THIS laboratory manual of experimental physiology, first published in 1912, has now reached a third edition. To those who do not know the book it may be said that the matter is arranged in thirty-two chapters, each of which contains, on the average, enough to occupy the student for a laboratory period. The book does not deal with chemical physiology; hence the amount of time demanded by a course such as the present is more than some schools will find themselves able to devote to it; a certain number of the exercises, however, are intended for advanced students, though the author does not attempt to mark these off from the rest, the selection having been left to the teacher. The author's experience is a sufficient guarantee of the suitability of the matter, and of the method of arrangement; the descriptions of the experiments, though concise, are lucid; and the book is amply illustrated by ninety explanatory figures.
By Sir E. Sharpey Schafer. Third edition. Pp. viii+131. (London: Longmans, Green and Co., 1921.) 6s. net.