Abstract
IT may not be generally known that magnetised needles, like those used in galvanometers and telegraphs, are easily and rapidly demagnetised in the neighbourhood of other magnets, when the fields of the two magnets are not coincident—that is, when their respective lines of force are not in the same direction.
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PREECE, W. The Demagnetisation of Needles. Nature 8, 102 (1873). https://doi.org/10.1038/008102a0
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DOI: https://doi.org/10.1038/008102a0
