|Coopers |certified public accountants |&Lybrand Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 We are aware that our report dated July 30, 1993, on our review of interim condensed consolidated financial information of Minnesota Mining and Manufacturing Company and subsidiaries for the six-month period ended June 30, 1993, and included in the Form 10-Q for the period then ended, is incorporated by reference in the Company's registration statements on Form S-8 (Registration Nos. 2-78422, 33-14791, 33-48690 and 33-49842), and Form S-3 (Registration No. 33-48089). Pursuant to Rule 436(c), under the Securities Act of 1933, this report should not be considered a part of the registration statements prepared or certified by us within the meaning of Sections 7 and 11 of that Act. COOPERS & LYBRAND St. Paul, Minnesota August 9, 1993