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John Machin
(1680–1751)
English mathematician and professor of astronomy at Gresham College. He was secretary of the Royal Society from 1718 to 1747.
John Machin

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Works by this author published before January 1, 1924 are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.