Another proof that human tuberculosis is much more widely disseminated than was heretofore believed is furnished us by a diagnostic method devised by the French clinician André Jousset, namely “inoscopy.” By means of inoscopy we can examine microscopically, for tubercle bacilli, coagulable inflammatory exudates and the blood of suspected cases of tuberculosis, even though only very few bacilli are distributed in large amounts of fluid. And we examine these fluids directly, not indirectly by means of cultures. As a result of the coagulation the bacilli are fixed by the fibrin, from which they are freed by dissolving the fibrin with an appropriate digesting fluid.[3] The bacilli are then separated by centrifuge and can be examined directly in microscopical preparations. With the aid of this very valuable diagnostic method we are enabled to demonstrate the tubercular origin of almost all serous pleurisies, of many exudative peritonites, of accumulations of fluid in the peritoneal cavity of alcoholic individuals with liver cirrhosis, of joint inflammations, of exudative meningites, of many cases of heart-disease and of other classes of symptomatic affections, where formerly most physicians did not think of the possibility of these affections being tubercular. I cannot fail to express my conviction of the general diffusion of tuberculosis in densely crowded populations, and of the consequent futility of all attempts to suppress the disease by means of isolation and segregation. What would be the outcome if we were to adopt the suggestion seriously put forth, to send all the tubercularly infected soldiers to hospitals, later discharging them as unfit for service? We should not have more than 5% left for active service, and even this small number would probably after the lapse of a few years be declared tuberculous. At the most I can assent only to the separation of the coughing consumptive from the apparently healthy individual; and these should be sent, not to sanitaria [Heilstätten], but to homestead colonies [Heimstätten] such as we formerly maintained for lepers.