Oatred, W. - Oatred
|
...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. ... From [Mathematical symbols]…In the appendix to the second edition (1618) of J. Napier's English translation of his book on logarithms (translated by E. Wright), x was used as the multiplication symbol. It is said that W. Oughtred (1574-1660) was the first to use × (1631). The symbol × was originally used in a variety of ways. … *Some of the terminology that mentions "Oughtred, W." 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。… 【数学記号】より…J.ネーピアの対数についての本の英訳(訳者はライトE.Wright)の第2版(1618)への付録でxが乗法記号に使われた。×を最初に使ったのはオートレッドW.Oughtred(1574‐1660)であろうといわれている(1631)。記号×はもともといろいろな意味に利用された。… ※「オートレッド，W.」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 |
<<: Dance and rejoice - Dance and rejoice
>>: Sonoluminescence - Otoluminescence
Recommend
Oribitsu - Oribitsu
A square or cubic box made by bending a thin slab...
Stock price index futures trading - Kabukashisuusakimonotorihiki (English name) stock price index futures
Futures trading uses stock price indexes as the u...
Sword bean (katana bean) - Sword bean (English spelling)
A perennial herb of the legume family native to tr...
Hard shower
…The name comes from the fact that the trajectory...
Ramses II
…the third king of the 19th Dynasty of ancient Eg...
Hiranai [town] - Hiranai
A town in Higashitsugaru District, in the north-ce...
Combine - Konbain (English spelling) combine
An agricultural machine that travels over rice fi...
Quiet place - Kanjo
(Also called "kansho" (sweet potato)) 1....
Cnidaria
...The name comes from the fact that the inside o...
Denbo - Denbo
〘Noun〙① Buddhist term. When a master imparts and t...
"Ezo Language Collection" - Ezogoshu
...The editor, Kumajiro Uehara, was an Ezo interp...
Royal Canal
A canal with a total length of about 130 km that c...
Staufen dynasty - Staufen
A medieval German dynasty established by the Stauf...
Gesneriaceae
...It is also used by the general public as a sto...
Conrad Hal Waddington
1905‐75 British biologist. Graduated from Cambridg...