Abstract
SOLAR OBSERVATIONS AT ROME.—In the Memorie degli Spettroscopisti Italiani for March, Prof Tacchini communicates the solar observations made at the Royal College. These observations refer to the 4th trimestre of 1892, and are given here somewhat in detail. Taking prominences first, the numbers show a great falling off when compared with the preceding three months; thus for the northern and southern hemispheres the frequency of these phenomena for the three months was 81, 78, 61 for the former (sum 220) and 105, 138, 90, for the latter (sum 333) the foregoing trimestre giving 431 and 493 for each hemisphere. The greatest frequencies took place in latitudes + 60 + 70 N. and - 30° - 40° S., but the numbers indicate really two other maxima for each hemisphere, and they lie in the zones + 30° + 20° and 50° - 60°.
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Our Astronomical Column. Nature 47, 565–566 (1893). https://doi.org/10.1038/047565a0
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DOI: https://doi.org/10.1038/047565a0