Recreations in astronomy : with directions for practical experiments and telescopic work (1879)
Warren, Henry White, 1831-1912 · New York : Harper & Brothers · leaf 173
156 A SOLAR SYSTEM. illumination, we can easily measure the height of moun-tain and depth of crater. An apple, with excavatitand added prominences, revolved on its axis toward the … light of a candle,admirably illustrates the crescent light that fills either side of the cavities and the shadows ofthe mountains on the plain. Xotice in Fig. 58 the cicent forms to the right, showing cavities in abundance.The selenography of one side of the moon is muchbetter known to us than the…
Astronomy
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