Includes minutes of meetings and agenda of the Executive Council, 1934-1973; records of annual meetings of the House of Delegates, 1931-1971; minutes of meetings of Trustees, 1941-1965; President's files, mostly correspondence of Norman S. Moore, 1960-1961; membership records, 1945-1959; publications, including New York Journal of Medicine, 1910-1972, Transactions of the Medical Society of the State of New York, 1807-1903, The Reflex, 1966-1967, newsletters, journals, and other printed records; subject files; committee files; records of conventions; tape recordings; biographical sketches; photographs; records of the medical societies of Erie County (1801-1951) and Kings County (1822-1972); a "Safeguard Your Health" series of 8 reels of movie film and three phonograph records; and newspaper clippings collected by the society's Public Relations Department.