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John Hadley
(1682-1744)
English mathematician
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John Hadley (16 April 1682 – 14 February 1744) was an English mathematician, and laid claim to the invention of the octant, two years after Thomas Godfrey claimed the same.

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Born
16 April 1682
Bloomsbury, London
Died
14 February 1744 (aged 61)
East Barnet, Hertfordshire
Zodiac Aries
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