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Production. Tin smelting. "Bars" of pure tin are trimmed and cleaned before removal from the molds in which they were formed in a Southern smelter. All the trimmings are returned to the "pot boilers" for remelting. The plant, finest and most modern in the world, extracts the pure metal from South American ore. Sourced from the Library of Congress.

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Production. Tin smelting. "Bars" of pure tin are trimmed and cleaned before removal from the molds in which they were formed in a Southern smelter. All the trimmings are returned to the "pot boilers" for remelting. The plant, finest and most modern in the world, extracts the pure metal from South American ore. Sourced from the Library of Congress.

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