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Tapping antimonial slag from a furnace

"The slag overflows into the second kettle; the lead settings in the first kettle with a small curst of matte on top. The hood can be seen at the top of the picture, too high up to be of any real use." (Source: Hamilton A. Lead poisoning in the smelting and refining of lead. Industrial Accidents and Hygiene Series No. 4. Bulletin of the U.S. Bureau of Labor Statistics 1914a;141:1-97. Public domain.)

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