The question of prevention of T. B. must be dealt with, first, upon educational grounds,—to educate the public and the individual to the point where we can more or less limit the spread of the infection; secondly, and perhaps more important,—by a campaign for the improved living conditions of our people in general, especially in childhood. As a matter of fact, when you get right down to it, T.B. is a social disease; it is a social problem even more than it is a medical problem. We know that when the good Lord made us, he put into us a certain amount of quality which, for lack of a better term, we have called natural resistance. If we can keep that natural resistance at a high point,—build it up,—the infection, though it may strike us, will not produce the clinical disease, T.B. In the second place, we come to the actual treatment of the sick. This, too, is largely a hygienic measure. Since time immemorial, those interested in T.B. have been searching, have been praying for a specific cure. Every now and then somebody bobs up with a story of how he is going to cure T.B. overnight by this or that injection, treatment, etc. In each of these cases there is a grain of fundamental truth. We have got to put these things together; and when we get down to the final conclusion we can not get away from the fact that the treatment of T.B. is the building up, the bringing back to normal, and in fact if you can, the reaction to the point beyond the normal, of that quality I spoke of, natural resistance. In order to accomplish this, I believe one of the most important points lies in the word, morale; and to encourage your morale, it is wise to get your classes classified, and to get your T.B. patients working together in classes in sufficiently large numbers so that you get that inspiration that comes from what my friend used to speak of as “the psychology of the crowd.” The thing the soldiers know as the touch of the elbow; there is a certain magic in it. It is easier to get farther when you know that somebody besides yourself is going through the same thing. I think we men in charge of hospitals feel that. That is one of the inspirations that comes to me from meeting with such a crowd of my fellows here. Away off there in the swamps of Louisiana there comes a sort of feeling, “We are here alone; it is hopeless”. When we are all here together exchanging experiences, there comes the inspiration, “We are not alone”. In your general hospitals you have T.B. beds; have them in sections by themselves,—not because you are afraid of the spreading of the disease, not because the T.B. patient is an outcast,—but because you can do more successful work for the patient, not by segregation, but by classes.