John Hadley

1682 - 1744

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John Hadley was an English instrument maker who improved the Gregorian reflecting telescope and invented the quadrant for navigation.
Full MacTutor biography [Version for printing]

List of References (7 books/articles)

A Poster of John Hadley

Mathematicians born in the same country

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Honours awarded to John Hadley
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Fellow of the Royal Society1717
Lunar featuresRima Hadley

Other Web sites
  1. Encyclopaedia Britannica
  2. Google books

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JOC/EFR February 2005

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