The fundamental principles, generally accepted indications and technical details of modern blood transfusion are presented clearly and adequately enough. The historical sketch in Chapter I is interesting. The statement (p. 72) that "the corpuscles of Group IV lack iso-agglutinins" must be an error. To claim (p. 52) that in pernicious anemia the patient's life can be prolonged by repeated transfusion for months or even years beyond the time when it otherwise would end hardly seems warranted in face of the great variation in the course and duration of this disease. The possible usefulness of the book in this country is vitiated by a blind and uncompromising adherence to the Moss grouping, now largely abandoned here in favor of the prior Jansky grouping in an effort to avoid unnecessary confusion and eventual disaster. It is unfortunate that the one brief explanation of the differences of these groupings is not correct (p.