The maintenance of good health should be the chief concern of every one; nevertheless there is a surprising ignorance of the mechanisms of the human body, the physiologic processes dealing with growth, nutrition and health, and the hygienic rules necessary for healthy living. Too many of the books written for laymen are meant as guides for self-treatment, which is always dangerous. Others discuss the cause and symptoms of the various diseases, information which is of doubtful value excepting to the physician. This book presents in simple language and interesting style some of the facts concerning physiology, health and prevention of disease that it behooves every one to know. There are chapters on growth and development, physiology, nutrition and foods, health habits, climate, infection, disease prevention and accidents. There are well written discussions of nostrums and quackery, choosing a physician, and the child and the schools. A number of health axioms,