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Treatment of Ores.

Description: Patent for the treatment of ores which has a improvised process of chloridizing ores, concentrates, and other metallurgical products.
Date: April 19, 1921
Creator: Hirt, Jules Hector
Partner: UNT Libraries Government Documents Department

Filtering Material.

Description: Patent for "improved filtering stuff composition" (lines 8-9), containing vegetable ashes and an insoluble binding agent for the purpose of purifying liquids.
Date: April 19, 1921
Creator: Müller, Enrique
Partner: UNT Libraries Government Documents Department
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