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 10-K, into the
Company's previously filed Registration Statements on Form S-8 (registration
nos. 33-7201, 33-17447, 33-26733, 33-35936, 33-63702, 33-64266, 33-62285, 33-
64427, 33-64431 and 333-01325), previously filed Registration Statement on Form
S-3 (registration no. 333-6879) and previously filed Registration Statement on
Form S-4 (registration no. 33-56891).



                                    /s/ Arthur Andersen LLP

                                    ARTHUR ANDERSEN LLP


Chicago, Illinois
March 26, 1997