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 273
e thread be so twisted as that, by itsuntwisting, with the globe suspended by it, it shallcause the globe to turn from west to east, while it isheld against the circular wire, the experimenter willsee light and shade, or what is the same thing, dayand night, succeed each other upon the different… … its axis, let it be carried, by the thread, along thecurved wire, which represents its annual orbit, its cen-tre being always kept on the same level as the wire,and the candle, which, in that case, will always beperpendicular to the equator, will enlighten the globefrom pole to pole, and each part…
Astronomy
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