From the Preface; “The Study of physiology should provide guidance for intelligent care of the body at a time in the history of mankind when intelligent living is demanded more and more. One effect of civilization on the race is that health is increasingly harder to maintain. The gradual but pronounced change in the character of our food, the increasing emphasis laid upon studies, the prevalence of bad housing conditions, the increase in sedentary occupations, and the enforced use of transportation facilities are a few of the forces arrayed against the maintenance of health.” Book has writing inside covers. intact and readable pages.