Abstract
I FIRST came across this phenomenon in 1917, when it was shown as a “parlour trick ” in an officers' mess in Macedonia. It is obviously of the greatest interest, but I was unable to trace it to its origin.
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BROWN, T. [Letters to Editor]. Nature 108, 529 (1921). https://doi.org/10.1038/108529b0
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DOI: https://doi.org/10.1038/108529b0
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