Before describing the direct measures which have been adopted for the control of tuberculosis, it should be added that in no country have these been in operation sufficiently long, and in no country have they been so adequately applied, as to render it practicable to apply statistical measurement of their value; meanwhile these measures must be judged in the light of our knowledge of the pathology of tuberculosis. _Notification of Tuberculosis_ If every tuberculous patient were intelligent, and willing and able to follow the advice given by his doctor, if he consulted his doctor for the first symptoms of illness, if his disease were recognized by the doctor at its earliest recognizable stage, and if the doctor in every instance gave the right advice and made the necessary examinations of all “contacts,” no occasion would arise for the intervention or assistance of Public Health Authorities, except in providing bacteriological facilities and institutional accommodation. In actual fact these conditions are not secured for the majority of patients; and the private practitioner, however willing, is seldom in a position to remedy the domestic and industrial insanitary conditions which favour infection and lower resistance to infection. Hence notification of cases of tuberculosis was advocated for many years by pioneer medical officers of health who secured voluntary notification by doctors of a considerable proportion of the total cases in their districts, and in a few instances secured compulsory notification by local enactment, before any general regulations on the subject were made. It is noteworthy that in this early period a town like Brighton, which had voluntary notification with sanatorium provision for patients willing thus to be treated, secured the notification of a larger proportion of total cases than another town in which notification was compulsory, but no sanatorium accommodation had been provided. The point is mentioned as emphasizing the general principle that compulsory measures in public health, if they are to be successful, require to be associated with full provision for the action which should follow the compulsory enactment; which provision, as in this case, may be a direct inducement to compliance with the enactment. In view of the change of central policy involved and of the unpreparedness of most local authorities to give the assistance needed for notified cases, the general enforcement of notification of tuberculosis was brought about in stages; in 1909 poor-law cases of consumption were made notifiable throughout England and Wales, hospital cases in 1911, consumption in the general community in 1912, and all forms of tuberculosis in 1913.