A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1853)
Mattison, Hiram, 1811-1868 · New York, F. J. Huntingdon [etc.] · leaf 238
erver 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 owner, in making the obser-vations and discoveries which have immortalized his name, and which have so… … LORD ROSSES GREAT REFLECTING TELESCOPE. 537. This is the largest reflecting telescope ever con-structed. The speculum, composed of copper and tin,weighed three tons as it came from the mould, and lostabout ith of an inch in grinding. It is 5J inches thick,and 6 feet in diameter. It was cast on the…
Astronomy
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