Part I gives a clear, concise and well illustrated method for the performance of proctoscopic examination. It is based on the author's large experience in this field and offers many practical suggestions which will facilitate the examination. Part II includes a classification of diarrheas from the etiologic standpoint and a brief discussion of treatment. The author has attempted to cover too much ground in too short a space. The classification, treatment and references are incomplete, so that the second portion of the book suffers by comparison with the first portion.