The Historical Library contains a large and unique collection of rare medical books, medical journals to 1920, pamphlets, prints, and photographs, as well as current works on the history of medicine. The library was founded in 1941 by the donations of the extensive collections of Harvey Cushing, John F. Fulton, and Arnold C. Klebs. Special strengths are the works of Hippocrates, Galen, Vesalius, Boyle, Harvey, and S. Weir Mitchell, and works on anesthesia, and smallpox inoculation and vaccination. The Library owns over 300 medical incunabula.