<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM (A) THE
CONSOLIDATED BALANCE SHEET AT JUNE 30, 1996 AND THE CONSOLIDATED STATEMENT OF
INCOME FOR THE YEAR ENDED JUNE 30, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH (B) FINANCIAL STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JUN-30-1996
<PERIOD-START>                             JUL-01-1995
<PERIOD-END>                               JUN-30-1996
<CASH>                                         1721939
<SECURITIES>                                  30280869
<RECEIVABLES>                                  5322625
<ALLOWANCES>                                    149180
<INVENTORY>                                     531637
<CURRENT-ASSETS>                              12932037
<PP&E>                                        31904180
<DEPRECIATION>                                20867899
<TOTAL-ASSETS>                                55534495
<CURRENT-LIABILITIES>                          4646457
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       3921287
<OTHER-SE>                                    44216751
<TOTAL-LIABILITY-AND-EQUITY>                  55534495
<SALES>                                       25755479
<TOTAL-REVENUES>                              30223457
<CGS>                                         14854410
<TOTAL-COSTS>                                 24703105
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                6332548
<INCOME-TAX>                                   2360000
<INCOME-CONTINUING>                            3972548
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   3972548
<EPS-PRIMARY>                                     3.23
<EPS-DILUTED>                                     3.23