Astronomy for schools; upon the basis of Mons. Arago's lectures at the Royal observatory of Paris .. (1841)
Arago, F. (François), 1786-1853, Haskins, Roswell William, [from old catalog] ed · New York, Robinson, Pratt & co.; · leaf 232
,the sun has been eclipsed at all the points between aand b. But it is also evident, according to the figure,that the sun was not totally eclipsed except for a verysmall part of the earth at a time, because it is onlythe extremity of the shadow which reaches the earth.In this diagram the diameter… … M TC US «0 l- 69 can only happen at the syzygies. The synodicalrevolution of the nodes embraces the period of346d 14h 52ra 16s; being, to the synodical revolution ofthe moon, very nearly in the proportion of 223 to 19. 230 ECLIPSES OP THE SUN. After a period of 223 lunations, then, the sun andmoon…
Astronomy
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