Patent Model - Sponge for Reducing Gold and Silver and Other Ores

Maker and role
Abraham Hay, Patentee
Production date
Mar 12 1889
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Object detail

17 x 14 x 2 1/2" (43.2 x 35.6 x 6.4cm)
The object of Hay's invention was "to provide a flux or semi-metallic sponge to be used in the reduction of various ores belonging to the gold and silver groups. For the greatest economy, the sponge should vary in composition according to the proportions of the negatives - that is to say, the salts or oxides of the metals in the ore to be operated upon." (Patent Number 399,527)
Object number
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