Envelope for the J.F. Hartz Co. Printed on front: "The J.F. Hartz Co. Physicians', nurses', hospital and sick room supplies. 1529 Broadway. Near Grand Circus Park, opposite New Paramount Theatre. Detroit, Mich., U.S.A." Printed on back: "A mail order is regarded by us as a mark of confidence expressed toward our house and we fully reciprocate that confidence by making selections and giving as good value as though goods were bought in person."