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                                                                      EXHIBIT 23

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of our
reports, included or incorporated by reference in this Form 11-K, into the
Company's previously filed registration statements on Form S-8 (File Nos.
333-22035, 333-17473 and 333-75767), Form S-4 (File Nos. 33-302671, 333-88801
and 33-25471) and Form S-3 (File Nos. 33-5780 and 333-70691).

/s/ Arthur Andersen LLP

Chicago, Illinois
May 15, 2000