Nygaard has written a splendid monograph on hemorrhagic diseases. The greater part of the book (almost 200 pages) is devoted to results of experimental and laboratory studies, and only the last, or third, section deals with the hemorrhagic diseases from the clinical point of view.
In part I the author discusses the method of determining the coagulability of the blood, elaborates on the photoelectric principle and goes into detail in the succeeding chapters concerning photelography. The coagulability of blood plasma, the interaction of thrombin and fibrinogen and the coagulant effect of thromboplastin are treated in part II.
To the laboratory worker and the hematologist the monograph should be of inestimable value. The material is presented in a clearcut manner and is adequately illustrated with charts, diagrams and tables. In addition, there is an extremely complete review of the literature. Some of the relatively short chapters have as many as 120