Tuesday, February 3, 2009


Underneath the Main Reading Room is the steel stack, in seven decks, containing 334,500 feet, or 63.3 miles, of shelving. It has room for about 2,500,000 books. (The special reading rooms have a shelf capacity for about 500,000 books.) The books in the stack are brought by electric elevators to the Main Reading Room, as they are called for by readers. The stack is not open to readers or visitors.

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