<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> JUN-30-1998 <CASH> 2,052,576 <SECURITIES> 0 <RECEIVABLES> 753,627 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 2,806,203 <PP&E> 6,907,836 <DEPRECIATION> 6,819,592 <TOTAL-ASSETS> 2,894,447 <CURRENT-LIABILITIES> 377,954 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 2,516,493 <TOTAL-LIABILITY-AND-EQUITY> 2,894,447 <SALES> 0 <TOTAL-REVENUES> 903,645 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 496,230 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 407,415 <INCOME-TAX> 0 <INCOME-CONTINUING> 407,415 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 407,415 <EPS-PRIMARY> 0 <EPS-DILUTED> 0