THE LIBRARY. 
The Library is designed for reference only. It has many 
valuable scientific works and is primarily for the use of the 
Curators and those desiring to pursue scientific studies. 
The Library contains approximately 55,000 books and pam- 
phlets and is divided into a General and four Departmental 
libraries. Many valuable books relating to the work of the 
Museum are deposited in these libraries. The most notable 
series is — 
The Edward E. Ayer Library of Ornithology, which con- 
tains a set of the original Audubon books and over three hun- 
dred rare and valuable reference works. 
Among others : The Kunz collection of works on minerals, 
gems and semi-precious stones, including several rare editions 
on these subjects. 
The Skiff collection of books of reference and reports on 
minerals, mining and metallurgy. 
The Rothrock Botanical and the Strecker Entomological col- 
lections are among the recent additions. 
RULES OF THE LIBRARY. 
1. The Library is open daily, except Sunday, from 9:00 
A. M. to 4:30 p. M. It is entirely a library of reference. 
2. Books may be obtained by making application to the 
Librarian. 
3. Books or periodicals deposited in the Departmental Libra- 
ries will, in certain cases, upon application, be returned to the 
General Library for the use of an applicant. 
4. Current periodicals can be consulted in the Reading Room 
only. 
5. Curators may have accommodation transfers to their re- 
spective Departmental Libraries. 
6. Any defacement of books and all losses or injuries must 
be promptly adjusted to the satisfaction of the Librarian. 
In the Reading Room will be found the current magazines 
and periodicals pertaining more particularly to scientific, tech- 
nical, and kindred subjects. 
