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File:40 foot telescope 120 cm 48 inch reflecting telescope William Herschel.png

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Description
English: An illustration from the 1797 edition Encyclopaedia Britannica Volume 18 of William Herschel's 120 cm (48-inch) reflecting telescope with a 12 m (40 foot) long focal length, also called his "40-foot telescope". The telescope was constructed between 1785 and 1789 at Observatory House in Slough, England and was the largest in the world for 50 years. It was dismantled in 1840.
Date
Source 1797 edition Encyclopaedia Britannica Volume 18 "telescope"
Author Andrew Bell and Colin Macfarquhar

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10 March 2012

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Date/TimeThumbnailDimensionsUserComment
current02:34, 11 March 2012Thumbnail for version as of 02:34, 11 March 20122,113 × 2,477 (5.9 MB)Fountains of Bryn MawrSlight exposure fix
02:02, 11 March 2012Thumbnail for version as of 02:02, 11 March 20122,113 × 2,477 (5.9 MB)Fountains of Bryn Mawr

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