Plate 2. … Sun, as seen with the nnked THE SUN, eye, through smoked glass. on March 18th., 1858, site, wing a reniai-kable spot on its surface. mm* 1 4 so. I* 17. ! - i .0 ♦ iiiii '* V SSSISSSS 4i fl n is . ^ * /JO • * «t<> \ U. 20 .J SOLAR SPOTS, OBSERVED AT VARIOUS TIMES. 'ig. 1. Spot, observed April 1> to…
Astronomy Observers\ manuals
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