File:Quarter of circle of Jonathan Sisson-MGR Lyon-IMG 9912.JPG

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Description Quarter of a circle, by Jonathan Sisson. Brass, 1742. Classified as a Historic Monument. Lent by University Claude-Bernard Lyon 1 (Observatoire astronomique de Saint-Genis-Laval). Used by Jérôme de Lalande to measure the distance between the earth and the moon in 1751. On display at Lyon.
Date Taken on 19 April 2011, 12:08 (according to Exif data)
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Author Rama
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Attribution: Photograph by Rama, Wikimedia Commons, Cc-by-sa-2.0-fr
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current19:08, 16 June 2011Thumbnail for version as of 19:08, 16 June 20113,767 × 3,767 (468 KB)Rama (talk | contribs)== {{int:filedesc}} == {{Information |Description={{LangSwitch |en=Quarter of a circle, by Jonathan Sisson. Brass, 1742. Classified as a Historic Monument. Lent by University Claude-Bernard Lyon 1 (Observatoire astronomique de Saint-Genis-Laval). Used by

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