. Manual of the natural history, geology and physics of Greenland and the neighbouring regions / prepared for the use of the Arctic expedition of 1875, under the direction of the Arctic Committee of the Royal Society and edited by T. Rupert Jones. Together with Instructions suggested by the Arctic Committee of the Royal Society for the use of the expedition / published by authority of the Lords Commissioners of the Admiralty [microform]. Natural history; Scientific expeditions; Sciences naturelles; Expéditions scientifiques. '!» â "igniTn" - 728 THE AURORA BOREALIS. "ft 4t. pa
. Manual of the natural history, geology and physics of Greenland and the neighbouring regions / prepared for the use of the Arctic expedition of 1875, under the direction of the Arctic Committee of the Royal Society and edited by T. Rupert Jones. Together with Instructions suggested by the Arctic Committee of the Royal Society for the use of the expedition / published by authority of the Lords Commissioners of the Admiralty [microform]. Natural history; Scientific expeditions; Sciences naturelles; Expéditions scientifiques. '!» â "igniTn" - 728 THE AURORA BOREALIS. "ft 4t. patches or coronas of ^vhite light vnih streamers stretching upwards from them. The spectra were observed by Mr. Alvan Clark in America, and in England by Mr. H. R. Procter, who observed a red line in the spectrum. These displays were accompanied by great magnetic disturbances, and by remarkable Earlh-ciirrents both in England and also on the Madras-Bombay lines in India. Another brilliant display was seen at and again at 7 on Dec. 19, 1870, in the Mcditcrranr'an, on the east coast of Sicily. Towards the north, north-cast, and brilliant pink streamers shot up out of a bank of faint hazy light on the horizon. The planet Jupiter was clearly seem through some of the most brilliant streamers. The sky became covered with a pinkish- mau>c colour. Toward the Avest a pale, steady white light, the zodiacal light, was clearly seen during the evening. This dis- play was followed in Sicily by a falling barometer and very stormy winds, with thunder and lightning, and by verv destructive storms in Italy, causing the overflow of the Tiber and the flooding of the city of Rome to a depth which had been scaicely ever known.] 16. The Speotkum of the Alroka Borealis. The following account of Professor Angstrom's paper on this subject is taken from " Nature," Vol. 10, No. 24G (for July 16, 1874) :â " It may be assumed that the spectrum of the aurora is com
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