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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 Apparatus for the Manufacture of Ice.

Description: Patent for a refrigeration apparatus "in which a continuous operation is maintained by means of a current of ether or other volatile fluid which liquefies at a low temperature." (Lines 18-21) Includes instructions and illustrations.
Date: November 28, 1871
Creator: Mühl, A.
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

Improvement in Belt-Fasteners.

Description: Patent for new and useful improvements in Belt-Fasteners. Illustration is included.
Date: November 28, 1871
Creator: Olmsted, Marcellus
Partner: UNT Libraries Government Documents Department
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