Abstract
ON Saturday last at Penruddock station, between Penrith and Keswick, about one o'clock, I observed a solar halo which at first was not perfect, but showed a reddish tint in the arc below the sun. Afterwards the circle became complete and continued so with small intervals until about half-past four, when I went indoors. At five o'clock the halo had disappeared in the haze. The day was thick, so hazy indeed that I could hardly distinguish the outline of Saddleback from Penruddock. The colour disappeared when the circle was complete, but occasionally I thought I could distinguish a reddish tinge on the inner side of he arc. I had no means of accurately measuring the radius, but with two pieces of stick which I picked up I estimated the angent at 4/9, which would give nearly 24°. This is more than your correspondent Mr. Gledhill found in his observations, but my measurement is confessedly rough.
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HEELIS, J. Solar Halo. Nature 13, 512 (1876). https://doi.org/10.1038/013512a0
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DOI: https://doi.org/10.1038/013512a0
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