<ARTICLE> 5
       
                                                  
<PERIOD-TYPE>                   12-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1994             DEC-31-1995
<PERIOD-END>                               DEC-31-1994             MAR-31-1995
<CASH>                                       1,473,850               1,646,322
<SECURITIES>                                         0                       0
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<DEPRECIATION>                            (19,195,571)            (19,803,245)
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<CURRENT-LIABILITIES>                                0                       0
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<OTHER-SE>                                  32,401,855              32,008,843
<TOTAL-LIABILITY-AND-EQUITY>                45,208,188              47,757,913
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