<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
unaudited, consolidated financial statements and is qualified in its entirety by
reference to such unaudited consolidated financial statements.
</LEGEND>
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               MAR-31-1998
<CASH>                                          88,210
<SECURITIES>                                         0
<RECEIVABLES>                                   77,588 <F1>
<ALLOWANCES>                                         0 <F1>
<INVENTORY>                                     50,977
<CURRENT-ASSETS>                               223,546
<PP&E>                                         337,604
<DEPRECIATION>                               (189,808)
<TOTAL-ASSETS>                                 407,185
<CURRENT-LIABILITIES>                           82,288
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        21,129 <F2>
<OTHER-SE>                                     274,750
<TOTAL-LIABILITY-AND-EQUITY>                   407,185
<SALES>                                        136,371
<TOTAL-REVENUES>                               136,371
<CGS>                                          111,534
<TOTAL-COSTS>                                  116,917
<OTHER-EXPENSES>                                   590
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               (890)
<INCOME-PRETAX>                                 19,754
<INCOME-TAX>                                     6,963
<INCOME-CONTINUING>                             12,791
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    12,791
<EPS-PRIMARY>                                     0.46
<EPS-DILUTED>                                     0.46
<FN>
<F1> NOTES AND ACCOUNTS RECEIVABLE - TRADE ARE REPORTED
     NET OF ALLOWANCES FOR DOUBTFUL ACCOUNTS IN THE
     CONSOLIDATED BALANCE SHEET.
<F2> COMMON STOCK AND ADDITIONAL PAID-IN-CAPITAL ARE 
     COMBINED IN THE CONSOLIDATED CONDENSED BALANCE
     SHEET.
</FN>