<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 2,642,334 <SECURITIES> 0 <RECEIVABLES> 88,376 <ALLOWANCES> 5,000 <INVENTORY> 0 <CURRENT-ASSETS> 2,725,710 <PP&E> 6,309,081 <DEPRECIATION> 6,055,626 <TOTAL-ASSETS> 4,262,768 <CURRENT-LIABILITIES> 217,411 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 4,045,357 <TOTAL-LIABILITY-AND-EQUITY> 4,262,768 <SALES> 0 <TOTAL-REVENUES> 1,085,124 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 465,650 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 3,388 <INCOME-PRETAX> 616,086 <INCOME-TAX> 0 <INCOME-CONTINUING> 616,086 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 616,086 <EPS-PRIMARY> 0 <EPS-DILUTED> 0