Abstract
A PAIR of sensitive Pirani gauges, set up in this laboratory for another purpose, was found to be remarkably sensitive to small magnetic fields. It seemed worth while to give a report of the phenomenon, which may be of interest to those working in the field of thermomagnetic effects. The gauges consist each of a thin nickel strip, 12 cm. long and 0·003 mm. by 0·05 mm. in cross-section. They are mounted parallel and about 2 cm. apart in a high vacuum, and are connected in two of the arms of a Wheatstone bridge, the other two arms being fixed resistances.
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References
L. E. Knott, Trans. Roy. Soc. Edinburgh, 41, 39; 1903. ibid., 45, 547; 1907.
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McMILLAN, E. A Magnetic Effect on Pirani Gauges using Nickel Wires. Nature 133, 831–832 (1934). https://doi.org/10.1038/133831b0
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DOI: https://doi.org/10.1038/133831b0
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