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The monster telescopes, erected by the Earl of Rosse, Parsonstown, with an account of the manufacture of the specula, and full descriptions of all the machinery. Connected with these instruments (1844)

Parsonstown : Shields · leaf 67

An illustration from The monster telescopes, erected by the Earl of Rosse, Parsonstown, with an account of the manufacture of the specula, and full descriptions of all the machinery. Connected with these instruments, 1844, leaf 67
49° sideration of the method to be adopted a matter of some moment. The plan pursued is this: there are three gal- leries, which, when joined together, make up a segment of the circle which the tube in its motion describes; there- fore, by ce along this, the observer follows the tube from south to… … by wooden beams thirty-two feet long, more than sufficient to reach from wall to wall; on the top and bottom of the side beams is an iron rail for the purpose of allowing them to run easily between the wheels CC; when it is required to move the gallery, the handle H is turned; G

Rosse, William Parsons, Earl of, 1800-1867 · Telescopes

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