This is an interesting and instructive book, presenting the subjects of gout, rheumatism and arthritis from a point of view not commonly accepted. The author is not in sympathy with the theories of excess nitrogenous food or of bacterial invasion as etiologic bases of these conditions; the uric acid theory he considers founded on mistakes. He contends that all these conditions are produced by aberrations of physiologic processes rather than by disease, and that these aberrations have to do with the production and elimination of lactic acid. His contentions are logically propounded, and seem well supported by experiment. His therapy is based on the physiology of the skin and its important rôle in elimination.