<TABLE> <S> <C>

<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 RESPECTIVE PERIODS THEN ENDED
</LEGEND>

<S>                             <C>                     <C>                     <C>
<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>                                         896,964                 859,457                 949,776
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                  527,711                 484,355                 466,547
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                             1,424,675               1,343,812               1,416,323
<PP&E>                                      16,481,361              16,365,883              16,014,882
<DEPRECIATION>                               7,066,754               7,249,431               7,312,924
<TOTAL-ASSETS>                              10,839,282              10,460,264              10,188,281
<CURRENT-LIABILITIES>                                0                       0                       0
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                  10,839,282              10,460,264             110,118,281
<TOTAL-LIABILITY-AND-EQUITY>                10,839,282              10,460,264             110,118,281
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                               452,207                 885,170               1,322,701
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                  250,729                 503,561                 742,795
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                   0                       0                       0
<INCOME-PRETAX>                                207,473                       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>                                   207,473                 373,192                 543,757
<EPS-PRIMARY>                                        0                       0                       0
<EPS-DILUTED>                                        0                       0                       0


</TABLE>