Abstract
I BEG to direct Prof. Piazzi Smyth's attention to an article in the Annuaire du Bureau des Longitudes for 1878 by M. Faye, entitled “La Météorologie Cosmique,” in which this distinguished astronomer and meteorologist says:—La période des taches, portée à IIans. I par M. Wolf n'étant pas égale à celle des variations magnétiques (10aus. 45), ces deux phénomènes n'ont aucun rapport entre eux.” It thus appears rather premature to suppose that the sun-spot cycle and the terrestrial magnetic diurnal oscillation cycle are intimately connected.
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DOWNING, A. Sun-spots and Terrestrial Magnetism. Nature 17, 242 (1878). https://doi.org/10.1038/017242d0
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DOI: https://doi.org/10.1038/017242d0
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