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Bible Encyclopedias
Hadley, John

The Nuttall Encyclopedia

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Natural philosopher; invented a 5 ft. reflecting telescope, and a quadrant which bears his name, though the honour of the invention has been assigned to others, Newton included (1682-1744).

Bibliography Information
Wood, James, ed. Entry for 'Hadley, John'. The Nuttall Encyclopedia. https://www.studylight.org/​encyclopedias/​eng/​nut/​h/hadley-john.html. Frederick Warne & Co Ltd. London. 1900.
 
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