Curiosities of the sky, a popular presentation of the great riddles and mysteries of astronomy (1909)
Serviss, Garrett Putman, 1851-1929 · New York, London, Harper & brothers · leaf 171
fextraordinary excitement when the lights are play-ing in the sky, only added to the mystery of thephenomenon until its electro-magnetic nature hadbeen established. This became evident as soon asit was known that the focus of the displays was themagnetic pole; and when the far South was visitedthe… … MARVELS OF THE AURORA the auroral lights, whatever their precise cause mightbe, were manifestations of the magnetic activity of ourplanet. After the invention of magnetic telegraphyit was found that whenever a great Aurora occurredthe telegraph lines were interrupted in their opera-tion, and the…
Astronomy
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