Abstract
Recent Sunspots.—The decline of solar activity noted in NATURE of July 13, p. 69, has been apparent during the last few months. A few rather large spots have, however, been seen—two of them recently—and the details of these are given below.
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Our Astronomical Column. Nature 124, 631 (1929). https://doi.org/10.1038/124631a0
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DOI: https://doi.org/10.1038/124631a0