WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT DECEMBER 31, 1998 AND THE STATEMENT OF OPERATIONS FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS ANNUAL REPORT ON FORM 10-K FOR THE
PERIOD DECEMBER 31, 1998
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               DEC-31-1998
<CASH>                                         780,429
<SECURITIES>                                         0
<RECEIVABLES>                                  229,107
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                             1,009,536
<PP&E>                                      14,429,687
<DEPRECIATION>                               7,605,099
<TOTAL-ASSETS>                               7,834,124
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                             0
<OTHER-SE>                                   7,834,124
<TOTAL-LIABILITY-AND-EQUITY>                 7,834,124
<SALES>                                              0
<TOTAL-REVENUES>                             1,570,553
<CGS>                                                0
<TOTAL-COSTS>                                  931,023
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                      0
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   500,224
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT SEPTEMBER 30, 1998 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE
QUARTERLY PERIOD ENDED SEPTEMBER 30, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD SEPTEMBER 30, 1998
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   9-MOS
[FISCAL-YEAR-END]                          DEC-31-1998
[PERIOD-START]                             JAN-01-1998
[PERIOD-END]                               SEP-30-1998
[CASH]                                         782,212
[SECURITIES]                                         0
[RECEIVABLES]                                  319,799
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                             1,102,011
[PP&E]                                      14,729,410
[DEPRECIATION]                               7,554,588
[TOTAL-ASSETS]                               8,276,833
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                   8,276,833
[TOTAL-LIABILITY-AND-EQUITY]                 8,276,833
[SALES]                                              0
[TOTAL-REVENUES]                             1,229,403
[CGS]                                                0
[TOTAL-COSTS]                                  705,326
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   423,269
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT JUNE 30, 1998 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE
QUARTERLY PERIOD ENDED JUNE 30, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD JUNE 30, 1998.
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   6-MOS
[FISCAL-YEAR-END]                          DEC-31-1998
[PERIOD-START]                             JAN-01-1998
[PERIOD-END]                               JUN-30-1998
[CASH]                                         858,466
[SECURITIES]                                         0
[RECEIVABLES]                                  323,610
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                             1,182,076
[PP&E]                                      15,139,413
[DEPRECIATION]                               7,556,496
[TOTAL-ASSETS]                               8,764,993
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                   8,764,993
[TOTAL-LIABILITY-AND-EQUITY]                 8,764,993
[SALES]                                              0
[TOTAL-REVENUES]                               841,323
[CGS]                                                0
[TOTAL-COSTS]                                  471,791
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   323,773
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT MARCH 31, 1998 (UNAUDITED) AND THE STATEMENT OF OPERATIONS FOR THE
QUARTERLY PERIOD ENDED MARCH 31, 1998 (UNAUDITED) AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD MARCH 31, 1998.
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   3-MOS
[FISCAL-YEAR-END]                          DEC-31-1998
[PERIOD-START]                             JAN-01-1998
[PERIOD-END]                               MAR-31-1998
[CASH]                                         887,297
[SECURITIES]                                         0
[RECEIVABLES]                                  386,185
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                             1,273,482
[PP&E]                                      15,405,791
[DEPRECIATION]                               7,472,306
[TOTAL-ASSETS]                               9,206,967
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                   9,206,967
[TOTAL-LIABILITY-AND-EQUITY]                 9,206,967
[SALES]                                              0
[TOTAL-REVENUES]                               414,931
[CGS]                                                0
[TOTAL-COSTS]                                  239,746
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   145,899
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT DECEMBER 31, 1997 AND THE STATEMENT OF OPERATIONS FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS ANNUAL REPORT ON FORM 10-K FOR THE
PERIOD DECEMBER 31, 1997
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   12-MOS
[FISCAL-YEAR-END]                          DEC-31-1997
[PERIOD-START]                             JAN-01-1997
[PERIOD-END]                               DEC-31-1997
[CASH]                                         999,900
[SECURITIES]                                         0
[RECEIVABLES]                                  385,314
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                             1,385,214
[PP&E]                                      15,717,692
[DEPRECIATION]                               7,400,531
[TOTAL-ASSETS]                               9,702,375
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                   9,702,375
[TOTAL-LIABILITY-AND-EQUITY]                 9,702,375
[SALES]                                              0
[TOTAL-REVENUES]                             1,765,903
[CGS]                                                0
[TOTAL-COSTS]                                  991,785
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                   715,508
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEETS AT MARCH 31, 1997, JUNE 30, 1997 AND SEPTEMBER 30, 1997 (UNAUDITED) AND
THE STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1997, JUNE
30, 1997 AND SEPTEMBER 30, 1997 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS QUARTERLY REPORT
ON FORM 10-Q FOR THE RESPECTIVE PERIODS THEN ENDED
[/LEGEND]
       
