CUSIP No. 848565107

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D

                               (Amendment No. 1)

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                Spire Corporation

                                (Name of Issuer)

                                  Common Stock

                         (Title of Class of Securities)

                                    848565107

                                 (CUSIP Number)

                            Joseph P. Bartlett, Esq.
                Greenberg Glusker Fields Claman & Machtinger LLP
                      1900 Avenue of the Stars, Suite 2100
                              Los Angeles, CA 90067
                                 (310) 201-7481

   (Name, Address and Telephone Number of Person Authorized to Receive Notices
                               and Communications)

                               September 21, 2007
             (Date of Event which Requires Filing of this Statement)

If the reporting person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g),
check the following box / /.

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Section 240.13d-7(b) for
other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).




CUSIP No. 848565107

--------------------------------------------------------------------------------
1.   Name of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     David Gelbaum, Trustee, The Quercus Trust
--------------------------------------------------------------------------------
2.   Check the Appropriate Box If a Member of a Group (See Instructions)
     (a)  [X]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions)
     PF
--------------------------------------------------------------------------------
5.   Check If Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization
     U.S.
--------------------------------------------------------------------------------
               7.   Sole Voting Power
  NUMBER OF         -0-
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared Voting Power
 OWNED BY           535,058
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole Dispositive Power
   PERSON           -0-
    WITH       -----------------------------------------------------------------
               10.  Shared Dispositive Power
                    535,058
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person
     535,058
--------------------------------------------------------------------------------
12.  Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11)
     6.5%(1)
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions)
     IN
--------------------------------------------------------------------------------

_______________________
(1)   Based on 8,273,887 shares of Common Stock outstanding, as reported in the
      Issuer's Quarterly Report on Form 10-Q for the quarter period ended June
      30, 2007.



                                       2


CUSIP No. 848565107

--------------------------------------------------------------------------------
1.   Name of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     Monica Chavez Gelbaum, Trustee, The Quercus Trust
--------------------------------------------------------------------------------
2.   Check the Appropriate Box If a Member of a Group (See Instructions)
     (a)  [X]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions)
     PF
--------------------------------------------------------------------------------
5.   Check If Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization
     U.S.
--------------------------------------------------------------------------------
               7.   Sole Voting Power
  NUMBER OF         -0-
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared Voting Power
 OWNED BY           535,058
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole Dispositive Power
   PERSON           -0-
    WITH       -----------------------------------------------------------------
               10.  Shared Dispositive Power
                    535,058
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person
     535,058
--------------------------------------------------------------------------------
12.  Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11)
     6.5%(1)
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions)
     IN
--------------------------------------------------------------------------------

_______________________

(1)   Based on 8,273,887 shares of Common Stock outstanding, as reported in the
      Issuer's Quarterly Report on Form 10-Q for the quarter period ended June
      30, 2007.


                                       3


CUSIP No. 848565107

--------------------------------------------------------------------------------
1.   Name of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     David Gelbaum, Trustee, The Quercus Trust
--------------------------------------------------------------------------------
2.   Check the Appropriate Box If a Member of a Group (See Instructions)
     (a)  [X]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions)
     PF
--------------------------------------------------------------------------------
5.   Check If Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization
     U.S.
--------------------------------------------------------------------------------
               7.   Sole Voting Power
  NUMBER OF         -0-
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared Voting Power
 OWNED BY           535,058
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole Dispositive Power
   PERSON           -0-
    WITH       -----------------------------------------------------------------
               10.  Shared Dispositive Power
                    535,058
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person
     535,058
--------------------------------------------------------------------------------
12.  Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11)
     6.5%(1)
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions)
     OO
--------------------------------------------------------------------------------

______________________

(1)   Based on 8,273,887 shares of Common Stock outstanding, as reported in the
      Issuer's Quarterly Report on Form 10-Q for the quarter period ended June
      30, 2007.

                                       4


Item 1.

      This Amendment No. 1 to Schedule 13D (this "Amendment No. 1") amends and
restates, where indicated, the statement on Schedule 13D relating to the Common
Stock of the Issuer filed by The Quercus Trust, David Gelbaum and Monica Chavez
Gelbaum (the "reporting persons") with the Securities and Exchange Commission on
August 31, 2007 (the "Initial Schedule 13D"). Capitalized terms used in this
Amendment No. 1 but not otherwise defined herein have the meanings given to them
in the Initial Schedule 13D.

