Abstract
ALTHOUGH the Edison effect was discovered some twenty years before the thermionic valve was patented, it is perhaps not generally known that the rectification of a current by an electric valve had taken place as early as 1863.
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References
Riess, P., Phil. Mag., 27, 313 (1864); Monats. Berl. Akad. (Nov. 1863).
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McNEILL, D. An Early Electric Valve. Nature 175, 732 (1955). https://doi.org/10.1038/175732a0
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DOI: https://doi.org/10.1038/175732a0
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