<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 SO 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-31-1997 JUN-30-1997 SEP-30-1997 <CASH> 964,175 884,414 782,882 <SECURITIES> 0 0 0 <RECEIVABLES> 441,986 301,161 315,313 <ALLOWANCES> 0 0 0 <INVENTORY> 0 0 0 <CURRENT-ASSETS> 1,406,161 1,185,575 1,098,195 <PP&E> 7,360,503 6,647,502 6,049,004 <DEPRECIATION> 5,152,352 4,653,251 4,345,348 <TOTAL-ASSETS> 3,614,312 3,179,826 2,801,851 <CURRENT-LIABILITIES> 0 0 0 <BONDS> 0 0 0 <PREFERRED-MANDATORY> 0 0 0 <PREFERRED> 0 0 0 <COMMON> 0 0 0 <OTHER-SE> 3,614,312 3,179,826 2,801,851 <TOTAL-LIABILITY-AND-EQUITY> 3,614,312 3,179,826 2,801,851 <SALES> 0 0 0 <TOTAL-REVENUES> 218,956 311,128 476,199 <CGS> 0 0 0 <TOTAL-COSTS> 101,346 114,762 125,942 <OTHER-EXPENSES> 0 0 0 <LOSS-PROVISION> 0 0 0 <INTEREST-EXPENSE> 0 0 0 <INCOME-PRETAX> 358,252 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> 358,252 579,929 788,539 <EPS-PRIMARY> 0 0 0 <EPS-DILUTED> 0 0 0