unaudited)


The  following  unaudited  pro forma  condensed  consolidated  balance sheet and
statements of earnings (collectively, the Pro Forma Statements) were prepared to
illustrate  the  estimated  effects  of the  acquisition  (the  Acquisition)  of
substantially  all of the assets of the motors business (the Motors Business) of
MagneTek,  Inc.  (MagneTek) by A. O. Smith Corporation (the Company),  as if the
acquisition had occurred for balance sheet presentation  purposes as of June 30,
1999,  and  for  statement  of  earnings  purposes  as of the  beginning  of the
respective periods presented.

The Pro  Forma  Statements  do not  purport  to  represent  what  the  Company's
financial  position or results of  operations  would  actually  have been if the
Acquisition  in fact had occurred as of June 30, 1999, or as of the beginning of
the periods indicated, or to project the Company's financial position or results
of operations for any future date or period.

The pro forma adjustments are based upon available  information and upon certain
assumptions that the Company  believes are reasonable.  The Pro Forma Statements
and  accompanying  notes  should  be read in  conjunction  with  the  historical
consolidated financial statements of the Company, including the notes thereto.

The  Acquisition  will be accounted for using the purchase method of accounting.
The total  purchase  price of $253  million  will be allocated to the assets and
liabilities of the Motors Business based upon their respective fair values, with
the remainder  allocated to goodwill.  For purposes of the Pro Forma Statements,
such allocation has been made based upon valuations and other studies, which may
be subject to  adjustment.  Accordingly,  the  allocation of the purchase  price
included in the  accompanying  Pro Forma  Statements is  preliminary.  The final
values may differ from those set forth in the historical  consolidated financial
statements of the Company and from those set forth herein.



                                                                              14


            Unaudited Pro Forma Condensed Consolidated Balance Sheet

                                  June 30, 1999
                             (Dollars in Thousands)



                                                        Historical
                                             --------------------------------
                                                    The          Motors           Pro Forma
                                                  Company        Business         Adjustments           Pro Forma
                                             -----------------------------------------------------------------------

Assets
Current assets:
                                                                                           
   Cash and cash equivalents                      $ 31,703       $  6,049       $ (35,944)(1,2)        $    1,808
   Receivables                                     165,335         68,904          (5,165)(3)             229,074
   Inventories                                     102,392         58,743             400 (1)             161,535
   Deferred income taxes                            10,343              -               -                  10,343
   Other current assets                              5,932          2,330               -                   8,262
                                             -----------------------------------------------------------------------
Total current assets                               315,705        136,026         (40,709)                411,022

Net property, plant and equipment                  254,482         66,215          14,652 (1)             335,349
Goodwill and other intangibles                     147,827         10,195          97,597 (1,4)           255,619
Other assets                                        89,974             40               - (1,5)            90,014
                                             -----------------------------------------------------------------------
Total assets                                      $807,988       $212,476       $  71,540              $1,092,004
                                             =======================================================================





See  accompanying  notes to unaudited pro forma condensed  consolidated  balance
sheet.


                                                                              15


            Unaudited Pro Forma Condensed Consolidated Balance Sheet

                                  June 30, 1999
                             (Dollars in Thousands)



                                                        Historical
                                             --------------------------------
                                                    The          Motors           Pro Forma
                                                  Company        Business         Adjustments           Pro Forma
                                             -----------------------------------------------------------------------

Liabilities and stockholders' equity
Current liabilities:
                                                                                           
   Trade payables                                $  83,223       $ 30,446        $ (7,013)(3)          $  106,656
   Accrued payroll and benefits                     28,255          7,407               -                  35,662
   Product warranty                                  7,749          4,511               -                  12,260
   Accrued income taxes                              6,063            594               -                   6,657
   Long-term debt due within one year                4,629              -               -                   4,629
   Other current liabilities                        23,609          3,874           7,948 (1)              35,431
                                             -----------------------------------------------------------------------
Total current liabilities                          153,528         46,832             935                 201,295

Long-term debt                                     131,212              -         223,000 (1)             354,212
Other liabilities                                   58,347              -          13,204 (1,5)            71,551
Deferred income taxes                               47,286             45               -                  47,331

Stockholders' equity:
  Class A common stock                              43,668              -               -                  43,668
  Common stock                                      23,816              -               -                  23,816
  Capital in excess of par value                    51,434              -               -                  51,434
  Retained earnings                                519,434              -               -                 519,434
  Accumulated other comprehensive
     income                                         (2,461)             -               -                  (2,461)
  Treasury stock at cost                          (218,535)             -               -                (218,535)
  Parent company investment                              -        165,599        (165,599)(1-5)                 -
                                             -----------------------------------------------------------------------
Total stockholders' equity                         417,615        165,599        (165,599)                417,615
                                             -----------------------------------------------------------------------
Total liabilities and stockholders' equity       $ 807,988       $212,476        $ 71,540              $1,092,004
                                             =======================================================================





See  accompanying  notes to unaudited pro forma condensed  consolidated  balance
sheet.


