<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM THE BALANCE SHEETS AT
MARCH 31, 1997, JUNE 30, 1997 AND SEPTEMBER 30, 1997 (UNAUDITED) AND THE
STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1997, JUNE 30,
1997 AND SEPTEMBER 30, 1997 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS 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-31-1997 DEC-31-1997 DEC-31-1997
<PERIOD-START> JAN-01-1997 JAN-01-1997 JAN-01-1997
<PERIOD-END> MAR-31-1997 JUN-30-1997 SEP-30-1997
<CASH> 615,636 631,070 643,119
<SECURITIES> 0 0 0
<RECEIVABLES> 260,538 238,770 234,579
<ALLOWANCES> 0 0 0
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 876,174 869,840 877,698
<PP&E> 11,413,014 11,201,800 10,947,329
<DEPRECIATION> 5,328,924 5,382,529 5,408,540
<TOTAL-ASSETS> 6,960,264 6,689,111 6,416,487
<CURRENT-LIABILITIES> 0 0 0
<BONDS> 0 0 0
<PREFERRED-MANDATORY> 0 0 0
<PREFERRED> 0 0 0
<COMMON> 0 0 0
<OTHER-SE> 6,960,264 6,689,111 6,416,487
<TOTAL-LIABILITY-AND-EQUITY> 6,960,264 6,689,111 6,416,487
<SALES> 0 0 0
<TOTAL-REVENUES> 286,365 578,641 844,529
<CGS> 0 0 0
<TOTAL-COSTS> 172,841 346,595 515,294
<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> 158,600 295,670 426,043
<EPS-PRIMARY> 0 0 0
<EPS-DILUTED> 0 0 0