1 Exhibit 24(a) CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference in this registration statement on Form S-3 of our reports, dated November 20, 1995, included in the Company's annual report on Form 10-K for the year ended September 30, 1995 and to all references to our Firm included in this registration statement. /s/ Arthur Andersen LLP Boston, Massachusetts October 11, 1996