<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 1,704,963 <SECURITIES> 0 <RECEIVABLES> 69,385 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 1,774,348 <PP&E> 4,932,918 <DEPRECIATION> 3,488,975 <TOTAL-ASSETS> 3,218,291 <CURRENT-LIABILITIES> 117,838 <BONDS> 495,758 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 2,604,695 <TOTAL-LIABILITY-AND-EQUITY> 3,218,291 <SALES> 0 <TOTAL-REVENUES> 373,031 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 289,994 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 29,210 <INCOME-PRETAX> 53,827 <INCOME-TAX> 0 <INCOME-CONTINUING> 53,827 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 53,827 <EPS-PRIMARY> 0 <EPS-DILUTED> 0