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Dry Ore-Concentrator

Description: Patent for improvements specifically for ore concentrators. Illustrations and instructions included.
Date: October 23, 1883
Creator: Vollmer, John George
Partner: UNT Libraries Government Documents Department

Refrigerating Apparatus.

Description: Patent for an economic and durable refrigerating apparatus that cools food by "reducing the temperature of the air in a partially closed chamber by the evaporation of water brought about through the medium of capillary attraction, and likewise to provide for automatically maintaining a predetermined level of water in the water chamber of the apparatus, and a thorough ventilation of the refrigerating chamber thereof" (lines 16-24).
Date: October 23, 1894
Creator: Carleton, Ernest William & Odell, James Madison
Partner: UNT Libraries Government Documents Department

Churn-Dasher

Description: Patent for an improved churn dasher "to thoroughly agitate the cream at the center of the churn-body and also around the bottom of the walls thereof" (lines 13-15) and "also to cause tangential streams or currents at the bottom of the churn, so as to thoroughly agitate all of the cream and effectively intermingle the air therewith" (lines 18-22), including illustrations.
Date: October 23, 1900
Creator: Franklin, Edward R.
Partner: UNT Libraries Government Documents Department
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