The reviewer knows of no one better qualified to write a book on preventive medicine and public health than Dr. Smillie. When one glances through the 600 odd closely printed pages, one realizes how large the subject has become. Naturally, there is some overlapping with what one finds in texts on bacteriology, infectious diseases and nutrition, but this can hardly be avoided. The sections on general matters, such as vital statistics and sanitation, are especially well done. On the whole the book is useful both for reference and for a survey of the whole subject.