<ARTICLE> 5 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> SEP-30-1999 <CASH> 305,897 <SECURITIES> 1,044 <RECEIVABLES> 61,279 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 368,220 <PP&E> 8,883,847 <DEPRECIATION> 7,764,186 <TOTAL-ASSETS> 6,487,881 <CURRENT-LIABILITIES> 26,401 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 5,883,970 <TOTAL-LIABILITY-AND-EQUITY> 6,487,881 <SALES> 0 <TOTAL-REVENUES> 550,910 <CGS> 0 <TOTAL-COSTS> 129,654 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 421,256 <INCOME-TAX> 0 <INCOME-CONTINUING> 421,256 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 421,256 <EPS-BASIC> 8.81 <EPS-DILUTED> 8.81