This book, by the dean of the School of Medicine of the National University of Mexico, is a concise and well written treatise. Although originally intended for the student of medicine, its reading would be profitable to the general practitioner. It is to be regretted that so few pages are dedicated to the nerve cell. Also the analytic index might be more complete. In the exposition of his subject, the author accepts Claude Bernard's division of general physiology into: (1) study of protoplasm; (2) physicochemical requirements of life; (3) functional or destructive phenomena, and (4) plastic or synthetic phenomena. The book contains chapters on conception of the organism, the physicochemical construction of living matter, requirements for life, phenomena of living matter, fermentations and ferments, energetics, excitability and stimuli, general physiology of the nondifferentiated cell, general physiology of ephithelial secreting tissues, connective tissues, internal mediums, muscles and the nerve cell. To