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| View Original: | Reflecting telescope, after Isaac Newton, photo-2.JPG (2324x3143) | |||
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| Keywords: Reflecting telescope, after Isaac Newton, photo-2.JPG Reflecting telescope after Isaac Newton by William Herschel slough 1790 Example of Herschel's most popular telescope Octagonal barrel suppoted by aningeniously constructed framework the whole made in mahongany The image is created by a system of metal specula and is seen trhrough the side ocular own 2011-12-23 13 45 16 AlfvanBeem Cc-zero Instruments in the Teylers Museum Culture photographed by Alf van Beem Herschel telescopes | ||||
