TUBERCULOSIS EXIIIIUTIOX 9 



in this stupendous fact tliat holds the visiting throngs of whatever station 

 in life to earnest study of alcove after alcove. The exhibition also 

 makes it clear that, in most parts of the world at least, the fight against 

 tuberculosis is well on. At the same time, it suggests even more defi- 

 nitely that the prevention of tuberculosis must be a prevention of infec- 

 tion, and that therefore the manner of the warfare must be segregation. 



It is interesting in this connection to compare tuberculosis and 

 leprosy. Both are caused by l)acilli whose growth produces local tissue 

 changes; both may have a long period of latency; both are protracted 

 in course; both lack evidence of hereditary predisposition. Out of alt 

 expert discussions, this fact remains the final issue: that a complete 

 stamping out of the white plague can never take place, no matter how 

 resistant to tubercle bacilli the populace can be made, except by segrega- 

 tion of advanced cases. This conclusion is reached not only by analogy 

 with diseases like leprosy, nor only by a study of the pathology of the 

 disease, nor only by experimentation with cattle by which extermination 

 of tuberculosis was effected in numerous herds in one generation by 

 segregation, but also by a comparison of the actual experience of various 

 countries. This comparison shows institutional care rather than any con- 

 dition of living or industry, the influence that remains in constant relation 

 to the amount of tuberculosis existing; therefore this institutional care 

 must be the predominant influence. A knowledge of this adds new 

 force to a prominent feature of the exliibit, — models of hospitals and 

 sanatoria, such as those designed for the new buildings to be put up at 

 the Henry Phipps Institute, Philadelphia. The visitor searches for 

 facts, not merely of structure, but likewise of organization and main- 

 tenance of such institutions. How many will be privately endowed ? 

 How many should be erected and supported at the expense of state or 

 nation ? These are questions that must have practical answers in the 

 near future. It is computed that if every consumptive now dying in the 

 state of New York were given hospital care, the number would be about 

 one-half of the insane supported at public expense. 



INIan's infection from bovine tuberculosis is given emphasis in various 

 exhibits, particularly in the pathological work presented by the Bureau 

 of xVnimal Industry of the United States Department of Agriculture,. 

 in the laws of the New York Department of Health with regard to the 

 city's milk supply, in a demonstration of the pasteurization of milk, 

 and in the equipment of a model dairy and model cowshed shown in 



