The reduction in the incidence of pulmonary tuberculosis among chronic psychotic cases has been one of the most striking indications of the improvement in conditions of institutional care during the present century. Provided that he is sufficiently co-operative, the patient who enters a mental hospital with an active lesion has generally at least as good a prospect of recovery as the patient who attends a general hospital or dispensary for a lesion of similar severity. For even if the nature of his mental disturbance may sometimes be such as to make his attitude to the illness unsatisfactory, he is often relieved of that fear of economic stress and feeling of obligation to his dependents to return to work as soon as possible, which so often prejudices recovery in the patient of sound mind.