Lord Rosse's Reflecting Telescope
by Universal History Archive/uig
Title
Lord Rosse's Reflecting Telescope
Artist
Universal History Archive/uig
Medium
Photograph - Photograph
Description
Lord Rosse's great 72-inch (1.828m) diameter reflecting telescope of 1845, called the Leviathan of Parsonstown. Mounted between two brick walls, it could move only in a north-south direction. The Earth's rotation provided movement in an east-west direction. From his paper 'On the Construction of Specula of Six-feet Aperture' in Philosophical Transactions of the Royal Society (London, 1849). William Parsons, 3rd Earl of Rosse (1800-1867).
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August 2nd, 2016
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