<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 115,282 <SECURITIES> 600 <RECEIVABLES> 43,986 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 159,868 <PP&E> 4,001,642 <DEPRECIATION> 1,650,429 <TOTAL-ASSETS> 2,511,081 <CURRENT-LIABILITIES> 12,505 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 2,498,576 <TOTAL-LIABILITY-AND-EQUITY> 2,511,081 <SALES> 0 <TOTAL-REVENUES> 235,327 <CGS> 0 <TOTAL-COSTS> 51,453 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 183,874 <INCOME-TAX> 0 <INCOME-CONTINUING> 183,874 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 183,874 <EPS-PRIMARY> 20.80 <EPS-DILUTED> 20.80