John Hadley

For other people named John Hadley, see John Hadley (disambiguation).

John Hadley
Born(1682-04-16)16 April 1682
Bloomsbury, London
Died14 February 1744(1744-02-14) (aged 61)
East Barnet, Hertfordshire
Known forOctant

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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