Abstract
THE SOLAR CORONA.—The fourteenth number of the Publications of the Astronomical Society of the Pacific contains several notes on the solar corona. Prof. Charroppin gives the results of an investigation into photographs of the corona, and recommends the following methods in order to obtain greater extension of coronal streamers: (1) to use orthochromatic plates; (2) the greatest precaution to guard from all foreign light; (3) short exposures to obtain the polar filaments and the inner corona;
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Our Astronomical Column. Nature 43, 568–569 (1891). https://doi.org/10.1038/043568a0
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DOI: https://doi.org/10.1038/043568a0