      This Amendment No. 1 is being made to disclose the acquisition of
additional shares (the "Shares") of Common Stock of the Issuer. Except as
otherwise set forth herein, this Amendment No. 1 does not modify any of the
information previously reported by the reporting persons in the Initial Schedule
13D.

Item 5.  Interest in Securities of the Issuer

      (a) As of the date of this Amendment No. 1, each reporting person
beneficially owns 535,058 shares of Common Stock, which are held of record by
the Trust.

      (b) Each of David Gelbaum and Monica Chavez Gelbaum, acting alone, has the
power to exercise voting and investment control over the shares of Common Stock
owned by the Trust.

      (c) Since September 1, 2007, the Trust has purchased shares of Common
Stock in brokered transactions as follows:


                   Date               Number of Shares          Price Per Share
                   ----               ----------------          ---------------
                 9/5/2007                   7,381                  $ 10.2261
                 9/6/2007                   5,819                  $ 10.5690
                 9/7/2007                   3,130                  $ 10.3266
                9/10/2007                   2,700                  $ 10.1696
                9/11/2007                   3,970                  $ 10.3686
                9/12/2007                   2,300                  $ 10.4000
                9/13/2007                   3,000                  $ 10.4190
                9/14/2007                   4,700                  $ 10.5566
                9/17/2007                   8,764                  $ 10.9404
                9/18/2007                   3,300                  $ 11.0806
                9/19/2007                   6,500                  $ 11.1741
                9/20/2007                  22,436                  $ 11.6210
                9/21/2007                  14,647                  $ 12.0761
                9/24/2007                  26,400                  $ 14.5791

      (d) Not applicable.

      (e) Not applicable.


                                       5


Item 6.  Contracts, Arrangements, Understandings or Relationships With
         Respect to Securities of the Issuer

      Pursuant to the Power of Attorney filed as Exhibit "B" to Amendment No. 1
to Schedule 13D filed on August 24, 2007 with respect to the issuer Emcore
Corp., David Gelbaum has been appointed as Monica Chavez Gelbaum's
Attorney-In-Fact.

Item 7.  Material to Be Filed as Exhibits

      Exhibit A: Agreement Regarding Joint Filing of Amendment No. 1 to Schedule
13D.





SIGNATURE

      After reasonable inquiry and to the best of its knowledge and belief, each
of the undersigned certifies that the information set forth in this statement is
true, complete and correct and agrees that this statement may be filed jointly
with the other undersigned parties.


Dated: September 28, 2007         /s/ David Gelbaum
                                  ----------------------------------------------
                                  David Gelbaum, Co-Trustee of The Quercus Trust



                                  /s/ David Gelbaum, as Attorney-In-Fact for
                                      Monica Chavez Gelbaum
                                  ----------------------------------------------
                                  Monica Chavez Gelbaum, Co-Trustee of The
                                  Quercus Trust



                                  /s/ David Gelbaum
                                  ----------------------------------------------
                                  The Quercus Trust, David Gelbaum, Co-Trustee
                                  of The Quercus Trust





CUSIP No. 848565107

                                    EXHIBIT A

       AGREEMENT REGARDING JOINT FILING OF AMENDMENT NO. 1 TO SCHEDULE 13D
       -------------------------------------------------------------------



      The undersigned agree that the Schedule 13D with respect to the Common
Stock of Spire Corporation is a joint filing being made on their behalf.


Dated: September 28, 2007         /s/ David Gelbaum
                                  ----------------------------------------------
                                  David Gelbaum, Co-Trustee of The Quercus Trust



                                  /s/ David Gelbaum, as Attorney-In-Fact for
                                      Monica Chavez Gelbaum
                                  ----------------------------------------------
                                  Monica Chavez Gelbaum, Co-Trustee of The
                                  Quercus Trust



                                  /s/ David Gelbaum
                                  ----------------------------------------------
                                  The Quercus Trust, David Gelbaum, Co-Trustee
                                  of The Quercus Trust