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collection may be consulted from 9 a.m. until 5 p.m. by those inter- 
ested, and specimens submitted will be gladly identified. 
Library 
The rapidly growing library of the Garden comprises at present 
more than 16,000 volumes and more than 12,000 pamphlets. This 
is not a circulating library, but is open free for consultation to al 
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persons daily (except Sundays and holidays) from 9 a.m. until 
5 pm. (Saturdays, 9 to 12). More than 900 periodicals and 
serial publications devoted to botany and closely related subjects 
are regularly received. These include the transactions of scien- 
tific societies from all quarters of the globe, the bulletins, mono- 
graphs, reports and other publications of various departments of 
the United States Government, as well as those of foreign govern- 
ments; of all state agricultural experiment stations and agricul- 
tural colleges; the publications of research laboratories, universi- 
ties, botanic gardens and other scientific institutions of the world, 
as well as the files of independent journals devoted to the various 
phases of plant life. The library is especially rich in publications 
of foreign countries and has a growing collection of incunabula 
and other pre-Linnean works. 
Bibliographical assistance is rendered to readers by members of 
the Library staff. 
Laboratory Building 
The Laboratory Building contains (besides offices of administra- 
tion and the Library and Herbarium mentioned above) four lab- 
oratory rooms, a culture room, three classrooms with stereopticon 
and other equipment for instruction, a room for the installation of 
temporary exhibits, six private research rooms, and an auditorium 
seating about 570 and equipped with motion picture machine, 
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stereopticon and lecture table supplied with water, gas, and elec- 
tric current for lectures involving experimental work. 
Instructional Greenhouses 
A range of three greenhouses, each about 20 x 30 feet, 1s pro- 
vided for the practical instruction of children and adults in plant 
propagation and other subjects. 
