<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Financial Statements contained in Item 1 of Form 10-Q for the period ended March
31, 1998 and is qualified in its entirety by reference to such financial
statements. Figures are rounded to the nearest 100,000 (except EPS).
</LEGEND>

<PERIOD-TYPE>                              3-Mos
<FISCAL-YEAR-END>                          Dec-31-1998
<PERIOD-START>                             Jan-01-1998
<PERIOD-END>                               Mar-31-1998
<CASH>                                        53,500 
<SECURITIES>                                  21,000 
<RECEIVABLES>                                388,400 
<ALLOWANCES>                                       0 
<INVENTORY>                                  361,300 
<CURRENT-ASSETS>                             867,500 
<PP&E>                                     2,338,600 
<DEPRECIATION>                           (1,553,500) 
<TOTAL-ASSETS>                             1,873,000 
<CURRENT-LIABILITIES>                        462,100 
<BONDS>                                      268,000 
<PREFERRED-MANDATORY>                              0
<PREFERRED>                                        0 
<COMMON>                                      48,100   
<OTHER-SE>                                   816,500 
<TOTAL-LIABILITY-AND-EQUITY>               1,873,000 
<SALES>                                      573,100 
<TOTAL-REVENUES>                             573,100 
<CGS>                                        431,900 
<TOTAL-COSTS>                                431,900 
<OTHER-EXPENSES>                                   0 
<LOSS-PROVISION>                                   0 
<INTEREST-EXPENSE>                             5,000 
<INCOME-PRETAX>                               59,600 
<INCOME-TAX>                                  20,500 
<INCOME-CONTINUING>                           39,100 
<DISCONTINUED>                                     0 
<EXTRAORDINARY>                                    0 
<CHANGES>                                          0 
<NET-INCOME>                                  39,100 
<EPS-PRIMARY>                                   0.81 
<EPS-DILUTED>                                   0.80