WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   QTR-1
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-END>                               MAR-31-1995
<CASH>                                          106679
<SECURITIES>                                     36150
<RECEIVABLES>                                   483609
<ALLOWANCES>                                      7357
<INVENTORY>                                     398798
<CURRENT-ASSETS>                               1073906
<PP&E>                                         3906048
<DEPRECIATION>                                 2036534
<TOTAL-ASSETS>                                 3865600
<CURRENT-LIABILITIES>                           533639
<BONDS>                                              0
<COMMON>                                        577467
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                      957158
<TOTAL-LIABILITY-AND-EQUITY>                   3865600
<SALES>                                         791007
<TOTAL-REVENUES>                                791007
<CGS>                                           570086
<TOTAL-COSTS>                                   570086
<OTHER-EXPENSES>                                 36741
<LOSS-PROVISION>                                   574
<INTEREST-EXPENSE>                               18903
<INCOME-PRETAX>                                 140087
<INCOME-TAX>                                   (43377)
<INCOME-CONTINUING>                              65341
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     65712
<EPS-PRIMARY>                                     1.56
<EPS-DILUTED>                                     1.56
<FN>
<F1>
</FN>
        

</TABLE>
