1
 
                                                                    EXHIBIT 23.1
 
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
     As independent public accountants, we hereby consent to the incorporation
of our reports included in this Form 10-K, into the Company's previously filed
Registration Statements on Form S-8 (33-65041) and 33-67622).
 
/s/ Arthur Andersen LLP
 
Chicago, Illinois
March 25, 1998