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William Oughtred (5 March 1574 – 30 June 1660), [1] also Owtred, Uhtred, etc., was an English mathematician and Anglican clergyman. [2] [3] [4] After John Napier discovered logarithms and Edmund Gunter created the logarithmic scales (lines, or rules) upon which slide rules are based, Oughtred was the first to use two such scales sliding by one another to perform direct multiplication and ...
Clavis mathematicae (English: The Key of Mathematics) is a mathematics book written by William Oughtred, originally published in 1631 in Latin.It was an attempt to communicate the contemporary mathematical practices, and the European history of mathematics, into a concise and digestible form.
In c. 1622, William Oughtred of Cambridge combined two handheld Gunter rules to make a device that is recognizably the modern slide rule. [15] Oughtred became involved in a vitriolic controversy over priority, with his one-time student Richard Delamain and the prior claims of Wingate. Oughtred's ideas were only made public in publications of ...
Oughtred Society Slide Rule Reference Manual (PDF). Oughtred Society. Archived (PDF) from the original on 26 April 2021. Harris, Charles Overton (1972). Slide Rule Simplified. Chicago: American Technical Society. ISBN 978-0-8269-2342-4. Young, Neville W. (1972). A Complete Slide Rule Manual. David M. Peterson. Archived from the original on 25 ...
In 1630, William Oughtred of Cambridge invented a circular slide rule, and in 1632 combined two handheld Gunter rules to make a device that is recognizably the modern slide rule. Like his contemporary at Cambridge, Isaac Newton, Oughtred taught his ideas privately to his students.
In 1631 Oughtred introduced the multiplication sign (×), his proportionality sign (∷), and abbreviations 'sin' and 'cos' for the sine and cosine functions. [57] Albert Girard also used the abbreviations 'sin', 'cos', and 'tan' for the trigonometric functions in his treatise.
In c. 1622, William Oughtred combined two handheld Gunter rules to make a calculating device that was essentially the first slide rule. [ 9 ] The logarithm function became a staple of mathematical analysis, but printed tables of logarithms gradually diminished in importance in the twentieth century as multiplying mechanical calculators and ...
William Oughtred greatly improved this in 1630 with his circular slide rule. He followed this up with the modern slide rule in 1632, essentially a combination of two Gunter rules , held together with the hands.