File:Gregory's pillar - geograph.org.uk - 114983.jpg
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English: Gregory's pillar. Around 1670, the Regius Professor of Mathematics at St Andrews, James Gregory, had this pillar erected on a hill about a mile south of the University library. There he had his telescope and a very early example of a pendulum clock. He lined his telescope up with the pillar and in 1674 he cooperated with colleagues in Paris to make simultaneous observations of an eclipse of the moon and was able to work out the longitude for the first time. |
| Date | |
| Source | From geograph.org.uk |
| Author | James Allan |
| Attribution (required by the license) | James Allan / Gregory's pillar / |
| Object location |  | View this and other nearby images on: OpenStreetMap |  |
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by James Allan and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: James Allan
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 10:06, 31 January 2010 | | 320 × 640 (107 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Gregory's pillar. Around 1670, the Regius Professor of Mathematics at St Andrews, James Gregory, had this pillar erected on a hill about a mile south of the University library. There he had his tele |
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