File:PSM V04 D410 Sunspot and protuberance frequency.jpg

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Description Sunspot and protuberance frequency
Date between 1873 and 1874
date QS:P,+1873-00-00T00:00:00Z/8,P1319,+1873-00-00T00:00:00Z/9,P1326,+1874-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 4
Author Unknown authorUnknown author
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current22:43, 28 June 2010Thumbnail for version as of 22:43, 28 June 20101,641 × 1,385 (109 KB)Ineuw (talk | contribs){{Information |Description = Sunspot and protuberance frequency |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_4.djvu/410 |Date = 1873-1874 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} {{GFDL-user-w|e

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