This "e;System of Bacteriology"e; aims at giving a comprehensive survey of our present knowledge ofbacteriology, especially in its relation to medical work. The book gives promise of a very valuablecontribution to scientific literature. Author can has only a superficial knowledge of many of the articles,and his judgment of the whole work must, to a certain extent, be influenced by the quality of thosepapers with which he has an intimate knowledge. It deals with all aspects of plague infection-thecharacters of the bacillus, the problems in plague immunity, the transmission by the rat-flea, the naturaldisease in rodents, and the various forms of plague in man with reference to its pathology, its diagnosis,and treatment. It is a very valuable contribution and must be regarded as a standard work on thesubject.