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- Craig_telescope abstract "The Craig telescope was the largest refracting telescope (a telescope with a lens) in the world from 1852 to 1857, erected near London, England. It was a great refractor, a large refracting telescope with an achromatic doublet with an aperture of 61 cm (2 feet (24 inches)) and that was completed in 1852 in Wandsworth Common and dismantled around 1857 (although the brick tower probably survived until 1870). Its namesake, the Rev. John Craig, spent a small fortune to produce a uniquely designed telescope with nearly double the aperture of the next largest refracting telescopes, making it the largest refracting telescope in the World for the better part of a decade. However, it had problem with its lens figuring starting from its first light in the summer of 1852. It soon fell into disuse as that same year Craig lost his only son, then his wife in 1854, and lost his brother and was put in jail for 6 weeks in 1856.Craig did not have the lens re-figured and the telescope struggled to achieve his modest goals, which included observations of Earth's Moon and Saturn. It was eventually demolished and Craig moved on to other projects, including opening one of the first indoor skating rinks.The doublet was made with flint glass by Chance Brothers and a plate glass by Thames Plate Glass Company. The mounting was designed by William Gravatt, and featured a 19.5 meter tall brick tower with a 24.5 m long cigar shaped telescope tube (built by Messrs Rennie) slung from the side.The next largest refractors were two 15 inch (38 cm) refractors built by Merz and Mahler of Münich (Joseph Fraunhofer's firm), one at Pulkovo Observatory in Europe and one at Harvard College Observatory in America. The largest telescope at the time was in Ireland, a 6 foot (183 cm) aperture metal mirror by William Parsons, 3rd Earl of Rosse. (see "Leviathan of Parsonstown")".
- Craig_telescope wikiPageExternalLink craig.
- Craig_telescope wikiPageExternalLink index.html.
- Craig_telescope wikiPageExternalLink hl=en&q=%22Craig%20telescope%22&um=1&ie=UTF-8&tbo=u&tbs=bks:1&source=og&sa=N&tab=wp&fp=7db4f7af4a13aa89.
- Craig_telescope wikiPageID "28669607".
- Craig_telescope wikiPageRevisionID "525872512".
- Craig_telescope built "1852".
- Craig_telescope diameter "2.0".
- Craig_telescope firstLight "1852".
- Craig_telescope focalLength "76".
- Craig_telescope hasPhotoCollection Craig_telescope.
- Craig_telescope location "Wandsworth Common, London,".
- Craig_telescope mounting "Gravatt alt/azimuth".
- Craig_telescope name "Craig telescope".
- Craig_telescope style "Achromatic Refractor".
- Craig_telescope wavelength Visible_spectrum.
- Craig_telescope subject Category:Telescopes.
- Craig_telescope type Artifact100021939.
- Craig_telescope type Device103183080.
- Craig_telescope type Instrument103574816.
- Craig_telescope type Instrumentality103575240.
- Craig_telescope type Magnifier103709206.
- Craig_telescope type Object100002684.
- Craig_telescope type PhysicalEntity100001930.
- Craig_telescope type ScientificInstrument104147495.
- Craig_telescope type Telescope104403638.
- Craig_telescope type Telescopes.
- Craig_telescope type Whole100003553.
- Craig_telescope comment "The Craig telescope was the largest refracting telescope (a telescope with a lens) in the world from 1852 to 1857, erected near London, England. It was a great refractor, a large refracting telescope with an achromatic doublet with an aperture of 61 cm (2 feet (24 inches)) and that was completed in 1852 in Wandsworth Common and dismantled around 1857 (although the brick tower probably survived until 1870). Its namesake, the Rev.".
- Craig_telescope label "Craig telescope".
- Craig_telescope sameAs m.0czbxj3.
- Craig_telescope sameAs Q5181632.
- Craig_telescope sameAs Q5181632.
- Craig_telescope sameAs Craig_telescope.
- Craig_telescope wasDerivedFrom Craig_telescope?oldid=525872512.
- Craig_telescope isPrimaryTopicOf Craig_telescope.