<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
QUARTERLY REPORT ON FORM 10-Q FOR THE PERIOD ENDED JUNE 30, 1996 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               JUN-30-1996
<EXCHANGE-RATE>                                      1
<CASH>                                      18,613,906
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                            19,281,945
<PP&E>                                       6,763,181
<DEPRECIATION>                               5,283,637
<TOTAL-ASSETS>                              20,761,489
<CURRENT-LIABILITIES>                        6,382,191
<BONDS>                                              0
<COMMON>                                        13,564
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                  14,365,734
<TOTAL-LIABILITY-AND-EQUITY>                20,761,489
<SALES>                                              0
<TOTAL-REVENUES>                             1,746,301
<CGS>                                                0
<TOTAL-COSTS>                                7,605,823
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                            (5,319,608)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (5,319,608)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (5,319,608)
<EPS-PRIMARY>                                   (0.39)
<EPS-DILUTED>                                   (0.39)