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 invented 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 division. He is credited with inventing the slide rule in about 1622.[5] He also introduced the "×" symbol for multiplication and the abbreviations "sin" and "cos" for the sine and cosine functions.[6]
^Smith, David Eugene (1923). History of Mathematics. Vol. 1. Dover Publications. p. 392. ISBN 9780486204291.
^'Oughtred (William)', in P. Bayle, translated and revised by J.P. Bernard, T. Birch and J. Lockman, A General Dictionary, Historical and Critical, (James Bettenham, for G. Strachan and J. Clarke, London 1734/1739), Vol. VIII, pp. 77-86 (Google).
^F. Willmoth, 'Oughtred, William (bap. 1575, d. 1660)', Oxford Dictionary of National Biography (2004).
^Mullinger, James Bass (1895). "Oughtred, William" . Dictionary of National Biography. Vol. 42. pp. 356–358.
^Smith, David E. (1958). History of Mathematics. Courier Corporation. p. 205. ISBN 9780486204307.
^Florian Cajori (1919). A History of Mathematics. Macmillan. p. 157. cajori william-oughtred multiplication.
material on Oughtred. Account of Oughtred by John Aubrey WilliamOughtred's "Key of the Mathematics" (John Salusbury's English translation of Oughtred's "Clavis...
Bernard Oughtred (1880–1949), English rugby union player Elizabeth Oughtred (1518–1568), English baroness, wife of Anthony Ughtred Evelyne Oughtred Buchanan...
1622, WilliamOughtred of Cambridge combined two handheld Gunter rules to make a device that is recognizably the modern slide rule. Oughtred became involved...
Logarithmorum Canonis Descriptio. This appendix has been attributed to WilliamOughtred, who used the same symbol in his 1631 algebra text, Clavis Mathematicae...
Getaldić Johannes Kepler Guidobaldo del Monte John Napier Pedro Nunes WilliamOughtred Luca Pacioli Robert Recorde Niccolò Fontana Tartaglia Ludovico Ariosto...
per arcminute). In 1633, WilliamOughtred suggested 349,800 feet to a degree (5830 feet per arcminute). Both Gunter and Oughtred put forward the notion...
Danes. In 1638 WilliamOughtred wrote a letter to Allen asking him to make the earliest known Oughtred slide rule, and indicating that Oughtred himself had...
π for the Archimedes constant (proposed by William Jones, based on an earlier notation of WilliamOughtred). Since then many new notations have been introduced...
double scale, logarithmic on one side, tabular on the other. In 1630, WilliamOughtred of Cambridge invented a circular slide rule, and in 1632 combined two...
Volcanic eruption of Mount Vesuvius for the only time this century. WilliamOughtred publishes Clavis Mathematicae, introducing the multiplication sign...
Cornwell was born in London in 1944. His father was Canadian airman WilliamOughtred and his mother was Englishwoman Dorothy Cornwell, a member of the Women's...
Katakana ナ na and メme. The multiplication sign (×), often attributed to WilliamOughtred (who first used it in an appendix to the 1618 edition of John Napier's...
This calculating aid was a predecessor of the slide rule. It was WilliamOughtred who first used two such scales sliding by one another to perform direct...
the target area had vanished. 1630–1632: The slide rule invented by WilliamOughtred (1574–1660), developing on work by Edmund Gunter (1581–1626) and Edmund...
example, Oughtred, William (1648). Clavis Mathematicæ [The key to mathematics] (in Latin). London: Thomas Harper. p. 69. (English translation: Oughtred, William...
aluminium Elisha Otis (1811–1861), U.S. – safety system for elevators WilliamOughtred (1575–1660), UK – slide rule Arogyaswami Paulraj (born 1944), India/U...
Geometry", which had been written by Oughtred earlier in life. The original edition brought the autodidactic Oughtred acclaim amongst mathematicians, but...
slide rule was invented around 1620–1630 by the English clergyman WilliamOughtred, shortly after the publication of the concept of the logarithm. It...
scale, Gunter's rule, was invented shortly after Napier's invention. WilliamOughtred enhanced it to create the slide rule—a pair of logarithmic scales movable...
was finally able to indulge his mathematical interests, mastering WilliamOughtred's Clavis Mathematicae in a few weeks in 1647. He soon began to write...
Parliament, claimed as the inspiration for Malvolio in Twelfth Night. WilliamOughtred (1575–1660), mathematician Robert Devereux, 3rd Earl of Essex (1591–1646)...
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