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LANTERN SLIDES 
Sets of lantern slides are being assembled for loan to educational 
institutions and lecturers with the object of stimulating interest in natural 
history. A nucleus of sets has been established and includes the following 
series: Indians and Eskimos, dinosaurs, topographic forms, petroleum, fish, 
and water birds. The collection will be added to gradually and when 
present plans materialize sets of lantern slides will be available to represent 
adequately, and illustrate, Canadian fauna and flora, the Indians and 
Eskimos of Canada, the geography of Canada, and the natural sciences. 
Special sets of lantern slides are arranged for use in the automatic 
balopticon installed in the rotunda of the Museum. This projector has 
already proved its usefulness as an educative medium. 
STILL PHOTOGRAPHS 
A large collection of photographic negatives has been accumulated 
by the National Museum and the Geological Survey, Canada, with which 
the Museum has been closely associated over a period of more than seventy 
years. Prints, enlargements, and lantern slides are made from these nega- 
tives and are sent at cost price to schools and universities requiring these 
visual aids in teaching. 
Each year many requests are received from authors, journalists, and 
publishers for photographs to illustrate special articles. The National 
Museum welcomes such requests and aims to assist writers and publishers 
in every possible way. 
LOAN OF SPECIMENS 
Specimens of birds, small mammals, Indian clothing, and implements 
are available for loan to teachers, but up to the present very few loans 
have been made outside of Ottawa. This service has developed on account 
of the demand from teachers in local schools for this assistance and very 
little expense is involved either to the Museum or the teachers. The 
teachers call at the Museum for the specimens and return them within a 
time limit. 
MINERAL AND ROCK COLLECTIONS 
Three grades of collections of minerals and rocks are prepared by the 
Geological Survey for sale to educational institutions. The prices of these 
collections and full information about them may be obtained on application 
to the Director of the Bureau of Economic Geology. 
A table indicating the number of collections sold in the past year is 
included in the report of the Chief of the Mineralogical Division. 
LOAN COLLECTIONS 
Four collections of museum specimens have been prepared for loan to 
museums, educational institutions, and other responsible organizations. The 
subjects are of a popular nature and the material selected is interesting and 
