This work, by one of the foremost physicians of China, is, without exception, the most thorough and scientific account of pneumonic plague that has ever been written. The author, who has probably had more experience with this type of plague than any other observer, has placed upon record all that he knows regarding this vital and most interesting type of plague. The work is of intense interest to all physicians who have to do with this important infection and considers the subject from the standpoint not only of the clinician, but of the laboratory worker and pathologist. The author's acquaintance with the literature of the subject is very extensive and his bibliographic references are most complete. The reviewer can recommend this work as by far the best upon the subject that has ever appeared in any language and well worthy the perusal and careful study of all interested in tropical diseases.