The metallurgy exhibit demonstrated how man worked metals from ores. One popular exhibit was a display of silver and gold ores safely stored in a Herring safe. The ores were gathered mostly by agents of the Tenth Census, and represented fully all the districts of the west where the precious metals were mined. Smithsonian Institution Archives, Neg. Number 95-20321	The Herring Safe displaying silver and gold ores, 1886
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