Slide rule

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1630: William Oughtred (1574-1660), English mathematician and Anglican clergyman, invented the Slide Rule. 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 also introduced the 'x' symbol for multiplication. John Napier, Jewellery Tools, Slide Rule, Ancient Books, Multiplication And Division, Old Jewelry, Scales, Ruler, Division

1630: William Oughtred (1574-1660), English mathematician and Anglican clergyman, invented the Slide Rule. 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 also introduced the 'x' symbol for multiplication.

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