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 and
33-25471) and Form S-3 (File Nos. 33-5780 and 333-70691).


ARTHUR ANDERSEN LLP


Chicago, IL
June 25, 1999