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Forty-first annual report of the Director of the United States Geological Survey
George Otis Smith
1920, Annual Report 41
The appropriations for the public work under the United States Geological Survey for the fiscal year 1919-20 comprised items amounting to $1,586,353.50.   In general the results of the varied activities of the Geological Survey may be regarded as meeting with a constantly increasing measure of public approval, as shown by the...
The use of the two-circle contact goniometer in teaching crystallography
Florence Bascom
1920, American Mineralogist (5) 45-50
The two-circle contact goniometer was devised to supplement the two-circle reflecting goniometer, by furnishing a means for the measurement of medium-sized crystals not provided with sufficiently good reflecting faces for the successful use of the latter instrument. The contact goniometer has however proved itself adapted, in a greater degree even...
Note on brannerite
R. C. Wells
1920, Journal of the Franklin Institute (189) 779-780
No abstract available....
Geology of northeastern Montana
Arthur J. Collier
1919, Professional Paper 120-B
A large region in northeastern Montana has never been thoroughly explored by geologists, owing to the fact that it is a part of the Great Plains and the belief that it is too monotonous and uninteresting to tempt anyone to turn aside from the pronounced geologic features a little farther...