Natural gaseous mixtures rich in helium
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Article
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1913
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Elsevier Science
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English
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gives an electromotive force of 126 to 128 microvolts. An element consisting of pure bismuth wire and an alloy of Sb, Cd, Bi gave 138 to 14o micro~:olts per degree; but the alloy is too brittle for an ordinary thermopile. The most promising thermopile appears to be one having elements of pure bismut