<ARTICLE> 5 <PERIOD-TYPE> 12-MOS <FISCAL-YEAR-END> DEC-31-1996 <PERIOD-START> JAN-01-1997 <PERIOD-END> DEC-31-1997 <CASH> 2,614,272 <SECURITIES> 256,076 <RECEIVABLES> 843,249 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 3,713,597 <PP&E> 5,905,410 <DEPRECIATION> 5,824,458 <TOTAL-ASSETS> 0 <CURRENT-LIABILITIES> 172,676 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 3,621,873 <TOTAL-LIABILITY-AND-EQUITY> 3,794,549 <SALES> 0 <TOTAL-REVENUES> 1,501,159 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 799,462 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 3,390 <INCOME-PRETAX> 698,307 <INCOME-TAX> 0 <INCOME-CONTINUING> 698,307 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 698,307 <EPS-PRIMARY> 0 <EPS-DILUTED> 0