![File:Hadley's reflecting quadrant.png](http://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Hadley%27s_reflecting_quadrant.png/773px-Hadley%27s_reflecting_quadrant.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:00, 25 September 2007 | ![]() | 1,800 × 1,397 (83 KB) | Michael Daly~commonswiki | {{Information |Description=Drawing of John Hadley's Reflecting Quadrant |Source=Hadley, “Hadley’s Octant.” Philosophical Transactions of the Royal Society, vol. 37, p. 147, 1731. |Date=1731 |Author=John Hadley |Permission= |other_versions= }} |
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