<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET 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.
</LEGEND>

<S>                             <C>                     <C>                     <C>
<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>                                       1,800,236               1,643,443               1,599,296
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                  974,764                 908,599                 811,339
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                             2,775,000               2,552,042               2,410,635
<PP&E>                                      35,937,914              35,909,301              35,954,273
<DEPRECIATION>                               9,654,928              10,157,348              10,661,804
<TOTAL-ASSETS>                              29,189,095              28,399,942              27,763,889
<CURRENT-LIABILITIES>                           75,000                  75,000                  75,000
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                  29,114,095              28,324,942              27,688,889
<TOTAL-LIABILITY-AND-EQUITY>                29,189,095              28,399,942              27,763,889
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                             1,061,220               2,023,197               2,956,602
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                  576,702               1,152,877               1,730,870
<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>                                   518,666                 922,383               1,321,319
<EPS-PRIMARY>                                        0                       0                       0
<EPS-DILUTED>                                        0                       0                       0


</TABLE>