<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEETS AT MARCH 31, 1997, JUNE 30, 1997 AND SEPTEMBER 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> 402,601 373,276 319,530
<SECURITIES> 0 0 0
<RECEIVABLES> 173,817 123,840 116,328
<ALLOWANCES> 0 0 0
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 576,418 497,116 435,858
<PP&E> 2,772,703 2,494,193 2,274,071
<DEPRECIATION> 1,923,401 1,745,935 1,617,014
<TOTAL-ASSETS> 1,425,720 1,245,374 1,092,915
<CURRENT-LIABILITIES> 0 0 0
<BONDS> 0 0 0
<PREFERRED-MANDATORY> 0 0 0
<PREFERRED> 0 0 0
<COMMON> 0 0 0
<OTHER-SE> 1,425,720 1,245,374 1,092,915
<TOTAL-LIABILITY-AND-EQUITY> 1,425,720 1,245,374 1,092,915
<SALES> 0 0 0
<TOTAL-REVENUES> 92,676 164,770 240,851
<CGS> 0 0 0
<TOTAL-COSTS> 45,408 88,594 96,925
<OTHER-EXPENSES> 0 0 0
<LOSS-PROVISION> 0 0 0
<INTEREST-EXPENSE> 0 0 0
<INCOME-PRETAX> 102,757 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> 102,757 186,869 281,237
<EPS-PRIMARY> 0 0 0
<EPS-DILUTED> 0 0 0