<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> MAR-31-1998 <CASH> 178,455 <SECURITIES> 0 <RECEIVABLES> 23,295 <ALLOWANCES> 2,323 <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 1,068,297 <DEPRECIATION> 1,027,916 <TOTAL-ASSETS> 240,182 <CURRENT-LIABILITIES> 0 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 233,381 <TOTAL-LIABILITY-AND-EQUITY> 240,182 <SALES> 0 <TOTAL-REVENUES> 90,925 <CGS> 0 <TOTAL-COSTS> 0 <OTHER-EXPENSES> 37,070 <LOSS-PROVISION> (6,070) <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 59,925 <INCOME-TAX> 0 <INCOME-CONTINUING> 59,925 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 59,925 <EPS-PRIMARY> 3.51 <EPS-DILUTED> 3.51