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Airplane performance, past and present
Report discussing the progress of airplane performance and measured by speed.
Date:
December 1922
Creator:
Warner, Edward P.
System:
The UNT Digital Library
Coal-Washing Investigations: Methods and Tests
From Introduction: "The investigations described in this bulletin are confined to a study of the washing characteristics of bituminous coals. The washing characteristics of coals from many of the most important coal-producing fields of the Eastern and Central States were examined."
Date:
1929
Creator:
Yancey, H. F. & Fraser, Thomas
System:
The UNT Digital Library