Abstract
THERE was a very fine display of aurora here on the night of the 21st. It commenced to be visible about 9.30 P.M., reached its maximum about 11, and faded suddenly away about 11.30. In appearance it was of a silvery white, without a trace of that rose colour which characterised the three great displays of last autumn. The main portion of the light was in the north-western quarter of the heavens, and it was sufficiently strong to see large print by. Extending from the north-west and reaching the north-eastern horizon arose three luminous arches concentric with each other, the 1st about 15° altitude, the 2nd about 25° altitude, and the 3rd about 40° altitude. These were connected by radial tongues of light which were ever changing their height. There was another marked and isolated nucleus about and around a Lyræ.
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LINDSAY The Aurora . Nature 4, 347 (1871). https://doi.org/10.1038/004347a0
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DOI: https://doi.org/10.1038/004347a0