The subject material in this monograph is supplementary to that contained in an earlier publication by the same author (Dynamics of Inflammation, New York, The Macmillan Company, 1940). The monograph is a very good brief review of the researches of Menkin on inflammation during the past decade. The data presented are almost entirely those obtained in the author's own researches, the work of other investigators being cited only when they appeared to substantiate Menkin's results and conclusions. The format, type and reproduction of the illustrations are excellent. The volume is stimulating; it presents the work of an imaginative investigator on a very important process but also contains considerable material with which many pathologists and biochemists will not agree.