<ARTICLE>5

                                                             
<PERIOD-TYPE>                                                   6-MOS
<FISCAL-YEAR-END>                                               DEC-31-2000
<PERIOD-END>                                                    JUN-30-2000
<CASH>                                                             18861820
<SECURITIES>                                                              0
<RECEIVABLES>                                                        943734
<ALLOWANCES>                                                              0
<INVENTORY>                                                               0
<CURRENT-ASSETS>                                                          0
<PP&E>                                                            115363309
<DEPRECIATION>                                                     85860286
<TOTAL-ASSETS>                                                     49310362
<CURRENT-LIABILITIES>                                                     0
<BONDS>                                                                   0
<PREFERRED-MANDATORY>                                                     0
<PREFERRED>                                                               0
<COMMON>                                                                  0
<OTHER-SE>                                                         40336535
<TOTAL-LIABILITY-AND-EQUITY>                                       49310362
<SALES>                                                                   0
<TOTAL-REVENUES>                                                    6834083
<CGS>                                                                     0
<TOTAL-COSTS>                                                             0
<OTHER-EXPENSES>                                                    3176965
<LOSS-PROVISION>                                                          0
<INTEREST-EXPENSE>                                                        0
<INCOME-PRETAX>                                                     3657118
<INCOME-TAX>                                                              0
<INCOME-CONTINUING>                                                 3657118
<DISCONTINUED>                                                            0
<EXTRAORDINARY>                                                           0
<CHANGES>                                                                 0
<NET-INCOME>                                                        3657118
<EPS-BASIC>                                                            6.47
<EPS-DILUTED>                                                             0