<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL 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 PERIOD MARCH 31, 1997, JUNE 30, 1997 AND SEPTEMBER 30,
1997 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> 296,318 309,254 330,966
<SECURITIES> 0 0 0
<RECEIVABLES> 110,688 115,388 106,561
<ALLOWANCES> 0 0 0
<INVENTORY> 0 0 0
<CURRENT-ASSETS> 407,006 424,642 437,527
<PP&E> 4,620,803 4,491,820 4,361,934
<DEPRECIATION> 2,455,486 2,447,461 2,435,439
<TOTAL-ASSETS> 2,572,323 2,469,001 2,364,022
<CURRENT-LIABILITIES> 0 0 0
<BONDS> 0 0 0
<PREFERRED-MANDATORY> 0 0 0
<PREFERRED> 0 0 0
<COMMON> 0 0 0
<OTHER-SE> 2,572,323 2,469,001 2,364,022
<TOTAL-LIABILITY-AND-EQUITY> 2,572,323 2,469,001 2,364,022
<SALES> 0 0 0
<TOTAL-REVENUES> 121,330 234,230 355,780
<CGS> 0 0 0
<TOTAL-COSTS> 71,299 142,697 211,619
<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> 63,025 127,876 207,241
<EPS-PRIMARY> 0 0 0
<EPS-DILUTED> 0 0 0