The situation in Germany with respect to tuberculosis has always been more acute than in America, owing in part to a higher incidence of the disease, especially among children, and in part to the greater economic problem presented by the lower classes. Despite this fact, the growth of the outdoor sanatorium method of treatment has not been commensurate with that in certain other countries where the need is less urgent. The monograph here reviewed is an earnest and interesting attempt at solving some of the problems in a large city without the expense of hospitalization or change of climate.
The author first discusses the effects of heliotherapy, the beneficial results of which he believes are due not alone to the effects of exposure to the ultraviolet rays, but to the hyperemia of the underlying structures, which is a secondary effect of such irradiation. The latter view follows closely along the