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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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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Size: 4500px × 3966px
Location:
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