View of an advertisement for the Detroit Vinegar Works, depicting an apple. Printed on front: "Standard cider vinegar. Certificate of A.B. Lyons, M.D., analytical chemist. This will certify that I have examined the standard cider vinegar manufactured at the Detroit Vinegar Works, and find it to be an excellent article of pure vinegar, well adapted to all uses of the table or the family. A.B. Lyons, M.D., analytical chemist. Prepared only at the Detroit Vinegar Works, 28 Atwater St., Detroit, Mich. The Calvert Lith. Co., Detroit."
