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Title: Gregorian reflecting telescope of 2 1/2 inch aperture and 18 [Go to resource]
Description: Gregorian reflecting telescope of 2 1/2 inch aperture and 18 inch focal length by Benjamin Martin, London, on an altazimuth stand with a folding claw foot tripod and oak case. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: telescope - Gregorian
telescope - reflectingTemporal: 1738-1777 Source: Science Museum Creator: Martin, Benjamin Identifier: 1919-326 Go to resource More Like this...
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