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Improvement in Gang and Sulky Plows.

Description: Patent for improvements in gang and sulky plows which "consists in an axle having the double crank of the transporting-wheel journaled upon the outer bend of said crank, working between the side beams of the plow-frame, and the connecting-rods pivoted, respectively, to the said bars and to the end and inner bend of said crank" (lines 17-23). Includes instructions and illustrations.
Date: January 8, 1878
Creator: McCormick, John Robert
Partner: UNT Libraries Government Documents Department

Improvement in Horse-Powers

Description: Patent for improvement in horse-powers through gravity and tread-power of a farm animal, for use as a power source for farm equipment, with illustration.
Date: August 30, 1878
Creator: Blain, John Harvey
Partner: UNT Libraries Government Documents Department
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