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http://www.cosmos.ru/mirrors/stern/earthmag/mill_2.htm.
http://www.cosmos.ru/mirrors/stern/earthmag/mill_2.htm.
1. Discovery of the Sunspot Cycle
... The weather throughout this year was so extremely favorable that I have been able to observe the Sun clearly on 312 days; however, I counted only 34 groups of sunspots.. From my earlier observations, which I have reported every year in this journal, it appears that there is a certain periodicity in the appearance of sunspots and this theory seems more and more probable from the results of this year.. ... Year . ... Days when no . ... Observation Days . ... 273 . ... 282 . ... 244 . ... 149 . ...
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Ссылки http://www.cosmos.ru/mirrors/stern/earthmag/whschwab.htm -- 5.0 Кб -- 22.12.2007
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