With the apparent exception of the first article on the "Morphology of Ganglion Cells in the Rabbit," this volume is made up of reprints from various medical journals, all of them duly credited with the source of their first appearance. The director says, in his preface, that it seems that this form of publication—first, the wider circulation which current medical journals afford, and the subsequent grouping together of reprints—would more certainly fulfill the aims of such studies than would a separate department or university publication. The only objection we have to offer is that the difference in type, margin or pages, etc., makes a very clumsy arrangement. This, however, is only a minor objection. The book is a valuable collection of important monographs on the subject considered.