DISCUSSION ON THE SEVERAL PAPERS ON TUBERCULOSIS.

DR. DENNISON OF DENVER, COLO. —We are indebted to Dr. McFarland and Dr. Rochester for their excellent papers read this morning, and I wish particularly to commend Dr. McFarland for his excellent statement of what tuberculosis is. I have no controversy with those gentlemen as to their treatment or the results of their experiments. I object to Dr. Cohen's warning against seeking after a specific for tuberculosis as if it were a will-o'-the-wisp. I commend the work of Prof. Klebs, Dr. von Ruck, Dr. Trudeau, and those men who are in search of a specific for tuberculosis. Their work is to be commended because it is painstaking, and for the hard lines which they are following. In the first place it seems to me impossible that we can prove anything by testing tuberculin on healthy persons, for tuberculin can only affect individuals previously infected with tuberculosis. The assertion of one