In this valuable monograph, the author describes the behavior and growth of epiphysial cartilage, bone, periosteum, and marrow in a clear and interesting manner. His observations are based on extensive, original experiments. Discussions, which are to the point, reveal an understanding of the extensive writings of other investigators. His experiments, designed to study the behavior of epiphysial cartilage, bone, periosteum, and marrow are interesting. The implantation of the tissues under study beneath the capsule of the kidney circumvents the pitfalls of other techniques of experimental observation. Numerous, excellent illustrations supplement the text, and an extensive up-to-date bibliography is included. This small volume contains much information on all aspects of bone organization and growth and should be read by clinicians as well as biologists, anatomists, and embryologists. One rarely encounters monographs that are as instructive and thought provoking as this book.