<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE SHEETS AT MARCH 31, 1996, JUNE 30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1996, JUNE 30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF THIS QUARTERLY REPORT ON FORM 10-Q FOR THE RESPECTIVE PERIODS THEN ENDED </LEGEND> <PERIOD-TYPE> 3-MOS 6-MOS 9-MOS <FISCAL-YEAR-END> DEC-31-1996 DEC-31-1996 DEC-31-1996 <PERIOD-START> JAN-01-1996 JAN-01-1996 JAN-01-1996 <PERIOD-END> MAR-31-1996 JUN-30-1996 SEP-30-1996 <CASH> 1,373,318 1,892,403 1,875,647 <SECURITIES> 0 0 0 <RECEIVABLES> 976,537 1,095,416 589,691 <ALLOWANCES> 0 0 0 <INVENTORY> 0 0 0 <CURRENT-ASSETS> 2,349,855 2,987,819 2,465,338 <PP&E> 12,728,498 10,324,603 9,088,646 <DEPRECIATION> 8,799,318 7,227,798 6,362,052 <TOTAL-ASSETS> 6,279,035 6,084,624 5,191,932 <CURRENT-LIABILITIES> 0 0 0 <BONDS> 0 0 0 <PREFERRED-MANDATORY> 0 0 0 <PREFERRED> 0 0 0 <COMMON> 0 0 0 <OTHER-SE> 6,279,035 6,084,624 5,191,932 <TOTAL-LIABILITY-AND-EQUITY> 6,279,035 6,084,624 5,191,932 <SALES> 0 0 0 <TOTAL-REVENUES> 603,025 586,968 847,385 <CGS> 0 0 0 <TOTAL-COSTS> 167,045 312,840 437,783 <OTHER-EXPENSES> 0 0 0 <LOSS-PROVISION> 0 0 0 <INTEREST-EXPENSE> 0 0 0 <INCOME-PRETAX> 0 0 0 <INCOME-TAX> 0 0 0 <INCOME-CONTINUING> 0 0 0 <DISCONTINUED> 0 0 0 <EXTRAORDINARY> 0 0 0 <CHANGES> 0 0 0 <NET-INCOME> 435,980 1,105,657 1,672,475 <EPS-PRIMARY> 0 0 0 <EPS-DILUTED> 0 0 0