This book may be perhaps best described by the word old fashioned. While some of the results of modern investigation are given place in it, there is also much material of doubtful value at the present time. The chapter on ventilation furnishes a good instance of a somewhat outgrown point of view. In discussing sewers, the author evidently feels some reluctance about dropping the notion that "bacteria may have come from the defective drains" (page 223). The text contains a good deal of repetition, and some of the illustrations, such as those of eight different types of water closet, seem somewhat superfluous. The book would be more useful if unnecessary material could be eliminated, and a more positive mode of statement adopted.