=Supervision Outside the Home.= Whenever the infectious case is at large in the community, his whereabouts should be known to those most exposed to the danger. This applies alike to employer and employee. The head of the department in which the consumptive is at work should see that those in contact with him know of his condition. The patient should be compelled to use his sputum cup when he expectorates. Knowledge of the patient’s condition does not necessarily mean that he should be dismissed—it should merely mean that he will be held up to the required standard of carefulness. For example: the Baltimore Health Department received a letter from a certain firm in the city, stating that many cases of tuberculosis had developed among the employees on a certain floor in their factory—and on this one floor alone. This led them to suspect that a consumptive might be among these workers, distributing the disease. A list of all the employees was submitted. Investigation promptly showed that on this particular floor was a chronic case of tuberculosis of long standing, a man who had been under supervision at home for several years. In his home, this patient was exceedingly clean and punctilious in the use of the sputum cup; at his work, however, he was absolutely the reverse. On receipt of this information, the employer had a sound talk with this man, which resulted in the use of the sputum cup and all other precautions. The patient did not lose his place, but he was no longer permitted to jeopardize the health of his fellow-workers. Patients with chronic tuberculosis are also found in domestic service, and go in and out of private homes, carrying infection with them. This danger is especially great in the South, where there is a large negro population, and we constantly find consumptives employed as cooks, housemaids, nursemaids, and butlers, as the case may be. For the most part, the employers are entirely ignorant as to their condition. In these cases, just as in the factory, office, department store, and so forth, the employer should be notified of the presence of tuberculosis.