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open access

Airplane performance, past and present

Description: Report discussing the progress of airplane performance and measured by speed.
Date: December 1922
Creator: Warner, Edward P.
Partner: UNT Libraries Government Documents Department
open access

Coal-Washing Investigations: Methods and Tests

Description: 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
Partner: UNT Libraries Government Documents Department
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