<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE CONSOLIDATED BALANCE SHEET AT MARCH 31, 1998 AND THE CONSOLIDATED STATEMENT OF INCOME FOR THE NINE MONTHS ENDED MARCH 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> JUN-30-1998 <PERIOD-START> JUL-01-1997 <PERIOD-END> MAR-31-1998 <CASH> 4,484,798 <SECURITIES> 32,806,319 <RECEIVABLES> 3,034,605 <ALLOWANCES> 176,769 <INVENTORY> 467,127 <CURRENT-ASSETS> 41,503,498 <PP&E> 33,498,496 <DEPRECIATION> 23,065,230 <TOTAL-ASSETS> 85,806,504 <CURRENT-LIABILITIES> 6,177,523 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 4,138,462 <OTHER-SE> 69,240,519 <TOTAL-LIABILITY-AND-EQUITY> 85,806,504 <SALES> 15,775,574 <TOTAL-REVENUES> 19,205,177 <CGS> 11,098,539 <TOTAL-COSTS> 18,377,027 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 14,633,647 <INCOME-TAX> 5,665,000 <INCOME-CONTINUING> 8,968,647 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 8,968,647 <EPS-PRIMARY> 7.84<F1> <EPS-DILUTED> 7.78 <FN> <F1>The term "Primary" should read as "Basic". </FN>