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Talc Mining in New York
Report issued by the U.S. Bureau of Mines on the talc deposits in New York state. The report includes details on the geology of the deposits, and the mining and milling of the talc. This report contains illustrations.
Date:
October 1920
Creator:
Ladoo, Raymond B.
System:
The UNT Digital Library
Notes on Specifications for French Airplane Competitions
Given here are the rules officially adopted by the Aeronautical Commission of the Aero Club of France for a flight competition to be held in France in 1920 at the Villacoublay Aerodrome. The prize will be awarded to the pilot who succeeds in obtaining the highest maximum and lowest minimum speeds, and in landing within the shortest distance.
Date:
October 1920
Creator:
Margoulis, W.
System:
The UNT Digital Library
Tests of the Daimler D-IVa Engine at a High Altitude Test Bench
Reports of tests of a Daimler IVa engine at the test-bench at Friedrichshafen, show that the decrease of power of that engine, at high altitudes, was established, and that the manner of its working when air is supplied at a certain pressure was explained. These tests were preparatory to the installation of compressors in giant aircraft for the purpose of maintaining constant power at high altitudes.
Date:
October 1920
Creator:
Noack, W. G.
System:
The UNT Digital Library
Recovery of Gold from Black Sand Tailings
Report on the recovery of gold from black sand tailings, based on tests conducted at the U.S. Bureau of Mines' Alaska Station.
Date:
October 1920
Creator:
Gross, John
System:
The UNT Digital Library