New York City became the medical capital of the world early in June when the first advance guard of physicians began to register at the various hotels for attendance on a number of meetings of special societies which usually are held just before the annual session of the American Medical Association. With each day more and more physicians, accompanied frequently by members of their families, poured into the city. By Friday June 14, 12,864 physicians had registered their attendance on the annual session, exceeding by more than 2,500 the largest number ever previously registered in any session. The largest previously was the Atlantic City session at which the Canadian physicians also were in attendance. Physicians filled the lobbies of the hotels, thronged the scientific exhibits, were interviewed by one exhibitor after another in the Technical Exhibits, collected vast amounts of information and samples, applauded the Governor and the Mayor of New York at the opening session, participated iji innumerable social events, theater parties and radio broadcasts, and found time for an occasional hour at the World's Fair. Replete with information and entertainment and somewhat exhausted by the drive necessary to get the most out of a meeting of this kind, they began to depart toward the end of the week, expressing universal satisfaction in what they had gained at the meeting.