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Trailer.

Description: Patent for improved construction and arrangement of trailers. This improvement will allow an easy turning movement where a number of trailers are connected while admitting of strain between the various trailers when they are turning a corner or going around a curve.
Date: August 20, 1918
Creator: Watkins, Leigh
Partner: UNT Libraries Government Documents Department

Extracting Metals from Ores

Description: Patent for the extraction of metals from ores by developing an improvement to the cynid process.
Date: August 20, 1918
Creator: Biesel, C.
Partner: UNT Libraries Government Documents Department

Continuous Vacuum Dehydrator.

Description: Patent for improvements in speed, cheapness, and more efficiency in continuous-vacuum dehydration and filtering for the purpose of extracting valuable ores with water including instructions and illustrations.
Date: August 20, 1918
Creator: Biesel, Charles
Partner: UNT Libraries Government Documents Department
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