<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Financial Statements contained in Item 1 on Form 10-Q for the period ended June
30, 1999 and is qualified in its entirety by reference to such financial
statements. Figures are rounded to the nearest 100,000 (except EPS).
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               JUN-30-1999
<CASH>                                           5,100
<SECURITIES>                                         0
<RECEIVABLES>                                  232,400
<ALLOWANCES>                                         0
<INVENTORY>                                    119,300
<CURRENT-ASSETS>                               387,700
<PP&E>                                         851,300
<DEPRECIATION>                                 534,400
<TOTAL-ASSETS>                                 776,800
<CURRENT-LIABILITIES>                          201,000
<BONDS>                                         81,700
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        23,000
<OTHER-SE>                                     423,000
<TOTAL-LIABILITY-AND-EQUITY>                   776,800
<SALES>                                        493,200
<TOTAL-REVENUES>                               493,200
<CGS>                                          348,100
<TOTAL-COSTS>                                  348,100
<OTHER-EXPENSES>                                92,700
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,600
<INCOME-PRETAX>                                 52,900
<INCOME-TAX>                                    18,500
<INCOME-CONTINUING>                             34,400
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    34,400
<EPS-BASIC>                                       1.49
<EPS-DILUTED>                                     1.49