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Scientific American, Vol. 93, No. 21 (November 1905) (1905)

leaf 9

An illustration from Scientific American, Vol. 93, No. 21 (November 1905), 1905, leaf 9
one- motion of the earth in its orbit, each segment of the On January 28, 11 A. M., a screen image of the sun fourth of the disk apart, both were discernible without spot-zones is in view of the earth thirteen and a half was arranged to measure one foot in diameter and magnifying power. <l;ys, and… … Sunspot of January 16,1905,10:40 A.M. 2. Sunspot of January 30, 190A 11 A. M. 3. Sunspot of February 5,1905, 9:40 A. M the stupendous eruption vis- May; and on the 23d and 4. Sunspot of March 7,1905, 9 A. M. 5. Cyclonic sunspot, April 17, 1905, 9:45 A. M. 6. Sunspot, of July 15, 1905, noon. ible…

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