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April
16
John Hadley
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1682
Apr, 16
John Hadley
John Hadley, English mathematician, invented the octant (d. 1744)
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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John Hadley
Octant (instrument)
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Events on 1682
27
Oct
Commonwealth of Pennsylvania
Philadelphia is established in the Colonial American Commonwealth of Pennsylvania.