EXHIBIT 12



                             COMPUTATION OF RATIO OF
                            EARNINGS TO FIXED CHARGES
                                    UNAUDITED

                                                          Fiscal Year Ended September 30
                                                   ---------------------------------------------

                                                     1998     1997     1996     1995      1994
                                                   ---------------------------------------------
                                                                         

EARNINGS:

Income Before Interest Charges and Minority 
  Interest in Foreign Subsidiaries (2)             $118,085 $169,783 $159,599 $128,061  $127,885
Allowance for Borrowed Funds Used in Construction       110      346      205      195       209
Federal Income Tax                                   43,626   57,807   55,148   30,522    36,630
State Income Tax                                      6,635    7,067    7,266    4,905     6,309
Deferred Inc. Taxes - Net (3)                       (26,237)   3,800    3,907    8,452     4,853
Investment Tax Credit - Net                            (663)    (665)    (665)    (672)     (682)
Rentals (1)                                           4,672    5,328    5,640    5,422     5,730
                                                   ---------------------------------------------

                                                   $146,228 $243,466 $231,100 $176,885  $180,934
                                                   =============================================

FIXED CHARGES:

Interest & Amortization of Premium and
   Discount of Funded Debt                          $53,154  $42,131  $40,872  $40,896   $36,699
Interest on Commercial Paper and
   Short-Term Notes Payable                          13,605    8,808    7,872    6,745     5,599
Other Interest (2)                                   16,919    4,502    6,389    4,721     3,361
Rentals (1)                                           4,672    5,328    5,640    5,422     5,730
                                                   ---------------------------------------------

                                                    $88,350  $60,769  $60,773  $57,784   $51,389
                                                   =============================================

RATIO OF EARNINGS TO FIXED CHARGES                     1.66     4.01     3.80     3.06      3.52



Notes:
   (1)  Rentals  shown above  represent  the portion of all rentals  (other than
        delay rentals) deemed representative of the interest factor.

   (2)  The twelve months ended September 30, 1998 and, fiscal 1997,  1996, 1995
        and 1994 reflect the reclassification of $1,716,  $1,716, $1,716, $1,716
        and $1,674,  representing  the loss on reacquired debt amortized  during
        each period, from Other Interest Charges to Operation Expense.

   (3)  Deferred  Income  Taxes - Net for  fiscal  1998  and  1994  exclude  the
        cumulative effect of changes in accounting.