List, C, Hall, T. G. (Thomas Grainger), 1803-1881 · Philadelphia : Thomas Cowperthwait & Co. and Carey & Hart · leaf 36
1 he has arrived at b, perfectly unconscious of hisown motion, he will look at the sun, s, at rest, andrefer it to a point b, just as if the sun had reallyset out from a, and moved to b, and he had re-mained at rest. Another reason for the motion of the earth roundthe sun is, that the planets… … Thus, suppose s to be the sun; e, f, g, threeplaces of the earth in its path; a, b, c, threeplaces of a planet in its path round the sun, atthe same times. Draw the lines e a a, f b b, g c c. Then when the earth is at e, the planet appearsat a, and when the earth has moved to f and the 32 OUTLINES…
Astronomy
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