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Improvement in Construction of Jails.

Description: Patent for improvement in construction of jails; in which a system of flues in between layers of a double floor provide ventilation through grates in the walls and upper layer of the floor, without compromising security.
Date: October 19, 1875
Creator: Seeber, John A. & Croxton, James C.
Partner: UNT Libraries Government Documents Department

Improvement in Sulky-Plows.

Description: Patent for an improvement on sulky-plows which allows it to be adjusted for different uses.
Date: August 28, 1877
Creator: Renfro, Roberson A.
Partner: UNT Libraries Government Documents Department

Improvements in Traction-Engines.

Description: Patent for improving traction engines for use in hauling on farms and farm roads. Includes instructions and illustrations.
Date: October 14, 1879
Creator: McGregor, Montague M. & Croxton, James C.
Partner: UNT Libraries Government Documents Department
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