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Elements of astronomy .. (1870)

Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 149

An illustration from Elements of astronomy .., 1870, leaf 149
he beginning of December theyappear as straight lines. They then gradually assumemore and more of an oval shape, being most curvedabout the first of March. From this time their curvaturediminishes, until the last of May or the first of June, whenthe appear again as straight lines. They pass through… … INCLINATION OF THE SUNS EQUATOR TO THEECLIPTIC. 138 SOLAR SYSTEM. the same changes for the next six months, with this differ-ence, that the curves are noiv in a direction opposite tothat which they took for the six preceding months. 249. By observing the changes in the paths of thespots with great…

Astronomy

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