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The Cretaceous Area North of the Colorado River

Description: Geologic map of a portion of South Texas, showing Cretaceous rocks divided into two sequences - lower Cretaceous series and upper Cretaceous series. Shows also Tertiary and Paleozoic rocks. The map also includes county lines, cities and towns, roads, railroads, bodies of water, and areas of elevation. Relief shown by contours and spot heights.
Date: unknown
Creator: Taff, J. A.; Leverett, S. & Dumble, Edwin Theodore
Partner: Hardin-Simmons University Library

Railway-Switch

Description: Patent for a triple rail railway switch with improved opening and closing mechanisms.
Date: June 4, 1912
Creator: Phinney, Grover Cleveland
Partner: UNT Libraries Government Documents Department

Rail-Joint.

Description: Patent for a rail joint, which will be brought closer together when more weight is put on it.
Date: March 31, 1908
Creator: Bailey, John P. H.
Partner: UNT Libraries Government Documents Department
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