<ARTICLE> 5 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JUL-1-1997 <PERIOD-END> SEP-30-1997 <CASH> 15,504 <SECURITIES> 10,831 <RECEIVABLES> 41,159 <ALLOWANCES> 6,831 <INVENTORY> 15,110 <CURRENT-ASSETS> 83,765 <PP&E> 205,235 <DEPRECIATION> 149,620 <TOTAL-ASSETS> 176,084 <CURRENT-LIABILITIES> 36,910 <BONDS> 2,260 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1,484 <OTHER-SE> 131,732 <TOTAL-LIABILITY-AND-EQUITY> 176,084 <SALES> 0 <TOTAL-REVENUES> 183,092 <CGS> 64,574 <TOTAL-COSTS> 151,559 <OTHER-EXPENSES> 9,408 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 23,860 <INCOME-TAX> 8,232 <INCOME-CONTINUING> 15,628 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 15,628 <EPS-PRIMARY> 1.06 <EPS-DILUTED> 1.06