<S>                             <C>                     <C>                     <C>
[PERIOD-TYPE]                   3-MOS                   6-MOS                   9-MOS
[FISCAL-YEAR-END]                          DEC-31-1997             DEC-31-1997             DEC-31-1997
[PERIOD-START]                             JAN-01-1997             JAN-01-1997             JAN-01-1997
[PERIOD-END]                               MAR-31-1997             JUN-30-1997             SEP-30-1997
[CASH]                                         896,964                 859,457                 949,776
[SECURITIES]                                         0                       0                       0
[RECEIVABLES]                                  527,711                 484,355                 466,547
[ALLOWANCES]                                         0                       0                       0
[INVENTORY]                                          0                       0                       0
[CURRENT-ASSETS]                             1,424,675               1,343,812               1,416,323
[PP&E]                                      16,481,361              16,365,883              16,014,882
[DEPRECIATION]                               7,066,754               7,249,431               7,312,924
[TOTAL-ASSETS]                              10,839,282              10,460,264              10,188,281
[CURRENT-LIABILITIES]                                0                       0                       0
[BONDS]                                              0                       0                       0
[PREFERRED-MANDATORY]                                0                       0                       0
[PREFERRED]                                          0                       0                       0
[COMMON]                                             0                       0                       0
[OTHER-SE]                                  10,839,282              10,460,264             110,118,281
[TOTAL-LIABILITY-AND-EQUITY]                10,839,282              10,460,264             110,118,281
[SALES]                                              0                       0                       0
[TOTAL-REVENUES]                               452,207                 885,170               1,322,701
[CGS]                                                0                       0                       0
[TOTAL-COSTS]                                  250,729                 503,561                 742,795
[OTHER-EXPENSES]                                     0                       0                       0
[LOSS-PROVISION]                                     0                       0                       0
[INTEREST-EXPENSE]                                   0                       0                       0
[INCOME-PRETAX]                                207,473                       0                       0
[INCOME-TAX]                                         0                       0                       0
[INCOME-CONTINUING]                                  0                       0                       0
[DISCONTINUED]                                       0                       0                       0
[EXTRAORDINARY]                                      0                       0                       0
[CHANGES]                                            0                       0                       0
[NET-INCOME]                                   207,473                 373,192                 543,757
[EPS-PRIMARY]                                        0                       0                       0
[EPS-DILUTED]                                        0                       0                       0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET AT DECEMBER 31, 1996 AND THE STATEMENT OF OPERATIONS FOR THE TWELVE MONTHS
ENDED DECEMBER 31, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS INCLUDED AS PART OF ITS ANNUAL REPORT ON FORM 10-K FOR THE
PERIOD DECEMBER 31, 1996
[/LEGEND]
       
