WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE. <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1994 <PERIOD-END> DEC-31-1994 <CASH> 4,245 <SECURITIES> 72,200 <RECEIVABLES> 33,161 <ALLOWANCES> 694 <INVENTORY> 24,889 <CURRENT-ASSETS> 144,343 <PP&E> 202,988 <DEPRECIATION> 142,550 <TOTAL-ASSETS> 238,694 <CURRENT-LIABILITIES> 36,014 <BONDS> 9,047 <COMMON> 10,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 148,769 <TOTAL-LIABILITY-AND-EQUITY> 238,694 <SALES> 155,001 <TOTAL-REVENUES> 166,189 <CGS> 104,567 <TOTAL-COSTS> 137,031 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 32 <INTEREST-EXPENSE> 401 <INCOME-PRETAX> 28,757 <INCOME-TAX> 9,210 <INCOME-CONTINUING> 19,547 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> (244) <NET-INCOME> 19,303 <EPS-PRIMARY> 3.81 <EPS-DILUTED> 0