Petrus Nonius

Japanese: Petrus Nonius(英語表記)PetrusNonius
Petrus Nonius

...It is a supplementary scale that divides the graduations of the main scale into smaller units to improve reading accuracy. The vernier graduation method was invented in 1542 by Portuguese mathematician Petrus Nonius (1492-1577), and in 1631, the Frenchman Pierre Vernier (1580-1637) developed a structure that allowed accurate reading (the English pronunciation of Bernier is Vernier). The most commonly used ordinary vernier is one in which the ( n -1) graduations of the main scale are divided into n equal parts. ...

*Some of the terminology that mentions "Petrus Nonius" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…本尺の目盛をさらに細分して読取精度をよくする補助目盛である。バーニヤの目盛方法は1542年ポルトガルの数学者ノニウスPetrus Nonius(1492‐1577)が発明し,これを1631年に正確に読取りのできる構造にしたのがフランスのベルニエPierre Vernier(1580‐1637)である(ベルニエの英語読みはバーニアー)。もっとも一般的に使用されている普通バーニヤは本尺の(n-1)目盛をn等分したものである。…

※「Petrus Nonius」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

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