<ARTICLE>5

                                                  
<PERIOD-TYPE>                                        3-MOS
<FISCAL-YEAR-END>                                    DEC-31-2000
<PERIOD-END>                                         MAR-31-2000
<CASH>                                                  18749861
<SECURITIES>                                                   0
<RECEIVABLES>                                             935004
<ALLOWANCES>                                                   0
<INVENTORY>                                                    0
<CURRENT-ASSETS>                                               0
<PP&E>                                                 115363309
<DEPRECIATION>                                          84595272
<TOTAL-ASSETS>                                          50455218
<CURRENT-LIABILITIES>                                          0
<BONDS>                                                        0
<PREFERRED-MANDATORY>                                          0
<PREFERRED>                                                    0
<COMMON>                                                       0
<OTHER-SE>                                              40580031
<TOTAL-LIABILITY-AND-EQUITY>                            50455218
<SALES>                                                        0
<TOTAL-REVENUES>                                         3405545
<CGS>                                                          0
<TOTAL-COSTS>                                                  0
<OTHER-EXPENSES>                                         1588152
<LOSS-PROVISION>                                               0
<INTEREST-EXPENSE>                                             0
<INCOME-PRETAX>                                          1817393
<INCOME-TAX>                                                   0
<INCOME-CONTINUING>                                      1817393
<DISCONTINUED>                                                 0
<EXTRAORDINARY>                                                0
<CHANGES>                                                      0
<NET-INCOME>                                             1817393
<EPS-BASIC>                                                 3.20
<EPS-DILUTED>                                                  0