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Improvement in Rotary Subsoil-Plows.

Description: Patent for an improvement upon subsoil plows, using a series of spades arranged upon the same pulleyed rotary shaft, combined with furrow-opening plows.
Date: March 28, 1871
Creator: Morris, Joseph R.
Partner: UNT Libraries Government Documents Department

Improvement in Fire-Tongs

Description: Patent for a part to prevent the legs of fire-tongs from lapping or crossing each other.
Date: January 17, 1871
Creator: George, Alfred M.
Partner: UNT Libraries Government Documents Department

Improvement in Furnaces for Producing Hydrogen and Treating Ores

Description: Patent for an improvement on heating furnaces, having an external water tank and steam tank and an orifice for the admission of steam from the water chamber.
Date: March 28, 1871
Creator: Morris, Joseph R.
Partner: UNT Libraries Government Documents Department
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