<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEETS AT MARCH 31, 1996, JUNE 30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND
THE STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1996, JUNE
30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF THIS 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-31-1996             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>                                       1,373,318               1,892,403               1,875,647
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                  976,537               1,095,416                 589,691
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                             2,349,855               2,987,819               2,465,338
<PP&E>                                      12,728,498              10,324,603               9,088,646
<DEPRECIATION>                               8,799,318               7,227,798               6,362,052
<TOTAL-ASSETS>                               6,279,035               6,084,624               5,191,932
<CURRENT-LIABILITIES>                                0                       0                       0
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                   6,279,035               6,084,624               5,191,932
<TOTAL-LIABILITY-AND-EQUITY>                 6,279,035               6,084,624               5,191,932
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                               603,025                 586,968                 847,385
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                  167,045                 312,840                 437,783
<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>                                   435,980               1,105,657               1,672,475
<EPS-PRIMARY>                                        0                       0                       0
<EPS-DILUTED>                                        0                       0                       0