Abstract
DR. JANSSEN has just made a communication to the French Academy of Sciences, which will be received with interest, not only by students of solar physics, but by all who follow the various triumphs achieved by modern scientific methods. It seems a paradox that discoveries can be made depending on the appearance of the sun's surface by observations in which the eye applied to the telescope is powerless; but this is the statement made by Dr. Janssen himself, and there is little doubt that he has proved his point.
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LOCKYER, J. The Sun's Photosphere . Nature 17, 22–24 (1877). https://doi.org/10.1038/017022a0
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DOI: https://doi.org/10.1038/017022a0