This work is of practical value to dairymen, cattlemen and officers of health boards, and contains much that is interesting and suggestive to physicians and others, who are studying the problems of tuberculosis. It consists of articles previously published in the German medical press, brought together and translated by Charles Bolduan. The author believes that a primary intestinal infection is necessary for the development of consumption in both man and animals, and that this infection occurs in very early infancy, and states that "the milk fed to infants is the chief cause of consumption." He intimates that infection of the very young readily occurs, because the intestinal mucous membrane of the new-born possesses no continuous epithelial covering and is lacking in development of the tubes of the ferment-producing glands. The second article consists of observations concerning the study of phthisiogenesis in man and animals.