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4- Current periodicals may be consulted only in the Reading 
Room and are not to be taken from the room. 
5. Any book or periodical drawn from the General Library 
for Departmental Libraries, and required for immediate reference, 
will be sent for upon application to the Librarian, and temporarily 
returned to the General Library. 
6. A set of encyclopedias, dictionaries and other general 
works of reference will be permanently retained in the General 
Library. 
7. Any defacement of books is prohibited, and all losses or 
injuries shall be promptly adjusted to the satisfaction of the 
Librarian. 
HALL 28. 
THE READING ROOM. 
Here will be found the reading tables, which are supplied 
with current magazines and periodicals pertaining more particu- 
larly to scientific, technical and kindred subjects. 
HALL 34. 
THE LECTURE HALL. 
This is reserved for all public meetings, lectures, etc., held in 
the Museum. Courses of lectures on scientific and technical sub- 
jects are here given on Saturday afternoons of the winter and 
spring by specialists acquainted with the results of the latest 
research. These lectures are usually illustrated with stereopticon 
views. 
The lectures thus far given and announced are: 
FIRST LECTURE COURSE. 
Dec. 15— “A Trip to Greenland.” 
Prof. T. C. Chamberlin. Head Professor of Geology, Uni- 
versity of Chicago. 
Dec. 22 — “ Movements of the Earth’s Surface.” 
Prof. R. D. Salisbury. Professor of Geographic Geol- 
ogy, University of Chicago. 
