WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<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>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-START> JAN-01-1998
<PERIOD-END> DEC-31-1998
<CASH> 2,407,614
<SECURITIES> 0
<RECEIVABLES> 656,520
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 3,064,134
<PP&E> 62,646,590
<DEPRECIATION> 23,010,870
<TOTAL-ASSETS> 42,699,854
<CURRENT-LIABILITIES> 462,948
<BONDS> 0
<PREFERRED-MANDATORY> 0
<PREFERRED> 0
<COMMON> 0
<OTHER-SE> 42,236,906
<TOTAL-LIABILITY-AND-EQUITY> 42,699,854
<SALES> 0
<TOTAL-REVENUES> 5,116,640
<CGS> 0
<TOTAL-COSTS> 3,799,065
<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> 1,412,913
<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
ANNUAL REPORT ON FORM 10-K FOR THE PERIOD SEPTEMBER 30, 1998.
[/LEGEND]
[PERIOD-TYPE] 9-MOS
[FISCAL-YEAR-END] DEC-31-1998
[PERIOD-START] JAN-01-1998
[PERIOD-END] SEP-30-1998
[CASH] 2,255,292
[SECURITIES] 0
[RECEIVABLES] 936,242
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 3,191,534
[PP&E] 62,825,287
[DEPRECIATION] 22,162,669
[TOTAL-ASSETS] 43,854,152
[CURRENT-LIABILITIES] 462,948
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 43,391,204
[TOTAL-LIABILITY-AND-EQUITY] 43,854,152
[SALES] 0
[TOTAL-REVENUES] 4,033,477
[CGS] 0
[TOTAL-COSTS] 2,840,811
[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] 1,260,104
[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]
[PERIOD-TYPE] 6-MOS
[FISCAL-YEAR-END] DEC-31-1998
[PERIOD-START] JAN-01-1998
[PERIOD-END] JUN-30-1998
[CASH] 2,341,944
[SECURITIES] 0
[RECEIVABLES] 888,697
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 3,230,641
[PP&E] 62,929,298
[DEPRECIATION] 21,283,485
[TOTAL-ASSETS] 44,876,454
[CURRENT-LIABILITIES] 462,948
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 44,413,506
[TOTAL-LIABILITY-AND-EQUITY] 44,876,454
[SALES] 0
[TOTAL-REVENUES] 2,780,862
[CGS] 0
[TOTAL-COSTS] 1,893,620
[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] 941,694
[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]
[PERIOD-TYPE] 3-MOS
[FISCAL-YEAR-END] DEC-31-1998
[PERIOD-START] JAN-01-1998
[PERIOD-END] MAR-31-1998
[CASH] 2,088,346
[SECURITIES] 0
[RECEIVABLES] 1,041,410
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 3,129,756
[PP&E] 63,012,440
[DEPRECIATION] 20,394,561
[TOTAL-ASSETS] 45,747,635
[CURRENT-LIABILITIES] 462,948
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 45,284,687
[TOTAL-LIABILITY-AND-EQUITY] 45,747,635
[SALES] 0
[TOTAL-REVENUES] 1,389,954
[CGS] 0
[TOTAL-COSTS] 949,754
[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] 472,162
[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 ENDED DECEMBER 31, 1997.
[/LEGEND]
[PERIOD-TYPE] 12-MOS
[FISCAL-YEAR-END] DEC-31-1997
[PERIOD-START] JAN-01-1997
[PERIOD-END] DEC-31-1997
[CASH] 1,883,389
[SECURITIES] 0
[RECEIVABLES] 1,094,453
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 2,977,842
[PP&E] 63,162,608
[DEPRECIATION] 19,524,264
[TOTAL-ASSETS] 46,616,186
[CURRENT-LIABILITIES] 462,948
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 46,153,238
[TOTAL-LIABILITY-AND-EQUITY] 46,616,186
[SALES] 0
[TOTAL-REVENUES] 5,664,267
[CGS] 0
[TOTAL-COSTS] 3,952,534
[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] 1,843,048
[EPS-PRIMARY] 0
[EPS-DILUTED] 0
[ARTICLE] 5 [LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET 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]
[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] 1,750,995 1,653,049 1,616,451
[SECURITIES] 0 0 0
[RECEIVABLES] 1,097,401 1,044,323 1,195,517
[ALLOWANCES] 0 0 0
[INVENTORY] 0 0 0
[CURRENT-ASSETS] 2,848,396 2,697,372 2,811,968
[PP&E] 63,500,454 63,405,182 63,301,457
[DEPRECIATION] 16,876,941 17,776,635 18,645,814
[TOTAL-ASSETS] 49,557,236 48,364,211 47,480,280
[CURRENT-LIABILITIES] 626,330 551,330 476,330
[BONDS] 0 0 0
[PREFERRED-MANDATORY] 0 0 0
[PREFERRED] 0 0 0
[COMMON] 0 0 0
[OTHER-SE] 48,930,906 47,812,881 47,003,950
[TOTAL-LIABILITY-AND-EQUITY] 49,557,236 48,364,211 48,480,280
[SALES] 0 0 0
[TOTAL-REVENUES] 1,396,464 2,743,047 4,230,484
[CGS] 0 0 0
[TOTAL-COSTS] 1,003,834 2,009,504 2,976,765
[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] 429,063 790,446 1,353,048
[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]
[PERIOD-TYPE] 12-MOS
[FISCAL-YEAR-END] DEC-31-1996
[PERIOD-START] JAN-01-1996
[PERIOD-END] DEC-31-1996
[CASH] 2,262,639
[SECURITIES] 0
[RECEIVABLES] 1,217,996
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 3,480,635
[PP&E] 63,140,873
[DEPRECIATION] 15,961,254
[TOTAL-ASSETS] 50,805,865
[CURRENT-LIABILITIES] 701,330
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 50,104,535
[TOTAL-LIABILITY-AND-EQUITY] 50,805,865
[SALES] 0
[TOTAL-REVENUES] 6,979,978
[CGS] 0
[TOTAL-COSTS] 4,023,918
[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] 3,156,373
[EPS-PRIMARY] 0
[EPS-DILUTED] 0
[ARTICLE] 5
[LEGEND]
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET 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 PERIOD MARCH 31, 1996, JUNE 30, 1996 AND
SEPTEMBER 30, 1996.
[/LEGEND]
[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] 2,485,095 2,254,369 2,331,629
[SECURITIES] 0 0 0
[RECEIVABLES] 1,349,966 1,334,468 1,152,907
[ALLOWANCES] 0 0 0
[INVENTORY] 0 0 0
[CURRENT-ASSETS] 3,835,061 3,588,837 3,484,536
[PP&E] 63,290,704 63,242,866 63,202,036
[DEPRECIATION] 13,264,797 14,168,915 15,058,876
[TOTAL-ASSETS] 54,187,433 52,928,968 51,883,592
[CURRENT-LIABILITIES] 1,088,882 883,585 791,628
[BONDS] 0 0 0
[PREFERRED-MANDATORY] 0 0 0
[PREFERRED] 0 0 0
[COMMON] 0 0 0
[OTHER-SE] 53,098,551 52,045,383 51,041,964
[TOTAL-LIABILITY-AND-EQUITY] 54,187,433 52,928,968 51,833,592
[SALES] 0 0 0
[TOTAL-REVENUES] 1,862,918 3,622,333 5,297,219
[CGS] 0 0 0
[TOTAL-COSTS] 1,007,658 2,015,379 3,024,631
[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] 910,819 1,706,910 2,429,468
[EPS-PRIMARY] 0 0 0
[EPS-DILUTED] 0 0 0