<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 STATEMENTS 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 ITS
QUARTERLY REPORTS ON FORM 10-Q FOR THE PERIOD MARCH 31, 1996, JUNE 30, 1996 AND
SEPTEMBER 30, 1996.
</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> 688,321 937,943 762,501
<SECURITIES> 0 0 0
<RECEIVABLES> 496,480 405,294 325,951
<ALLOWANCES> 0 0 0
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 1,184,801 1,343,237 1,088,452
<PP&E> 5,734,378 4,539,029 3,747,258
<DEPRECIATION> 4,001,814 3,154,629 2,604,347
<TOTAL-ASSETS> 2,917,365 2,727,637 2,231,363
<CURRENT-LIABILITIES> 0 0 0
<BONDS> 0 0 0
<PREFERRED-MANDATORY> 0 0 0
<PREFERRED> 0 0 0
<COMMON> 0 0 0
<OTHER-SE> 2,917,365 2,727,637 2,231,363
<TOTAL-LIABILITY-AND-EQUITY> 2,917,365 2,727,637 2,231,363
<SALES> 0 0 0
<TOTAL-REVENUES> 206,817 365,530 522,541
<CGS> 0 0 0
<TOTAL-COSTS> 9,493 18,436 27,911
<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> 277,655 57,598 805,208
<EPS-PRIMARY> 0 0 0
<EPS-DILUTED> 0 0 0