By a proper grouping of rooms it may be possible for one attendant to temporarily supervise several rooms.

Stack.

An allowance of 10,000 sq. ft. on each floor will provide accommodation for 1,600,000 volumes.

Separate Building or Sub-Basement.

Heating, ventilating and lighting plant.

Basement.
Janitor’s work room300sq. ft.
Engineer’s room (office)300”
Engineer’s work room400”
Scrub women’s room300”
Store room for supplies1,000”
Bindery5,000”
Printing plant3,000”
Auditorium or Exhibition Room4,500”
14,800sq. ft.
Ground Floor.
Book Order Dept3,000sq. ft.
Supply Dept2,500”
Packing room1,500”
Delivery Station room1,000”
Repair room1,200”
Library for the Blind2,000”
Supt. of Building—office500”
Coat and parcel room600”
Public telephone room} combine {300”
Public reception room300”
Telephone switch board200”
Public toilet rooms700”
Private toilet rooms700”
Lockers for 200 employees600”
Newspaper reading room2,500”
17,600sq. ft.
Main or First Floor.
Children’s room5,000sq. ft.
Delivery room (open shelves)3,000”
Executive offices4,900”
Trustees’ room900sq. ft.
Committee room400”
Librarian’s public office400”
Librarian’s private office500”
Librarian’s Secretary’s office400”
Stenographers’ room600”
Assistant Librarian’s office400”
[400]Supt. of Branches office300”
Finance Department1,000”
Reading rooms—Periodicals4,000”
Reading rooms—Scientific periodicals400”
Reading rooms—Store room for unbound back numbers600”
17,900sq. ft.
Second Floor.
Reference room10,000sq. ft.
Special reference rooms as follows:—
Statistical Dept.800sq. ft.
Patents room2,500”
Map room1,500”
Public documents room for readers1,200”
Restricted and rare books400”
Public catalog1,500”
Public writing and copying rooms800”
18,700sq. ft.
Third Floor.
Music room1,500sq. ft.
Prints room800”
Art book room2,000”
Manuscripts800”
Photographic room400”
Photographic dark room120”
Apprentice class room2,500”
Staff meeting room1,000”
Bell collection1,200”
Study and club rooms (3 or 4)1,200”
Cataloguing Dept.5,000”
Library of Congress Card Catalog room1,000”
Traveling Library Dept. and Interchange600”
18,120sq. ft.
Mezzanine Floor.
Staff sitting room600sq. ft.
Two lunch rooms:—
One400”
One800”
Pantry and kitchen
Public restaurant900”
2,700sq. ft.
Fourth Story (if any).
Janitor’s living rooms1,500sq. ft.
Totals.

Prof. A. D. F. Hamlin has estimated that the available ground space for the building might vary according to different types of building from 31,250 sq. ft. to 44,600 sq. ft. Our estimate of the space required, including rooms, halls, etc, and stack is about 36,630 sq. ft.

(Above basement):—
Ground floor17,600sq. ft.
Main or first floor17,900”
Second floor18,700”
Third floor18,120”
Mezzanine floor2,700”
Fourth floor1,500”
76,520sq. ft.
Stack—4 stories of main building40,000”
116,520”
Add for halls, stairs, walls, vaults, toilet rooms, etc.30,000”
146,520sq. ft.
Average per floor (4)36,630”

ALPHABETICAL ARRANGEMENT OF ROOMS.

Under each room is given the purpose and best arrangement in relation to other rooms. The list also includes such headings as “Furniture,” “Shelving,” etc.

Accession Department, see Cataloguing Department.

Apprentice Class Room. For students who are taking the training course in the library preparatory to admission to the library service. Accommodations should be provided for one hundred students.

Need not be considered in relation to other rooms, and may be placed on top floor or wherever convenient.

The room might be divided into sections by sliding partitions so that a part or the whole could be used either for class work or for entrance and promotion examinations, and should be planned as a regular school class room containing such necessary appliances as desks, chairs blackboards, etc.

A sufficient number of lockers should be provided in a dressing-room near by.

If the room is not divided as mentioned above, a study room containing a working collection of library literature would make study possible by members of one class while another class is in session.