CATALOG 1952-1953 PCY. 514.-Synthetic Medicinal Products. 6 hours laboratory. 2 credits. Accompanying laboratory course for PCY. 512. Offered 2. Synthesis of organic medicinal compounds. PCY. 521.-Natural Medicinal Products. 3 hours. 3 credits. Offered 1. Chemistry of compounds derived from plants and animals. PCY. 522.-Natural Medicinal Products. 3 hours. 3 credits. The second half of the course PCY. 521-522. Offered 2. PCY. 523.-Natural Medicinal Products. 6 hours laboratory. 2 credits. Accompanying laboratory course for PCY. 521. Offered 1. Isolation and identification of plant and animal products. PCY. 524.-Natural Medicinal Products. 6 hours laboratory. 2 credits. Accompanying laboratory course for PCY. 522. Offered 2. Isolation and identification of plant and animal products. PCY. 531.-Analytical and Control Methods. 2 hours, and 9 hours lab- oratory. 5 credits. Not offered 1952-53. Analytical and control methods with emphasis on the more complicated procedures of the U.S.P., N.F., A.O.A.C., and recent literature. PCY. 532.-Analytical and Control Methods. 2 hours, and 9 hours lab- oratory. 5 credits. The second half of the course PCY. 531-532. Not offered 1952-53. PHARMACOGNOSY Instructional Staff 1951-52 Voss, Elbert, Head; Haskell, A. R., Johnson, C. H. PGY. 221.-Practical Pharmacognosy. 2 hours, and 3 hours laboratory. 3 credits. Offered 1, 2. Sources of crude drugs and systematic classification of the vegetable and animal drugs of the United States Pharmacopeia and National Formulary. PGY. 222.-Practical Pharmacognosy. 2 hours, and 3 hours laboratory. 3 credits. The second half of the course PGY. 221-222. Offered 2, 3. GRADUATE COURSES PGY. 501.-Advanced Histology and Microscopy of Vegetable Drugs. 2 hours, and 6 hours laboratory and field work. 4 credits. Offered 1. Advanced study of microscopic structure and identification of drugs. Preparation of permanent mounts. Detection of adulterations. PGY. 503.-Microanalytical Pharmacognosy. 6 hours laboratory. 2 credits. Not offered 1952-53. A study of plant constituents employing micro methods. PGY. 504.-Cultivation and Processing of Medicinal Plants. 1 hour, and 3 hours laboratory. 2 credits. Not offered 1952-53. Commercial sources, culture and preparation of botanical drugs. The statement "Offered 1" means offered first semester; 2, second semester; 3, summer session.