John Hadley Personality Type, MBTI
What is the personality type of John Hadley? Which MBTI personality type best fits? Personality type for John Hadley from Engineers & Inventors and what is the personality traits.
ISFJ (XwX)
John Hadley personality type is ISFJ. And their enneagram is XwX.
To learn more about ISFJ and its traits click here.
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.
In 1730 Hadley invented the reflecting octant, which could be used to measure the altitude of the sun or other celestial objects above the horizon at sea. A mobile arm carrying a mirror and pivoting on a graduated arc provides a reflected image of the celestial body overlapping the image of the horizon, which is observed directly. If the position of the object on the sky and the time of the observation are known, it is easy for the user to calculate his own latitude. The octant proved extremely valuable for navigation and displaced the use of other instruments such as the Davis quadrant. An American, Thomas Godfrey, independently invented the octant at approximately the same time.
