<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF OPERATIONS ON FORM 10-QSB AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FORM 10-QSB. </LEGEND> <MULTIPLIER> 1 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <EXCHANGE-RATE> 1 <CASH> 156,291 <SECURITIES> 0 <RECEIVABLES> 3,618,756 <ALLOWANCES> 98,000 <INVENTORY> 1,727,684 <CURRENT-ASSETS> 5,710,131 <PP&E> 23,179,456 <DEPRECIATION> 18,792,473 <TOTAL-ASSETS> 10,475,699 <CURRENT-LIABILITIES> 2,261,753 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 35,938 <OTHER-SE> 8,178,008 <TOTAL-LIABILITY-AND-EQUITY> 10,475,699 <SALES> 0 <TOTAL-REVENUES> 10,883,547 <CGS> 0 <TOTAL-COSTS> 7,137,410 <OTHER-EXPENSES> 2,797,812 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 3,646 <INCOME-PRETAX> 951,971 <INCOME-TAX> 100,000 <INCOME-CONTINUING> 0 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 851,971 <EPS-PRIMARY> .27 <EPS-DILUTED> 0