The geography of the heavens, and class-book of astronomy: (1858)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 195
ed onedegree towards the pole star,till at length, as he crossed theequator, the North star wouldsink below the horizon, andbecome invisible. Whence wederive the general rule, thatthe altitude of one pole, or thedepression of the other, at anyplace on the Eartlis surface, is equal to the latitude…
Constellations · Stars
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