<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE SPIRE
CORPORATION UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS AND STATEMENTS OF
OPERATIONS ON FORM 10-QSB FOR THE PERIOD ENDED SEPTEMBER 30, 1999 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FORM 10-QSB.
</LEGEND>

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JUL-01-1999
<PERIOD-END>                               SEP-30-1999
<CASH>                                         333,422
<SECURITIES>                                         0
<RECEIVABLES>                                3,196,389
<ALLOWANCES>                                   102,000
<INVENTORY>                                  1,908,550
<CURRENT-ASSETS>                             3,094,388
<PP&E>                                      26,091,593
<DEPRECIATION>                              21,650,544
<TOTAL-ASSETS>                              10,350,875
<CURRENT-LIABILITIES>                        5,497,231
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        37,972
<OTHER-SE>                                   4,815,672
<TOTAL-LIABILITY-AND-EQUITY>                10,350,875
<SALES>                                        604,760
<TOTAL-REVENUES>                             2,722,028
<CGS>                                          502,679
<TOTAL-COSTS>                                3,550,823
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                            (33,309)
<INCOME-PRETAX>                              (862,104)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                          (862,104)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 (862,104)
<EPS-BASIC>                                     (0.27)
<EPS-DILUTED>                                   (0.27)