Featured in this lot is this 1916 "Pharmacopoeia of the United States, Ninth Decennial Revision" written by U.S. Pharmacopoeial Convention and published by P. Blakiston's Son & Company. The book serves as a comprehensive reference for drug standards in the United States. This edition continues the mission of ensuring the quality, purity, strength, and consistency of medicines available to the public. The document describes the official criteria for pharmaceuticals, chemicals, and medicinal preparations, including details on composition, strength, quality, and labeling. It also covers analytical methodologies, impurity tests, and drug formulation guidelines. As part of the U.S. Pharmacopeial Convention's larger efforts, the ninth edition contains newly produced medications and preparations as well as advances in pharmaceutical research. The book shows fair to good condition exhibiting wear from its age and use over the years. Foxing and pencil notes are noted throughout, cover is slightly torn. No major signs of damage are noted. It measures 9 1/4" L x 6 1/2" W x 2 1/4" D and weighs 3 pounds and 8 ounces.