<ARTICLE> 5 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-END> DEC-31-1996 <CASH> 269,628 <SECURITIES> 0 <RECEIVABLES> 132,187 <ALLOWANCES> 5,082 <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 3,550,990 <DEPRECIATION> (3,427,418) <TOTAL-ASSETS> 523,019 <CURRENT-LIABILITIES> 0 <BONDS> 0 <COMMON> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 485,542 <TOTAL-LIABILITY-AND-EQUITY> 523,019 <SALES> 0 <TOTAL-REVENUES> 487,226 <CGS> 0 <TOTAL-COSTS> 514,251 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 238,083 <INCOME-TAX> 0 <INCOME-CONTINUING> 238,083 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 238,083 <EPS-PRIMARY> 0 <EPS-DILUTED> 0