Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 143
). 190] DISTRIBUTION OF SPOTS. 129 190. Distribution of Spots and Periodicity of Sun Spots. — It is a significant fact that the spots are confined mostly totwo zones of the suns surface between 5° and 40° of north andsouth latitude. A few are found near the equator about thetime of the spot… … Fig. 50. — Distribution of Sun Spots in Latitude. sive series of observations then covering nearly twenty years,showed that the sun spots are probably periodic, being at some-times much more numerous than at others, with a roughly reg-ular recurrence every ten or eleven years. A few years laterhe…
Astronomy · Constellations
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