<ARTICLE> 5 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1997 <PERIOD-END> SEP-30-1997 <CASH> 2,588,650 <SECURITIES> 512,153 <RECEIVABLES> 821,657 <ALLOWANCES> 5,000 <INVENTORY> 0 <CURRENT-ASSETS> 3,917,460 <PP&E> 6,185,203 <DEPRECIATION> 6,018,512 <TOTAL-ASSETS> 4,084,151 <CURRENT-LIABILITIES> 222,407 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 3,861,744 <TOTAL-LIABILITY-AND-EQUITY> 4,084,151 <SALES> 0 <TOTAL-REVENUES> 1,274,934 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 657,408 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 3,388 <INCOME-PRETAX> 614,138 <INCOME-TAX> 0 <INCOME-CONTINUING> 614,138 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 614,138 <EPS-PRIMARY> 0 <EPS-DILUTED> 0