<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> JUN-30-1997 <CASH> 83,624 <SECURITIES> 0 <RECEIVABLES> 34,127 <ALLOWANCES> 27,921 <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 1,273,278 <DEPRECIATION> 1,150,964 <TOTAL-ASSETS> 213,749 <CURRENT-LIABILITIES> 0 <BONDS> 0 <COMMON> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 205,190 <TOTAL-LIABILITY-AND-EQUITY> 213,749 <SALES> 0 <TOTAL-REVENUES> 81,394 <CGS> 0 <TOTAL-COSTS> 76,130 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 76,130 <INCOME-TAX> 0 <INCOME-CONTINUING> 76,130 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 76,130 <EPS-PRIMARY> 0 <EPS-DILUTED> 0