<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1994 <PERIOD-END> SEP-30-1994 <CASH> 223,491 <SECURITIES> 178,155 <RECEIVABLES> 161,694 <ALLOWANCES> 3,362 <INVENTORY> 98,352 <CURRENT-ASSETS> 696,126 <PP&E> 897,507 <DEPRECIATION> 446,187 <TOTAL-ASSETS> 1,206,575 <CURRENT-LIABILITIES> 284,462 <BONDS> 143,750 <COMMON> 569 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 495,518 <TOTAL-LIABILITY-AND-EQUITY> 1,206,575 <SALES> 646,137 <TOTAL-REVENUES> 646,137 <CGS> 376,943 <TOTAL-COSTS> 376,943 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 14,275 <INCOME-PRETAX> 103,459 <INCOME-TAX> 28,966 <INCOME-CONTINUING> 72,261 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 72,261 <EPS-PRIMARY> 1.35 <EPS-DILUTED> 1.26