EXHIBIT 23.6
 
                      CONSENT OF INDEPENDENT ACCOUNTANTS
   
As independent public accountants, we hereby consent to the use of our report
and to all references to our Firm included in or made a part of this
registration statement.     
 
                                                 /s/ Arthur Andersen LLP
                                          -------------------------------------
                                                   ARTHUR ANDERSEN LLP
 
Chicago, Illinois
   
December 8, 1997