Prof. Horsford's Phosphatic Baking Powder; Rumford Chemical Works
Providence, RI: Rumford Chemical Works, [1890-1906]. 1 card, 12 cm x 8 cm. This card bears the name of Professor Eben Horsford who was among the first to suggest replacing the expensive and imported cream of tartar in baking powder with calcium acid phosphate, which he patented a process to..... More