![](http://www.alamy.com/thumbs/6/CFD58DE0-CA91-4A5B-AAF5-791DA12EB768/D969TT.jpg)
William Herschel's (1738-1822) reflecting telescope with focal length of 40 feet (), showing top of brick foundation and wheeled platform on which the instrument mounted. Slough, England. Engraving 1809.
William Herschel's (1738-1822) reflecting telescope with focal length of 40 feet (), showing top of brick foundation and wheeled platform on which the instrument mounted. Slough, England. Engraving 1809.
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1738-1822, 1809., archival, archive, astronomy, brick, britain, england., engraving, foundation, herschel, historical, history, instrument, mounted., optics, platform, reflecting, science, showing, slough, telescope, top, wheeled, william