The geography of the heavens and classbook of astronomy; (1863)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, Whitall, Henry, 1819-1887? Celestial planisphere. [from old catalog] · New York, Mason brothers; Boston, Mason & Hamlin; [etc., etc.] · leaf 327
observe, another to work the tube, and a third to note down the observa-tions. A speaking tube runs from the observer to the house where the assistants are atwork. By this telescope, the sixth and seventh satellites of Saturn were discovered;and it was the chief instrument used by its distinguished… … ?09. This is the largest reflecting telescope ever constructed.The speculum, composed of copper and tin, weighed three tons asit came from the mould, and lost about -Jth of an inch in grinding.It is 5|- inches thick, and 6 feet in diameter. It was cast onthe 13th of April, 1842, and was cooled…
Constellations · Stars
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