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  5. John Hadley

Births on April 16

John Hadley
1682Apr, 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.

References

  • John Hadley
  • Octant (instrument)

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