Abstract
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Observing Astronomical Society.—Observations to July 31.—Solar Phenomena.—Mr. T. W. Backhouse, of Sunderland, observed a large spot in the sun's south hemisphere from the 12th to the 22nd of July. He obtained the following measures of its dimensions:—
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Societies and Academies . Nature 4, 359–360 (1871). https://doi.org/10.1038/004359b0
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DOI: https://doi.org/10.1038/004359b0