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Updated: May 4, 2025
It is important, however, to avoid sudden heating and cooling of the joints, as this tends to destroy them. Clammond, Gulcher, and others have constructed useful thermo-piles for practical purposes. The metals forming these pairs are an alloy of bismuth and antimony for one and iron for the other. Prisms of the alloy are cast on strips of iron to form the junctions.
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