View of an advertising card for Theo Ronnefield, depicting a young woman posing with two cows. Printed on back [in part]: "The Jerseys. Every family needs a serviceable medicine for worms in children, or a useful tonic for the general debility of children, or the dyspepsia of adults. Dr. Jayne's Tonic Vermifuge supplies such a remedy; and besides being reliable and safe as a curative, is pleasant to the taste. Presented by Theo Ronnefeld, 193 and 195 Gratiot Avenue, Detroit, Mich. The Major & Knapp Lith. Co., N.Y."
