Abstract
IN a letter to NATURE of April 13 (vol. lxxxvi., p. 213) I gave reasons for the view that at least some of the forms of aurora borealis are caused by a type of rays which, as regards absorption by matter, follow the same law as α rays from radio-active substances. In the letter I also mentioned that the diurnal distribution of aurora apparently would require a negative charge of the rays.
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VEGARD, L. On the α-Ray Theory of Aurora Borealis. Nature 87, 213–214 (1911). https://doi.org/10.1038/087213e0
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DOI: https://doi.org/10.1038/087213e0
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