In this edition the same high standard of scientific accuracy and fundamental approach has been maintained as in the first. A good deal of material has been added, including many recent contributions to the subject. The sections on circulation, respiratory function of the blood, carbohydrate metabolism, muscle chemistry, the eye and the ear have been contributed to this edition by experts in these fields. Uniformity with the rest of the work has, however, been achieved, and there is a minimum of duplication. The bibliography is restricted to monographs and review articles in most instances. The book therefore is not of great use in looking up the literature of the subjects discussed. There is, however, an exceptionally complete index. Barring one or two of the more encyclopedic works, this is the most critical and reliable textbook now available for students of human physiology.