Textbook of Embryology

of the scientist in the service of the state" we gain but a scant impression of the qualities of the Park we knew, for however true such an epigrammatic statement may be it fails to reveal the genial humanitarian spirit which was the essence of the man. Fortunately, Wade Oliver has made this facet of Park's life a dominant note throughout the pages of the book. The important fact is not that Park could discover this or that important fact or apply a fact disclosed by another; rather, it is that he saw beyond the facts, and out of his vision he constructed an element of civilized living without which preventive medicine as we know it could not exist. Is it not ironical that so many of those saved from the bacillus of Klebs should be destined to fall before the Kultur of an era so foreign to both Klebs and Park? To those who wish to learn of the establishment of the "germ theory" of contagious disease and to those who would become familiar with one who may be called a "benefactor of mankind," this book is commended. Jordon and Kindred's well-known Textbook of Embryology has been improved in this revised edition. Although new figures and text material have been added, the total number of pages has not been increased over the original number of 613. An account of human development, as in the first edition, is supported and made more clear by citing examples from non-human material. Information from some experimental embryological data has been distributed throughout the text. This enriches the story and gives emphasis to an important source of knowledge that has helped explain mechanics in development. The reviewer would like to remark in passing that an ideal modern textbook in embryology for medical students is still unwritten. It would not be imnpossible to present successfully and adequately a relatively short account of mammalian development combined with critically selected illustrations from comparative and experimental studies in embryology. This would not only be a most interesting and exciting story but it could leave the student with some stimulating ideas about problems of broad biological significance. A very attractive and pleasing change from the first five editions of this text has been made in the typography and binding. The subject matter has