The more extensive reports are managed as follows: Once a year, or oftener if necessary, certain institutions send to the Health Department a full list of their discharged patients, whom they wish looked up. The names and addresses are written on separate slips of paper, which contain a printed list of questions to be answered. These are distributed among the nurses of the different districts, each nurse being responsible for the patients in her own territory. Within a week or ten days all the slips are filled in, and a full return made on all cases submitted for investigation. This involves little extra work on the part of the nurses, since in nearly every instance the patients are already under supervision—and if through any oversight they are not, it affords a means of finding them. The superintendents of the various institutions find this a satisfactory way of keeping in touch with their ex-patients, and we think that this work is well within the field of the visiting nurse. Each gains by this co-operation—the Health Department, which wishes to supervise all consumptive patients, and the institution, which wishes accurate data for its reports. In effective social work the keynote of success is reciprocity. =Procuring Patients for the Institution.= In still another way does the nurse serve the institution and that is by procuring patients for it. Large, well organized, and well equipped institutions have little difficulty in filling their beds, but this is often the reverse with those less known and less attractive. It takes much persuasion to induce a sick man to leave his home, and it often takes still more to persuade his family to let him go. To point out the necessity for institutional care, and induce the patient to take advantage of this, is the chief duty of the public health nurse. Only when she does this duty thoroughly and well does the demand for hospital beds exceed the supply. For example: in Baltimore, before the nurses went on duty, the large hospital for advanced cases was never more than half full. The community was not well enough educated to take advantage of it. Since the nurses have been on duty, however, not only has this hospital been filled to capacity, but the capacity itself has been enlarged to nearly double—while a long waiting list is constantly maintained. A small sanatorium was recently opened in Maryland, with a capacity of twenty beds; at the end of five months, it had only five patients. The nurses’ aid was solicited, and within a week it was full. This situation has also occurred in other cities, which found themselves equipped with excellent hospital accommodations, which the patients refused to make use of. Co-operation between the institution and the municipal or visiting nurses would doubtless have promptly remedied this state of affairs. Incidentally we may observe, the better managed and more comfortable the institution, the less difficulty there is in keeping it full.