<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AT MARCH 31, 1996 AND THE CONSOLIDATED STATEMENT OF
INCOME FOR THE QUARTER ENDED MARCH 31, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          JUN-30-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                       2,044,126
<SECURITIES>                                27,721,162
<RECEIVABLES>                                2,060,199
<ALLOWANCES>                                   118,857
<INVENTORY>                                    478,057
<CURRENT-ASSETS>                            10,463,577
<PP&E>                                      31,257,890
<DEPRECIATION>                              20,471,738
<TOTAL-ASSETS>                              52,773,245
<CURRENT-LIABILITIES>                        4,596,661
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                     3,921,287
<OTHER-SE>                                  42,315,297
<TOTAL-LIABILITY-AND-EQUITY>                52,773,245
<SALES>                                      5,913,408
<TOTAL-REVENUES>                             7,050,020
<CGS>                                        3,383,687
<TOTAL-COSTS>                                5,818,119
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                              1,553,963
<INCOME-TAX>                                   610,000
<INCOME-CONTINUING>                            943,963
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   943,963
<EPS-PRIMARY>                                     0.76
<EPS-DILUTED>                                     0.76