MUSEUM NEWS NOTES 75 
about 4000 specimens of 800 species. The series is fully repre- 
sentative of the land molluscan fauna of Japan, and while the 
specimens are not strikingly beautiful, they are of high scientific 
interest. 
A LARGE proportion of the radium exhibit gotten together 
for the St. Louis Exposition by the United States Geological 
Survey has been presented to the Museum and has been tem- 
porarily installed in the Hall of North American Mammals (No. 
206). The exhibit consists of minerals containing uranium, 
polonium, radium, actinium and other radio-active minerals; 
compounds and apparatus illustrating the various steps in the 
process of manufacture, and photographs and literature bearing 
upon radio-activity. The principal source of radium is pitch- 
blende from Joachimsthal, Bohemia, but it has also been derived 
from carnotite, a Colorado mineral, and it occurs widespread in 
minute quantities. This exhibit attracted great attention at 
the exposition and is the object of much study by visitors to the 
Museum. 
ANOTHER of the exhibits from the St. Louis Exposition which 
have been received at the Museum is the material that was sent 
out by the New York City schools. This exhibit has been 
temporarily arranged in the East Hall of the second floor (No. 
207) and has been visited by thousands of school children and 
their parents. 
A MODEL representing a village of the Koryak tribe of eastern 
Siberia has been completed by the Department of Ethnology 
and placed on exhibition in the West Hall of the ground floor, 
The model represents not only the half-underground houses with 
their strange hopper-shaped superstructures, but also the in- 
dustries of the people and the preparation of their store of food 
for the long winter. The season represented in the group is the 
autumn. 
THROUGH the courtesy of the Oregon Historical Society of 
Portland, the Museum has had the opportunity of studying, 
photographing and making casts of an important series of 
