Mathematician:Hadley

Disambiguation

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Hadley may refer to:

John Hadley $($$\text {1682}$ – $\text {1744}$$)$

English mathematician who invented the sextant, independently of Thomas Godfrey.

Constructed the first practical working reflecting telescope.
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John Hadley

Translator of:

• Mar. 1992: Problems to Sharpen the Young (Math. Gazette Vol. 76, no. 475: pp. 102 – 126) (with David Singmaster)  www.jstor.org/stable/3620384

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