This manuscript page from 1665 shows Newton's dedication to mathematical detail. He was calculating the area under a hyperbola to no less than 55 decimal places by adding values from each term of an infinite series.

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image © Cambridge University Library http://www.lib.cam.ac.uk
by permission of the Syndics of Cambridge University Library

John Faurel, ed., et al. Let Newton Be? A new perspective on his life and works
New York: Oxford University Press, 1988, pg 73
call number: QC16 N7L47 1988

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