<ARTICLE> 5 <MULTIPLIER> 1000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> SEP-30-1999 <CASH> 9,904 <SECURITIES> 24,744 <RECEIVABLES> 66,864 <ALLOWANCES> 2,235 <INVENTORY> 65,773 <CURRENT-ASSETS> 176,117 <PP&E> 270,289 <DEPRECIATION> 166,752 <TOTAL-ASSETS> 383,215 <CURRENT-LIABILITIES> 71,510 <BONDS> 20,076 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 15,000 <OTHER-SE> 238,003 <TOTAL-LIABILITY-AND-EQUITY> 383,215 <SALES> 209,554 <TOTAL-REVENUES> 218,201 <CGS> 135,917 <TOTAL-COSTS> 168,164 <OTHER-EXPENSES> 59 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 996 <INCOME-PRETAX> 48,982 <INCOME-TAX> 18,736 <INCOME-CONTINUING> 30,246 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 30,246 <EPS-BASIC> 2.98 <EPS-DILUTED> 2.95