This is an interesting and clearly written description of water supplies and their relation to the public health. While little appeal will be made to the engineer because of the elementary character of the presentation, the material is available for the student who is interested in the subject from a general rather than a special point of view. All phases are given consideration, including sources and consumption of water, relation of water to disease, and methods of purification. Unfortunately, many of the tables have not been brought down to the present although in some instances the material is known to be readily available. For example, no figures for water consumption are given later than 1920. The volume is attractively printed and illustrated.