<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> JUN-30-1997 <CASH> 1,191 <SECURITIES> 0 <RECEIVABLES> 156,657 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 157,848 <PP&E> 8,901,796 <DEPRECIATION> 8,066,003 <TOTAL-ASSETS> 8,193,641 <CURRENT-LIABILITIES> 14,327 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 0 <TOTAL-LIABILITY-AND-EQUITY> 8,193,641 <SALES> 596,312 <TOTAL-REVENUES> 598,726 <CGS> 126,746 <TOTAL-COSTS> 484,462 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 114,264 <INCOME-TAX> 0 <INCOME-CONTINUING> 114,264 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 114,264 <EPS-PRIMARY> 0 <EPS-DILUTED> 0