Exhibition Room. Directly opposite the main entrance is the Exhibition Room, finished in white Vermont marble. The ceiling is supported by twenty-four columns of green veined white marble. The ceiling itself is elaborately and beautifully carved in oak. This room is devoted to exhibitions of rare books, manuscripts and prints. The exhibitions are changed from time to time, usually as often as three or four times a year. Open 9 a. m. to 6 p. m. on week days; 1 to 5 p. m. Sundays.
Current Periodicals Room. The corridor to the south from the main entrance leads to the Current Periodicals Room (Room Number 111). Here about 4,500 current periodicals are on file. A hundred of these are on open racks. The others may be obtained upon application at the desk. A classified finding list gives the reader the titles of periodicals kept here. As this room is sometimes confused in the public mind with a popular or club reading room, it should be remembered that this is one department in a building primarily devoted to the reference work of the Library. The few restrictions which are imposed are only for the purpose of keeping the files intact for binding. The Branches of The New York Public Library contain reading rooms where all the periodicals are on open racks.
Business Offices. Following the corridor leading south and then turning to the right along the 40th Street side of the building, one reaches some of the business offices of the Library—the office of the Bursar (No. 104), of the Building Superintendent (No. 103), of the Chief of the Circulation Department (No. 102), and of the Supervisor of work with children (No. 105). These offices are open for any persons who have occasion to visit them for business reasons, but they are of no interest to sightseers. In Room 100, devoted mainly to the cataloguing work of the Circulation Department, there is a card catalogue of all the books in this Department,—that is, in the Branches of the Library. The Room is open to the public, for the consultation of this catalogue, on week days from 9 a. m. to 5 p. m.
FRONT DOOR
BASE OF FLAGPOLE
Technology Division. Following the corridor leading to the north from the main entrance, there is, on the right, the room of the Technology Division (No. 115), devoted to applied science and engineering. The collection of books in this Division, or under its control, numbers about 65,000. In this room, as in all the special reading rooms, with a few exceptions, books are on open shelves for the free access of readers and students.
Patents Room (No. 121). At the end of the corridor parallel to 42nd Street, is the Patents Room, a part of the Technology Division. It is open from 9 a. m. to 6 p. m. on week days, and is closed on Sundays. Patents may be consulted evenings and Sundays by arrangement with the technology librarian, Room 115.