...A tool designed to simplify calculations such as multiplication and division, as well as squares, cubes, and trigonometric functions. The original slide rule was invented in 1620 by the Englishman Edmund Gunter (1581-1626) using a logarithmic scale. It was later improved by William Oughtred (1574-1660) and others, and the first slide rule with a cursor in its current form was made by the Frenchman Amédée Mannheim (1831-1906) around 1850. It consists of two rulers, a fixed platform rule and a sliding ruler that can be moved parallel to it, both of which have the same scale markings. By sliding one of them to align the scales, it is possible to add or subtract logarithmic values and calculate the product or quotient of two numbers. ... *Some of the terminology that mentions "Mannheim, A." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…乗除算をはじめとし,平方,立方,三角関数などの計算を簡便にできるようにくふうされた器具。1620年,イギリスのガンターEdmund Gunter(1581‐1626)の考案した対数目盛を応用したものが計算尺の原型で,その後オートレッドWilliam Oughtred(1574‐1660)らによって改良が加えられ,カーソルがついた現在の形の計算尺は,1850年ころフランスのマネームAmédée Mannheim(1831‐1906)のものが最初である。固定された台尺とこれに平行に動かせる滑尺と呼ばれる2種類のものさしからなり,どちらにも同じ尺度の目盛が刻まれていて,一方を滑らせ目盛を合わせることにより,対数の値の加減を求めて2数の積と商を計算することができる。… ※「Mannheim,A.」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
…In 1919, he founded the Primate Laboratory at Ya...
The former name of the Central African Republic, ...
It was discovered in 1973 by joint exploration by ...
Italian painter and mosaicist active in the late 1...
A meritorious official who founded the Ming Dynas...
Year of death: 25th February 860 (21st March 860) ...
… [Toshio Hamatani]. … From [Ilex] … [Toshio Hama...
A commercial transaction. (New English-Japanese Di...
...This clown, wearing a white conical hat and lo...
〘Noun〙 A festival at Oharano Shrine in Nishikyo Wa...
Period Overview The Heian period refers to the 40...
…Also called angiotonin or hypertensin. A polypep...
Born: December 30, 1865 in Bombay [Died] January 1...
A perennial plant of the Rosaceae family that grow...
Abbreviation for vinyl compound. Also called viny...