Abstract
CHARACTER FIGURES OF SOLAS PHENOMENA.—The first number of a Bulletin for Character Figures of Solar Phenomena has just been issued from Zurich under the auspices of the International Astronomical Union. It was resolved at the Leyden meeting of the I.A.U. to publish a quarterly bulletin of solar data, so that investigators might, with as little delay as possible, be provided with daily index figures of solar activity, much in the same way that the De Bilt figures furnish magnetic data.
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Our Astronomical Column. Nature 122, 974 (1928). https://doi.org/10.1038/122974a0
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DOI: https://doi.org/10.1038/122974a0