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, File Nos. 2- 64668, 2-40183, 2-80336 and 33-57189. ARTHUR ANDERSEN LLP Chicago, Illinois, March 30, 2000