Abstract
SUN-SPOTS.—During the past week a large group of sun-spots has been visible on the solar disc. First seen on the eastern limb on December 12, the group was nearly central on December 17, its length being about one-tenth of the solar diameter; on the latter date a second, smaller group appeared in the N.W. quadrant.
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Our Astronomical Column . Nature 90, 443–444 (1912). https://doi.org/10.1038/090443a0
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DOI: https://doi.org/10.1038/090443a0