<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 3,296,738 <SECURITIES> 0 <RECEIVABLES> 143,084 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 3,439,822 <PP&E> 4,975,522 <DEPRECIATION> (4,936,168) <TOTAL-ASSETS> 3,479,176 <CURRENT-LIABILITIES> 363,160 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 3,116,016 <TOTAL-LIABILITY-AND-EQUITY> 3,479,176 <SALES> 0 <TOTAL-REVENUES> 763,584 <CGS> 0 <TOTAL-COSTS> 161,111 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 602,473 <INCOME-TAX> 0 <INCOME-CONTINUING> 602,473 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 602,473 <EPS-BASIC> 0 <EPS-DILUTED> 0