                                                                              16



        Notes to Unaudited Pro Forma Condensed Consolidated Balance Sheet

                             (Dollars in Thousands)

(1)  On August 2, 1999, the Company acquired substantially all of the assets and
     assumed  certain  liabilities  of the Motors  Business of MagneTek for $253
     million.  The Company funded the  acquisition  through  available cash ($42
     million), proceeds from the issuance of commercial paper ($103 million) and
     borrowings  under a revolving credit facility and available lines of credit
     ($108 million).  The Acquisition will be accounted for by the Company using
     the  purchase  method of  accounting.  The  total  purchase  price  will be
     allocated to assets acquired and liabilities assumed of the Motors Business
     based upon their  respective fair values,  with the remainder  allocated to
     goodwill.  The aggregate  purchase price and its preliminary  allocation to
     the assets and liabilities of the Motors Business are as follows:


     Purchase price                                                    $252,944
     Direct costs of acquisition                                          2,065
                                                                    ------------
     Total purchase price                                              $255,009
                                                                    ============

     The total purchase price is allocated as follows:

       Net assets acquired at historical cost                          $151,547
       Revaluation of inventories                                           400
       Adjustment of property, plant and equipment to
         estimated fair values                                           14,652
       Intangible assets, including assembled workforce
         and customer lists                                              13,554
       Current liabilities established in connection
         with the Acquisition                                            (7,948)
       Long-term liabilities established in connection
         with the Acquisition                                           (11,434)
       Excess purchase price over net assets acquired
         allocated to goodwill                                           94,238
                                                                    ------------
     Total purchase price                                              $255,009
                                                                    ============

(2)  To  eliminate  $3,935 in domestic  cash of the Motors  Business,  which was
     excluded from the Acquisition purchase transaction.

(3)  To  eliminate  receivable  and  payable  balances  due  from/to  affiliated
     companies at June 30, 1999.

(4)  To eliminate  recorded  goodwill of $10,195 of the Motors  Business at June
     30, 1999.

(5)  Represents the assumed liability of $1,770 for retiree health care benefits
     in respect of the  transferred  employees who were  employees of the Motors
     Business  prior to January  1, 1992,  which was  included  on the  MagneTek
     financial  statements  at June 30,  1999.  No amounts have been accrued for
     pension related benefits.


                                                                              17


                   Unaudited Pro Forma Condensed Consolidated
                              Statement of Earnings

                          Year ended December 31, 1998
                (Dollars in Thousands, Except Per Share Amounts)



                                                        Historical
                                             --------------------------------
                                                    The          Motors           Pro Forma
                                                  Company        Business         Adjustments           Pro Forma
                                             -----------------------------------------------------------------------
                                                                                           
Net sales                                         $917,569       $382,086        $      -              $1,299,655
Cost of products sold                              730,543        315,193           1,080 (1)           1,046,816
                                             -----------------------------------------------------------------------
Gross profit                                       187,026         66,893          (1,080)                252,839

Selling, general and administrative
  expenses                                         106,622         47,861           2,625 (1)             157,108
Interest expense                                     6,887         10,990           1,200 (2)              19,077
Interest income                                     (3,828)             -           2,200 (3)              (1,628)
Other expense - net                                  4,382              -               -                   4,382
Parent company allocations                               -          5,345               -                   5,345
                                             -----------------------------------------------------------------------
                                                    72,963          2,697          (7,105)                 68,555
Provision for income taxes                          25,283            863          (2,357)(4)              23,789
                                             -----------------------------------------------------------------------
Earnings before equity in loss of joint
  ventures                                          47,680          1,834          (4,748)                 44,766
Equity in loss of joint ventures                    (3,189)             -               -                  (3,189)
                                             -----------------------------------------------------------------------
Net earnings                                      $ 44,491       $  1,834        $ (4,748)             $   41,577
                                             =======================================================================

Net earnings per share of common stock:
  Basic                                             $ 1.89                                                 $ 1.77
  Diluted                                           $ 1.84                                                 $ 1.72
                                             =============                                             =============



See accompanying notes to unaudited pro forma condensed consolidated  statements
of earnings.

