<ARTICLE> 5 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1997 <PERIOD-END> DEC-31-1997 <CASH> 2,806,479 <SECURITIES> 295,046 <RECEIVABLES> 1,058,649 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 4,160,174 <PP&E> 19,462,613 <DEPRECIATION> 17,907,433 <TOTAL-ASSETS> 0 <CURRENT-LIABILITIES> 305,740 <BONDS> 24,608 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 5,385,006 <TOTAL-LIABILITY-AND-EQUITY> 5,715,354 <SALES> 0 <TOTAL-REVENUES> 2,895,783 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 2,153,315 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 24,825 <INCOME-PRETAX> 717,643 <INCOME-TAX> 0 <INCOME-CONTINUING> 717,643 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 717,643 <EPS-PRIMARY> 0 <EPS-DILUTED> 0