<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM THE CONSOLIDATED
BALANCE SHEET AND THE CONSOLIDATED STATEMENT OF INCOME FILED AS PART OF THE
ANNUAL REPORT ON FORM 10-K AND IS QUALIFIED IN ITS ENTIRETY BY SUCH ANNUAL
REPORT ON FORM 10-K.
</LEGEND>
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                         $21,180
<SECURITIES>                                        $0
<RECEIVABLES>                                 $147,989
<ALLOWANCES>                                    $2,782
<INVENTORY>                                   $127,206
<CURRENT-ASSETS>                              $311,530
<PP&E>                                      $1,259,340
<DEPRECIATION>                                $744,672
<TOTAL-ASSETS>                                $937,797
<CURRENT-LIABILITIES>                         $107,936
<BONDS>                                             $0
<PREFERRED-MANDATORY>                               $0
<PREFERRED>                                         $0
<COMMON>                                          $470
<OTHER-SE>                                    $451,197
<TOTAL-LIABILITY-AND-EQUITY>                  $937,797
<SALES>                                       $820,862
<TOTAL-REVENUES>                              $820,862
<CGS>                                         $560,057
<TOTAL-COSTS>                                 $695,147
<OTHER-EXPENSES>                                    $0
<LOSS-PROVISION>                                    $0
<INTEREST-EXPENSE>                              $4,487
<INCOME-PRETAX>                               $122,798
<INCOME-TAX>                                   $38,066
<INCOME-CONTINUING>                            $84,732
<DISCONTINUED>                                      $0
<EXTRAORDINARY>                                     $0
<CHANGES>                                           $0
<NET-INCOME>                                   $84,732
<EPS-PRIMARY>                                    $1.64
<EPS-DILUTED>                                    $1.63