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Combined Disk Harrow and Land-Roller

Description: Patent for a vehicle that may be used as either a harrow or a roller. Illustrations included.
Date: May 19, 1908
Creator: Jackson, Lewis Livingston
Partner: UNT Libraries Government Documents Department

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