Abstract
RECENT SOLAR ACTIVITY.—Reference was made in NATURE of July 21 to the recent increase of sunspots. Another big spot has since made its appearance, and this with two others may be included in a list of naked-eye spots observed this year.
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Our Astronomical Column. Nature 122, 142 (1928). https://doi.org/10.1038/122142a0
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DOI: https://doi.org/10.1038/122142a0