New Books a Message For You Hygiene Blood and Urine Chemistry By Clair E. Turner, Asst. Prof. of Biology and By R. B. H. Gradwohl, M.D., Director of tho Public Health, Mass. Institute of Technology; Gradwohl Laboratories, Chicago and St. Louis; Chapters by Dean Rice, Tufts Dental College; Director of the Pasteur Institute of St. Louis; Introduction by Wm. T. Sedgwick, Sc.D., Prof. and A. J. Blalvas, formerly Assistant in Chemiof Biology and Public Health, Mass. Institute of cal Laboratory, St. Luke's Hospital, New York. Technology. 400 pages, 52 illustrations. Price, 418 pages, 6 x 9, 75 text illustrations and four color plates. cloth . $4.00 Second edition, revised and en larged. Price, cloth.... Turner has written a book on hygiene along ..$5.00 This second edition represents the accumulated entirely new lines and it is different from any literature of the past three years on blood and thing heretofore published. A valuable book urine chemistry both as regards technic and for dentists, physicians, public health workers, and teachers in colleges. interpretations. Physiological Chemistry Practical Chemical Analysis By Sidney W. Cole, M.A., Trinity College, Cam bridge, England. Introduction by Prof. F. G. of Blood Hopkins, M.B., D.Sc., F.R.C.P., Professor of Bio chemistry, Trinity College, Cambridge. 350 By Victor C. Myers, M.A., Ph.D., Prof. of Patho- pages, 512 x 872, illustrated. 5th edition, enlogical Chemistry, N. Y. Post-Graduate Medical larged. Price, cloth.. $4.50 School and Hospital. 125 pages, 7x 10, with 13 New fifth edition, completely revised. The illustrations. Price, cloth... ..$3.00 book is practical—the text was worked out Myers presents a discussion of the chemical step by step at the laboratory bench at Camblood determinations which have been found of bridge University, England. Modern methods definite value in the treatment and diagnosis of biochemistry are given. of disease. 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