Trade card: B Gammage, Son-in-law of the late J. Dicas, No. 17, Clarence St, Liverpool. Manufacturer and only proprietor of the patent for Dicas's hydrometer. Instructions for the use of the hydrometer are printed on both sides of the card. Price-list at the end. Printed by Egerton Smith & Co., Lord Street, q.v.. (Calv. 154)