Identifier: highschoolastro00matt (find matches)
Title: A high-school astronomy: in which the descriptive, physical, and practical are combined ..
Year: 1859 (1850s)
Authors: Mattison, Hiram, 1811-1868
Subjects: Astronomy
Publisher: New York, Mason brothers
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ason-work, the top of which may be seen in the cut; and in the hands of its present owner,Lewis M. Rutherford, Esq., has already rendered very efficient service. 5j . ., r. Rutherfords telescope? ? By whom made? DIFFERENT KINDS OF TELESCi^PES. GREAT REFRACTING TELESCOPE AT CINCINNATI, OHIO. 524. The above cut represents one of the most imj <3rt-ant telescopes in the United States. It is located in theobservatory on Mount Adams, near Cincinnati, Onio,and has been for several years under the direction ofProf. 0. M. Mitchel, by whose instrumentality it waspurchased and mounted. The object-glass is about 12 inches in diameter, with a focal distance of 17 feet. Itwas purchased in Munich, Germany, in 1844, at an expense of nearly ten thousand dol-<ars. There is but one larger than this in the United States, and but two larger in theworld. 524. Cincinnati refractor—where located ? By whom purchased ? (Where?When ? Cost ? Size and focal distance ? Comparati ve size ?) ■228 ASTRONOMY
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Tllii GliKAT CliAIG TKLKSCOIE, WANDSWORTH COMMON, NEAR LONDON. 525. This is the largest refracting telescope ever constructed. The object-glass is two feet in diameter, witha focal distance of 76 feet. The tube is of heavy sheetiron, and shaped somewhat like a cigar. It is 13 feet incircumference in the largest place, and weighs aboutthree tons. This telescope is suspended from a brick tower 65 feet high, 15 feet in diameter, andweighing 220 tons. The top of the tower, from which the telescope is suspended, re-volves ; and by a chain running over pulleys, and a weight and windlass, it is balanced,and raised or lowered. The lower end rests on a small carriage, that runs upon a circn-.ar railroad around the tower, at the distance of 52 feet from its center. By thesemeans it is directed to almost any point in the heavens. It is called the Craig tele-scope, in honor of Kev. Mr. Craig, under whose direction, and at whose expense, it wasconstructed. It is located at Wandsworth Common, near

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