In twelve compact chapters, Dr. Long carries the reader from the period of antiquity, through the period of Galen and the middle ages, to the rise of modern pathology and bacteriology under Rokitansky, Virchow and Pasteur. Since pathology rests inevitably on a knowledge of anatomy and physiology, the work constitutes a good one-volume history of medicine, in which, however, the theme is the direction of study by new information developed at various times concerning the changes that take place in the tissues in disease. The style is simple, direct and, on the whole, quite technical. The book has its chief appeal, therefore, for the medical and technical reader rather than for the layman. The illustrations, which are numerous, add greatly to the attractiveness of the book.