<S>                             <C>
[PERIOD-TYPE]                   12-MOS
[FISCAL-YEAR-END]                          DEC-31-1996
[PERIOD-START]                             JAN-01-1996
[PERIOD-END]                               DEC-31-1996
[CASH]                                         936,081
[SECURITIES]                                         0
[RECEIVABLES]                                  543,250
[ALLOWANCES]                                         0
[INVENTORY]                                          0
[CURRENT-ASSETS]                             1,479,331
[PP&E]                                      16,577,611
[DEPRECIATION]                               6,867,857
[TOTAL-ASSETS]                              11,189,085
[CURRENT-LIABILITIES]                                0
[BONDS]                                              0
[PREFERRED-MANDATORY]                                0
[PREFERRED]                                          0
[COMMON]                                             0
[OTHER-SE]                                  11,189,085
[TOTAL-LIABILITY-AND-EQUITY]                11,189,085
[SALES]                                              0
[TOTAL-REVENUES]                             2,036,698
[CGS]                                                0
[TOTAL-COSTS]                                1,014,502
[OTHER-EXPENSES]                                     0
[LOSS-PROVISION]                                     0
[INTEREST-EXPENSE]                                   0
[INCOME-PRETAX]                                      0
[INCOME-TAX]                                         0
[INCOME-CONTINUING]                                  0
[DISCONTINUED]                                       0
[EXTRAORDINARY]                                      0
[CHANGES]                                            0
[NET-INCOME]                                 1,084,193
[EPS-PRIMARY]                                        0
[EPS-DILUTED]                                        0
        
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEETS AT MARCH 31, 1996, JUNE 30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND
THE STATEMENT OF OPERATIONS FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1996, JUNE
30, 1996 AND SEPTEMBER 30, 1996 (UNAUDITED) AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS INCLUDED AS PART OF ITS QUARTERLY REPORT
ON FORM 10-Q FOR THE RESPECTIVE PERIODS THEN ENDED
[/LEGEND]
       
<S>                             <C>                     <C>                     <C>
[PERIOD-TYPE]                   3-MOS                   6-MOS                   9-MOS
[FISCAL-YEAR-END]                          DEC-31-1996             DEC-31-1996             DEC-31-1996
[PERIOD-START]                             JAN-01-1996             JAN-01-1996             JAN-01-1996
[PERIOD-END]                               MAR-31-1996             JUN-30-1996             SEP-30-1996
[CASH]                                       1,006,105                 970,731               1,055,315
[SECURITIES]                                         0                       0                       0
[RECEIVABLES]                                  637,746                 632,869                 533,907
[ALLOWANCES]                                         0                       0                       0
[INVENTORY]                                          0                       0                       0
[CURRENT-ASSETS]                             1,643,851               1,603,600               1,589,222
[PP&E]                                      17,009,569              16,727,244              16,658,916
[DEPRECIATION]                               6,322,307               6,447,308               6,663,538
[TOTAL-ASSETS]                              12,331,113              11,880,536              11,584,600
[CURRENT-LIABILITIES]                           17,981                   7,783                   4,743
[BONDS]                                              0                       0                       0
[PREFERRED-MANDATORY]                                0                       0                       0
[PREFERRED]                                          0                       0                       0
[COMMON]                                             0                       0                       0
[OTHER-SE]                                  12,313,132              11,873,153              11,579,857
[TOTAL-LIABILITY-AND-EQUITY]                12,331,113              11,880,536              11,584,600
[SALES]                                              0                       0                       0
[TOTAL-REVENUES]                               567,612               1,008,642               1,523,822
[CGS]                                                0                       0                       0
[TOTAL-COSTS]                                  257,385                 512,217                 766,403
[OTHER-EXPENSES]                                     0                       0                       0
[LOSS-PROVISION]                                     0                       0                       0
[INTEREST-EXPENSE]                                   0                       0                       0
[INCOME-PRETAX]                                      0                       0                       0
[INCOME-TAX]                                         0                       0                       0
[INCOME-CONTINUING]                                  0                       0                       0
[DISCONTINUED]                                       0                       0                       0
[EXTRAORDINARY]                                      0                       0                       0
[CHANGES]                                            0                       0                       0
[NET-INCOME]                                   340,567                 514,223                 799,662
[EPS-PRIMARY]                                        0                       0                       0
[EPS-DILUTED]                                        0                       0                       0
        

</TABLE>