<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED, CONSOLIDATED CONDENSED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH UNAUDITED CONSOLIDATED CONDENSED FINANCIAL
STATEMENTS.
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                          89,395
<SECURITIES>                                         0
<RECEIVABLES>                                  132,969<F1>
<ALLOWANCES>                                   (1,340)<F1>
<INVENTORY>                                     47,455
<CURRENT-ASSETS>                               277,468
<PP&E>                                         416,543
<DEPRECIATION>                               (235,868)
<TOTAL-ASSETS>                                 489,028
<CURRENT-LIABILITIES>                           97,899
<BONDS>                                              0
                                0
                                          0
<COMMON>                                        12,958<F2>
<OTHER-SE>                                     358,304
<TOTAL-LIABILITY-AND-EQUITY>                   489,028
<SALES>                                        331,207
<TOTAL-REVENUES>                               331,207
<CGS>                                          259,865
<TOTAL-COSTS>                                  270,260
<OTHER-EXPENSES>                                 2,678
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             (3,580)
<INCOME-PRETAX>                                 61,849
<INCOME-TAX>                                    21,493
<INCOME-CONTINUING>                             40,356
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    40,356
<EPS-BASIC>                                     1.54
<EPS-DILUTED>                                     1.53
<FN>
<F1>Notes and accounts receivable - trade are reported net of allowances for
doubtful accounts in the Consolidated Condensed Balance Sheet.
<F2>Common stock and Additional Paid-in-Capital are combined in the Consolidated
Condensed Balance Sheet.
</FN>


</TABLE>



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