Members of the faculty have free access to the stack. Permits are required of all others. Card for stack permit may be obtained at the Loan Desk by a graduate student and should be filled out and signed by his instructor before being presented to the Associate Librarian for approval. Though undergraduates presenting a reasonable request at the Reference Desk will be given an opportunity to look over the literature of any particular subject, permits for any length of time will only be issued in exceptional cases for, in general, undergraduate needs are met by the Reading Room and Reserved Book collections.

As far as possible books are arranged on the nine floors of the stack in proper classification sequence, but as convenience of access has caused some exceptions, a guide is posted on the central case as one enters the stack on the main floor. More detailed charts will be found on each floor.