                                                                              18


                   Unaudited Pro Forma Condensed Consolidated
                              Statement of Earnings

                         Six Months ended June 30, 1999
                (Dollars in Thousands, Except Per Share Amounts)




                                                        Historical
                                             --------------------------------
                                                    The          Motors           Pro Forma
                                                  Company        Business         Adjustments           Pro Forma
                                             -----------------------------------------------------------------------
                                                                                             
Net sales                                         $520,106       $201,580        $      -                $721,686
Cost of products sold                              415,847        168,511             540 (1)             584,898
                                             -----------------------------------------------------------------------
Gross profit                                       104,259         33,069            (540)                136,788

Selling, general and administrative
  expenses                                          56,966         24,099           1,315 (1)              82,380
Interest expense                                     4,499          5,880             756 (2)              11,135
Interest income                                       (554)             -             554 (3)                   -
Other expense - net                                  3,539              -               -                   3,539
Parent company allocations                               -          9,350               -                   9,350
                                             -----------------------------------------------------------------------
                                                    39,809         (6,260)         (3,165)                 30,384
Provision for (benefit from) income taxes           14,492         (2,003)         (1,429)(4)              11,060
                                             -----------------------------------------------------------------------
Net earnings (loss)                                $25,317       $ (4,257)       $ (1,736)               $ 19,324
                                             =======================================================================

Net earnings per share of common stock:
  Basic                                             $ 1.09                                                 $ 0.83
  Diluted                                           $ 1.07                                                 $ 0.82
                                             =============                                             =============



See accompanying notes to unaudited pro form condensed  consolidated  statements
of earnings.

                                                                              19


                     Notes to Unaudited Pro Forma Condensed
                       Consolidated Statements of Earnings

                             (Dollars in Thousands)

(1)  Represents  adjustments  to cost of products sold and selling,  general and
     administrative expenses which are comprised of the following:

                                                     Year ended    Six Months
                                                     December 31, ended June 30,
                                                        1998         1999
                                                     ---------------------------

     Depreciation of property, plant and equipment(a)
       Cost of products sold                            $ 9,720      $ 4,860
       Selling, general and administrative expenses       1,080          540
     Elimination of historical depreciation of
       property, plant and equipment
       Cost of products sold                             (8,640)      (4,320)
       Selling, general and administrative expenses        (960)        (480)
     Amortization of identified intangible assets (b)       730          365
     Amortization of goodwill (c)                         2,150        1,075
     Elimination of historical amortization of goodwill    (375)        (185)

     (a)  The valuation of property, plant and equipment is based on preliminary
          estimates  of the fair values of such assets and is subject to change.
          Depreciation is computed over the remaining  estimated useful lives of
          the respective  assets.  The useful lives of assets acquired have been
          conformed to the useful lives used by the Company.

     (b)  Approximately  $10.2 million of the purchase  price has been allocated
          to  identifiable  intangible  assets.  Amortization of such intangible
          assets is based on lives  which are  expected  to range  from 10 to 25
          years.

     (c)  Amortization  of goodwill  is based on a useful life of 40 years.  The
          allocation of the purchase price in excess of net assets acquired will
          differ  from that set  forth  herein  upon  finalization  of  detailed
          valuations and other studies. The amount of the goodwill  amortization
          is an  estimate  and is subject  to change  upon  finalization  of the
          allocation  of  such  excess.  It  is  not  expected  that  the  final
          allocation  of the  purchase  price will differ  materially  from that
          presented herein.

(2)  Represents  incremental  interest  expense based upon the pro forma debt of
     the Company following the Acquisition, at interest rates ranging from 5.66%
     to 5.89%, as if the Acquisition had been consummated as of the beginning of
     the periods presented.


                                                                              20


                     Notes to Unaudited Pro Forma Condensed
                       Consolidated Statements of Earnings

                             (Dollars in Thousands)


(3)  Elimination  of  interest  income as a result of the use of $43  million of
     available cash to fund a portion of the purchase price.

(4)  Represents  adjustment  to the  provision  for income  taxes on a pro forma
     basis to reflect  the  Company's  effective  tax rate of 34.7% for the year
     ended December 31, 1998 and 36.4% for the six months ended June 30, 1999.



                                                                              21



                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  amendment  to be signed on its behalf by the
undersigned hereunto duly authorized.

     Date: October 18, 1999


                                                 A. O. Smith Corporation

                                              By /s/W. David Romoser
                                                 -----------------------------
                                                 Vice President, General
                                                 Counsel and Secretary



                                                                              22


                             A. O. SMITH CORPORATION

                   Exhibit Index to Current Report on Form 8-K
                              Dated August 2, 1999

Exhibit
Number                             Description
- ------                             ------------


(2)       Asset Purchase  Agreement,  dated as of June 28, 1999, among MagneTek,
          Inc.,  MagneTek,  Service (U.K.) Limited and A. O. Smith  Corporation.
          [Previously filed with this Current Report on Form 8-K]

(23)      Consent of Independent Auditors



                                                                              23