By Henry V. Arny, Ph.G., Ph.D., Professor of Chemistry in the College of Pharmacy, columbia University; Member of the Committee of Revision of the U. S. Pharmacopoeia, Second Edition, Revised and Entirely Reset. Octavo of 1056 pages with 267 illustrations, Philadelphia and London: W. B. Saunders Company, 1917. Cloth, $5.50 net. W. B. Saunders Company, Philadelphia, London

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