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The rapidly developing appreciation of the importance of preventive medicine by the general public and by the medical profession has brought home to the medical school the problem of teaching "disease prevention" in its broadest sense. It is my hope to summarize the influences of some of the more important agencies that have led up to the popular demand for preventive measures in medical practice, and to point out a way in which the average medical school, not associated with a school of public health, may prepare the prospective medical graduate to meet the situation. The material is discussed under two general headings: (1) influences that are developing an ever increasing demand for disease prevention in the practice of medicine, and (2) preventive medicine in the medical curriculum.INFLUENCES DEVELOPING AN EVER INCREASING DEMAND FOR DISEASE PREVENTION IN PRACTICE OF MEDICINEPreventive medicine is commonly defined as the medicine of

Tuberculous lesions of the vascular system have long been of interest as points of distribution of bacilli in cases of general miliary tuberculosis. The following example of such a lesion is noteworthy for two reasons: first, on account of its rarity; second, because it gave rise to the presence of great numbers of tubercle bacilli in a few glomeruli in the kidney, where they caused little or no reaction in the tissue about them. Weigert, as early as 1877, pointed out the important relation between tuberculous lesions of the vascular system and general miliary tuberculosis. Following his papers a very large literature has grown up on the subject. All manner of tuberculous vascular conditions have been carefully studied and described. These have included lesions of the thoracic duct, pulmonary and systemic veins, large and small arteries, and even of the heart itself. Commonest of all are the lesions of the veins