<ARTICLE> 5 <PERIOD-TYPE> 12-MOS 3-MOS <FISCAL-YEAR-END> DEC-31-1997 DEC-31-1997 <PERIOD-END> DEC-31-1997 MAR-31-1997 <CASH> 52,300 28,900 <SECURITIES> 0 0 <RECEIVABLES> 60,400 76,800 <ALLOWANCES> 0 0 <INVENTORY> 38,300 43,700 <CURRENT-ASSETS> 19,700 17,900 <PP&E> 428,600 424,100 <DEPRECIATION> 226,400 221,800 <TOTAL-ASSETS> 477,900 476,500 <CURRENT-LIABILITIES> 58,000 69,700 <BONDS> 87,400 90,600 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 4,200 4,200 <OTHER-SE> 273,500 249,200 <TOTAL-LIABILITY-AND-EQUITY> 477,900 476,500 <SALES> 452,500 114,700 <TOTAL-REVENUES> 452,500 114,700 <CGS> 320,400 82,000 <TOTAL-COSTS> 320,400 82,000 <OTHER-EXPENSES> (1,100) (300) <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 5,600 1,400 <INCOME-PRETAX> 57,400 13,600 <INCOME-TAX> 13,300 5,200 <INCOME-CONTINUING> 44,400 8,400 <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> 44,400 8,400 <EPS-PRIMARY> 2.69 .51 <EPS-DILUTED> 2.68 .51