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                                  SCHEDULE 14A
                                 (RULE 14A-101)

                    INFORMATION REQUIRED IN PROXY STATEMENT
                            SCHEDULE 14A INFORMATION

          PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES
                     EXCHANGE ACT OF 1934 (AMENDMENT NO.  )

     Filed by the registrant [X]

     Filed by a party other than the registrant [ ]

     Check the appropriate box:

     [ ] Preliminary proxy statement.       [ ] Confidential, for use of the
                                                Commission only (as permitted by
                                                Rule 14a-6(e)(2).

     [ ] Definitive proxy statement.

     [X] Definitive additional materials.

     [ ] Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12.

                         ILLINOIS SUPERCONDUCTOR, CORP.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified in Its Charter)

 -------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement if Other Than the Registrant)

Payment of filing fee (check the appropriate box):

     [X] No fee required.

     [ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and
         0-11.

     (1) Title of each class of securities to which transaction applies:

- --------------------------------------------------------------------------------

     (2) Aggregate number of securities to which transaction applies:

- --------------------------------------------------------------------------------

     (3) Per unit price or other underlying value of transaction computed
         pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
         filing fee is calculated and state how it was determined):

- --------------------------------------------------------------------------------

     (4) Proposed maximum aggregate value of transaction:

- --------------------------------------------------------------------------------

     (5) Total fee paid:

- --------------------------------------------------------------------------------

     [ ] Fee paid previously with preliminary materials.
- --------------------------------------------------------------------------------

     [ ] Check box if any part of the fee is offset as provided by Exchange Act
         Rule 0-11(a)(2) and identify the filing for which the offsetting fee
         was paid previously. Identify the previous filing by registration
         statement number, or the form or schedule and the date of its filing.

     (1) Amount Previously Paid:

- --------------------------------------------------------------------------------

     (2) Form, Schedule or Registration Statement No.:

- --------------------------------------------------------------------------------

     (3) Filing Party:

- --------------------------------------------------------------------------------

     (4) Date Filed:

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                         [ILLINOIS SUPERCONDUCTOR LOGO]

                       YOUR VOTE IS VERY IMPORTANT TO US

                                                                   June 23, 2000

Dear Fellow Illinois Superconductor Shareholder:

I am writing to personally ask you to take a brief moment to vote your Illinois
Superconductor shares. As you may be aware, our Annual Meeting of shareholders
has been rescheduled to June 30, 2000. The meeting will take place at 10 a.m. at
the offices of Sonnenschein Nath & Rosenthal, 8000 Sears Tower, Chicago,
Illinois.

Illinois Superconductor has agreed to acquire Spectral Solutions, Inc. for 3.5
million shares, and closing of the merger is conditioned upon ISC's shareholders
approving the pending proposal to authorize more ISC shares. Please don't
underestimate the importance of your vote. THERE ARE NEARLY 8,000 SHAREHOLDERS
WHO-- LIKE YOU-- HAVE NOT YET VOTED AND OWN AT LEAST 500 ISC SHARES. OF THE
SHAREHOLDERS WHO HAVE VOTED THUS FAR, OVER 90% HAVE VOTED IN FAVOR OF THE
PROPOSALS. FAILURE TO VOTE IS THE SAME AS A VOTE AGAINST THE PROPOSALS.

Even if you recently sold some or all of your Illinois Superconductor shares,
we ask for your help in voting "FOR" these important proposals. Whether or not
you currently hold the shares, only holders of record on June 6 are entitled to
vote.

Quick and easy telephone and Internet voting instructions are enclosed.


           [PICTURE]                                      [PICTURE]

      Toll-free Voting                                 www.proxyvote.com
       24 hours a day

If you have any questions, please call MacKenzie Partners, Inc at (800)322-2885.

Thank you in advance for voting promptly.

Sincerely,



George Calhoun
Chief Executive Officer