<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> JUN-30-1997 <CASH> 106,429 <SECURITIES> 1,000 <RECEIVABLES> 38,012 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 145,441 <PP&E> 3,943,835 <DEPRECIATION> 1,472,797 <TOTAL-ASSETS> 2,616,479 <CURRENT-LIABILITIES> 7,459 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 2,609,020 <TOTAL-LIABILITY-AND-EQUITY> 2,616,479 <SALES> 0 <TOTAL-REVENUES> 218,487 <CGS> 0 <TOTAL-COSTS> 103,455 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 115,032 <INCOME-TAX> 0 <INCOME-CONTINUING> 115,032 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 115,032 <EPS-PRIMARY> 4.22 <EPS-DILUTED> 4.22