Abstract
I HAVE long been dissatisfied with the rules commonly given in order to enable the relation between the direction of a current and that assumed by a magnet in its neighbourhood to be readily brought to mind. It is a small matter, but it causes a great deal of worry to many a student. The vagaries of Ampère's swimmer are “past the wit of man.” Prof. Jameson's rule is not bad, but is not really easy to remember; the corkscrew is good, provided that you have a little time to think about it; but I have felt all along that it ought to be possible to devise something simpler than any of these. May I suggest that the following may perhaps be found useful?
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DANIELL, A. A Substitute for Ampère's Swimmer. Nature 48, 294 (1893). https://doi.org/10.1038/048294b0
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DOI: https://doi.org/10.1038/048294b0
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