The organization of the work of the new Health Department tuberculosis nurses has been based upon the district system in force among the Associated Clinics. In each clinic district a staff of Health Department nurses is maintained, charged with the sanitary supervision of cases of pulmonary tuberculosis in that district. They visit at least once a month all "at home" cases; that is, cases not regularly attending clinics, not in an institution, or not under a private physician's care. These nurses report daily at the tuberculosis clinic, which is used as a district headquarters, and there receive assignments. One nurse is detailed as Captain, or supervising nurse of the district, and acts as official intermediary between the clinic and the Department of Health. Each morning the nurse telephones to the Department of Health the daily report of her staff and of the clinic, and obtains information received at the Department regarding cases in the district. In case of death or removal of tuberculous patients from a home the district nurses order disinfection of the premises and bedding; they make arrangements for admission of patients to hospitals or sanatoria, investigate complaints made by citizens, see that regulations of the Department of Health regarding expectoration are observed, and use their authority to induce delinquent cases to resume attendance at the proper clinic. They also visit families of patients in hospitals at intervals. Each nurse keeps a complete index of all cases of pulmonary tuberculosis in her district, which is at all times accessible to nurses and physicians at the clinic. In the Department of Health clinics, the plan is as follows: a supervising nurse who does no district work, and several field nurses, each assigned to special duties on clinic days, such as registration room, throat room, examining rooms, etc. Field nurses are also responsible for the care of patients in their sub-districts, each nurse carrying an average of about 125 patients on her visiting list at one time. BOSTON A staff of twenty-five nurses, working from the Out-patient Department of the Boston Consumptives' Hospital, has the supervision of all tuberculosis cases in their homes, and the follow-up work on all discharged sanatorium and hospital cases in the city of Boston. All cases of tuberculosis reported to the Health Department, whether under the care of a private physician or not, are visited at least once by a nurse from this staff, to see that they are carrying out a proper plan of isolation.