<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