ays; 1 to 5 p. m. Sundays.

[Illustration]

=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.

[Illustration: FRONT DOOR]

=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.

[Illustration: 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.