Sun-Spot

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Jul 1871

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1871natur...4..224p&link_type=abstract

Nature, Volume 4, Issue 90, pp. 224 (1871).

Physics

Scientific paper

WHILE watching the sun set over the hills to the west of Halifax, on the evening of July 17, my attention was called to an intensely black spot upon its southern hemisphere, almost vertically below the centre of the disc, which was visible to the naked eye. I may add that the evening was fine, but a thin mist was rising from the valleys, and that it was about five minutes before the sun touched the horizon that the spot was first seen.

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