<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>
       
                                                                       
<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-30-1997             JUN-30-1997             SEP-30-1997
<CASH>                                       1,403,584               1,584,210               1,254,994
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                  558,803                 471,338                 472,943
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                             1,962,387               2,055,548               1,727,937
<PP&E>                                      13,023,641              11,336,424              10,411,132
<DEPRECIATION>                               8,253,040               7,294,869               6,814,848
<TOTAL-ASSETS>                               6,732,988               6,097,103               5,324,221
<CURRENT-LIABILITIES>                                0                       0                       0
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                   6,732,988               6,097,103               5,324,221
<TOTAL-LIABILITY-AND-EQUITY>                 6,732,988               6,097,103               5,324,221
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                               333,453                 662,644               1,015,665
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                  196,826                 374,168                 517,705
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                   0                       0                       0
<INCOME-PRETAX>                                279,061                       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>                                   279,061                 577,149                 919,010
<EPS-PRIMARY>                                        0                       0                       0
<EPS-DILUTED>                                        0                       0                       0