Approximately eighty percent of the Library's collection is shelved across five floors of open stacks. Access to all floors is provided by an elevator in the center of each floor and, to the Second, Third and Fourth Floors, by stairs on the west side of the Library. Closed-stack materials include rare and valuable items, designated by the location "Treasure," and superseded editions of Anglo-American primary and secondary materials located in "Cellar Storage." These materials are available upon request at the Circulation Desk.
