Mattison, Hiram, 1811-1868 · New York, Huntington and Savage, Mason and Law · leaf 20
* Ho-Rl-ZON. PEIMAEY ASTEONOMY. 13 … 2. In this cut the shad- convexity of the earths shadow. ow of different objects isexhibited. At A the ob-ject is of a cubical form,and casts a shadow ac-cordingly upon the moonat the right. At B the ob-ject is triangular or pris-matic, and the shadow istriangular; but the shad-ow of the earth, as…
Astronomy
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