Abstract
STONYHURST COLLEGE OBSERVATORY.—The Report of this Observatory for 1887, which has been recently published, is of the usual character, giving the results of the magnetic and meteorological observations for the year. The daily areas of the spots observed upon the sun during 1886 and 1887, expressed in miliionths of the sun's visible hemisphere, are also-given in both tabular and graphical form. The latter shows in a very striking manner the remarkable depression in spot-activity which marked the seven months from the end of September 1886 to the end of April 1887, and the regular series of gentle undulations which succeeded it. A note on the “Upper Glows in 1887” records that the white haze round the sun, and the pink “fore” and “after” glows consequent upon the Krakataõ explosion, were still observed occasionally in 1887, but more feebly and less frequently than in 1886.
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Our Astronomical Column . Nature 39, 137–138 (1888). https://doi.org/10.1038/039137a0
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DOI: https://doi.org/10.1038/039137a0