Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 242
ccording to the varying distance of the sunand moon from the earth. The diameter of the umbra atthe surface of the earth is seldom more than a hundred ASTRONOMY. 219 miles: hence the belt of a total eclipse is, on the average,not more than a hundred miles wide; and a total eclipseseldom lasts more… … Fig. 241. track of the umbra of the moons shadow over the earthin the total eclipse of i860. Fig. 242 shows the track of the total eclipse of 1871across India and the adjacent seas. In a partial eclipse of the sun, more or less of one sideof the suns disk is usually concealed, as shown in Fig.…
Astronomy
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