<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1995 <PERIOD-START> JAN-01-1995 <PERIOD-END> MAR-31-1995 <CASH> 27,279 <SECURITIES> 46,775 <RECEIVABLES> 151,315 <ALLOWANCES> 0 <INVENTORY> 90,041 <CURRENT-ASSETS> 426,627 <PP&E> 895,163 <DEPRECIATION> 419,010 <TOTAL-ASSETS> 1,317,509 <CURRENT-LIABILITIES> 344,182 <BONDS> 114,857 <COMMON> 82,317 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 735,554 <TOTAL-LIABILITY-AND-EQUITY> 1,317,509 <SALES> 465,628 <TOTAL-REVENUES> 465,628 <CGS> 210,670 <TOTAL-COSTS> 410,714 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 3,111 <INCOME-PRETAX> 58,343 <INCOME-TAX> 24,504 <INCOME-CONTINUING> 0 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 33,839 <EPS-PRIMARY> .41 <EPS-DILUTED> .41