<ARTICLE> 5
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<CASH>                                          93,404
<SECURITIES>                                       712
<RECEIVABLES>                                   27,769
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               121,885
<PP&E>                                       3,011,349
<DEPRECIATION>                                 869,420
<TOTAL-ASSETS>                               2,263,814
<CURRENT-LIABILITIES>                           19,862
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                   2,105,999
<TOTAL-LIABILITY-AND-EQUITY>                 2,263,814
<SALES>                                              0
<TOTAL-REVENUES>                               154,091
<CGS>                                                0
<TOTAL-COSTS>                                   79,708
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 74,383
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                             74,383
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    74,383
<EPS-PRIMARY>                                     0.45
<EPS-DILUTED>                                     0.45