=Nurse’s Cases.= A large proportion of her cases will be unearthed by the nurse herself. In Baltimore, the nurses themselves discover nearly thirty-three per cent. of the cases under supervision. Thus, on being sent to see a certain patient, before her visit is over the nurse may discover one or two others of the family whose condition is such as to call for immediate examination. The nurse should look with suspicion upon every member of a household which has been exposed to tuberculosis. The prolonged and intimate contact which is necessary for the transmission of this disease has unfortunately, in most families, existed for months before her arrival. The nurse should be particularly keen in questioning the parents of tuberculous children since it is from the parents that most children contract this disease. =Physicians.= In considering the various sources from which patients are recruited, we have purposely left until the last that which most people would have deemed the first and most important source of all, namely, the physicians of a community. While the medical profession has blazed the way, and has indicated the paths along which the work must be carried on, it is unfortunately only the greater men in the profession who have done this. The others, through ignorance, through indifference, or through that spirit which according to Dr. Cabot makes medicine “the greatest profession, the meanest of trades,” have succeeded in placing effective if temporary barriers in the path of the anti-tuberculosis worker. The rigid adherence to the old Hippocratic oath, by which the physician was sworn to keep inviolate the confidence of his patient, and to place foremost the welfare of the individual, has for the most part been very nobly lived up to. This oath, however, antedates our knowledge concerning infectious and communicable disease. With the knowledge as to the nature of transmissible diseases, there has come a change in medical ethics, a change manifested by laws in which the welfare of the community is placed above that of the individual. We see this reflected in the regulations governing diphtheria, smallpox, scarlet fever, and so forth—diseases which are distinctly the concern of the community, as well as of the patient himself. But with tuberculosis, which has but recently become recognized as a communicable disease, we find a halting reluctance to consider anything but the rights of the individual. This feeling is particularly strong among physicians of an older generation, hold-overs from a passing régime. To such as these the nurse is nothing less than an impertinence. Even if physicians of this sort are unable to see their patients oftener than once or twice a year, or know them to be in need of supplies which the nurse will gladly furnish, they refuse to call upon her, and consider her advent as intolerable.