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 PRT 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> 786,433
<SECURITIES> 0
<RECEIVABLES> 137,087
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 923,520
<PP&E> 6,971,959
<DEPRECIATION> 4,742,260
<TOTAL-ASSETS> 3,153,219
<CURRENT-LIABILITIES> 0
<BONDS> 0
<PREFERRED-MANDATORY> 0
<PREFERRED> 0
<COMMON> 0
<OTHER-SE> 3,153,219
<TOTAL-LIABILITY-AND-EQUITY> 3,153,219
<SALES> 0
<TOTAL-REVENUES> 991,709
<CGS> 0
<TOTAL-COSTS> 243,570
<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> 1,146,964
<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]
[PERIOD-TYPE] 9-MOS
[FISCAL-YEAR-END] DEC-31-1998
[PERIOD-START] JAN-01-1998
[PERIOD-END] SEP-30-1998
[CASH] 908,080
[SECURITIES] 0
[RECEIVABLES] 138,643
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 1,046,723
[PP&E] 7,468,869
[DEPRECIATION] 5,042,922
[TOTAL-ASSETS] 3,472,670
[CURRENT-LIABILITIES] 0
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 3,472,670
[TOTAL-LIABILITY-AND-EQUITY] 3,472,670
[SALES] 0
[TOTAL-REVENUES] 766,543
[CGS] 0
[TOTAL-COSTS] 194,366
[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] 893,982
[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
ENTIRELY 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] 1,039,285
[SECURITIES] 0
[RECEIVABLES] 170,616
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 1,209,901
[PP&E] 8,086,894
[DEPRECIATION] 5,423,680
[TOTAL-ASSETS] 3,873,115
[CURRENT-LIABILITIES] 0
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 3,873,115
[TOTAL-LIABILITY-AND-EQUITY] 3,873,115
[SALES] 0
[TOTAL-REVENUES] 527,699
[CGS] 0
[TOTAL-COSTS] 137,921
[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] 616,542
[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] 1,068,637
[SECURITIES] 0
[RECEIVABLES] 275,147
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 1,343,784
[PP&E] 8,763,446
[DEPRECIATION] 5,845,343
[TOTAL-ASSETS] 4,261,887
[CURRENT-LIABILITIES] 0
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 4,261,887
[TOTAL-LIABILITY-AND-EQUITY] 4,261,887
[SALES] 0
[TOTAL-REVENUES] 269,586
[CGS] 0
[TOTAL-COSTS] 83,668
[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] 297,301
[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]
[PERIOD-TYPE] 12-MOS
[FISCAL-YEAR-END] DEC-31-1997
[PERIOD-START] JAN-01-1997
[PERIOD-END] DEC-31-1997
[CASH] 1,274,362
[SECURITIES] 0
[RECEIVABLES] 319,299
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 1,593,661
[PP&E] 9,491,785
[DEPRECIATION] 6,277,270
[TOTAL-ASSETS] 4,808,176
[CURRENT-LIABILITIES] 0
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 4,808,176
[TOTAL-LIABILITY-AND-EQUITY] 4,808,176
[SALES] 0
[TOTAL-REVENUES] 1,299,590
[CGS] 0
[TOTAL-COSTS] 621,909
[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] 1,216,426
[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]
[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-30-1997 JUN-30-1997 SEP-30-1997
[CASH] 1,403,584 1,584,210 1,254,994
[SECURITIES] 0 0 0
[RECEIVABLES] 558,803 471,338 472,943
[ALLOWANCES] 0 0 0
[INVENTORY] 0 0 0
[CURRENT-ASSETS] 1,962,387 2,055,548 1,727,937
[PP&E] 13,023,641 11,336,424 10,411,132
[DEPRECIATION] 8,253,040 7,294,869 6,814,848
[TOTAL-ASSETS] 6,732,988 6,097,103 5,324,221
[CURRENT-LIABILITIES] 0 0 0
[BONDS] 0 0 0
[PREFERRED-MANDATORY] 0 0 0
[PREFERRED] 0 0 0
[COMMON] 0 0 0
[OTHER-SE] 6,732,988 6,097,103 5,324,221
[TOTAL-LIABILITY-AND-EQUITY] 6,732,988 6,097,103 5,324,221
[SALES] 0 0 0
[TOTAL-REVENUES] 333,453 662,644 1,015,665
[CGS] 0 0 0
[TOTAL-COSTS] 196,826 374,168 517,705
[OTHER-EXPENSES] 0 0 0
[LOSS-PROVISION] 0 0 0
[INTEREST-EXPENSE] 0 0 0
[INCOME-PRETAX] 279,061 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] 279,061 577,149 919,010
[EPS-PRIMARY] 0 0 0
[EPS-DILUTED] 0 0 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
OF FORM 10-Q FOR THE RESPECTIVE PERIODS THEN ENDED
[/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] 1,506,264 1,607,032 1,563,742
[SECURITIES] 0 0 0
[RECEIVABLES] 811,697 679,880 559,669
[ALLOWANCES] 0 0 0
[INVENTORY] 0 0 0
[CURRENT-ASSETS] 2,317,961 2,286,912 2,123,411
[PP&E] 17,406,934 16,312,526 15,454,149
[DEPRECIATION] 10,170,589 9,733,093 9,427,805
[TOTAL-ASSETS] 9,554,306 8,866,345 8,149,755
[CURRENT-LIABILITIES] 0 0 0
[BONDS] 0 0 0
[PREFERRED-MANDATORY] 0 0 0
[PREFERRED] 0 0 0
[COMMON] 0 0 0
[OTHER-SE] 9,554,306 8,866,345 8,149,755
[TOTAL-LIABILITY-AND-EQUITY] 9,554,306 8,866,345 8,149,755
[SALES] 0 0 0
[TOTAL-REVENUES] 598,363 1,040,092 1,496,572
[CGS] 0 0 0
[TOTAL-COSTS] 246,022 481,235 704,844
[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] 534,998 856,331 1,254,484
[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 ENDED 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] 1,443,622
[SECURITIES] 0
[RECEIVABLES] 484,449
[ALLOWANCES] 0
[INVENTORY] 0
[CURRENT-ASSETS] 1,928,071
[PP&E] 14,523,765
[DEPRECIATION] 9,033,806
[TOTAL-ASSETS] 5,489,959
[CURRENT-LIABILITIES] 0
[BONDS] 0
[PREFERRED-MANDATORY] 0
[PREFERRED] 0
[COMMON] 0
[OTHER-SE] 7,418,030
[TOTAL-LIABILITY-AND-EQUITY] 7,418,030
[SALES] 0
[TOTAL-REVENUES] 1,885,371
[CGS] 0
[TOTAL-COSTS] 911,772
[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] 1,592,309
[EPS-PRIMARY] 0
[EPS-DILUTED] 0