<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AS OF SEPTEMBER 30, 1997, AND THE RELATED
CONDENSED CONSOLIDATED STATEMENT OF EARNINGS FOR THE NINE MONTHS THEN ENDED AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH QUARTERLY REPORT ON FORM 10-Q
FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1997.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                          15,045
<SECURITIES>                                         0
<RECEIVABLES>                                  182,216
<ALLOWANCES>                                     5,352
<INVENTORY>                                    128,747
<CURRENT-ASSETS>                               339,882
<PP&E>                                       1,239,674
<DEPRECIATION>                                 636,351
<TOTAL-ASSETS>                               1,145,797
<CURRENT-LIABILITIES>                          114,732
<BONDS>                                        351,760
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           462
<OTHER-SE>                                     543,878
<TOTAL-LIABILITY-AND-EQUITY>                 1,145,797
<SALES>                                        662,070
<TOTAL-REVENUES>                               662,070
<CGS>                                          486,503
<TOTAL-COSTS>                                  539,312
<OTHER-EXPENSES>                                (5,733)
<LOSS-PROVISION>                                   503
<INTEREST-EXPENSE>                              11,380
<INCOME-PRETAX>                                116,608
<INCOME-TAX>                                    41,058
<INCOME-CONTINUING>                             75,550
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    75,550
<EPS-PRIMARY>                                     1.64
<EPS-DILUTED>                                     1.64