The Orr collection is located in the Rare Book Rooms on the Library's 8th floor.
This is the private collection of H. Winnett Orr, M.D., which was given to the library on permanent loan from the American College of Surgeons in 1977. The collection consists primarily of surgery, military medicine, and wound and injury materials, most of which were published prior to 1900. The collection spans to 1956, the year of Dr. Orr's death, including 468 items Dr. Orr considered classics. All items in the collection are arranged according to the Catalogue of the H. Winnett Orr Historical Collection. These items are searchable in the library catalog, with call numbers such as 'ORR COLL no. 1 (through no. 2289)'.