Geissler burette

Japanese: ガイスラービュレット - がいすらーびゅれっと
Geissler burette

...A glass tube with a volumetric scale, with a glass stopcock at the bottom, or a rubber tube with a glass bulb and a thin glass tube with a pinch cock, which can be opened and closed to drain the required amount of liquid inside, and the volume of the liquid drained can be determined accurately from the difference in the readings on the scale before and after. The most typical one is the Geissler burette, with a stopcock, as shown on the left in the figure. When reading the scale, a meniscus (a curved surface caused by surface tension) forms on the liquid surface at the top, so care must be taken when reading the scale, and care must be taken not to drain the liquid too quickly, as a small amount of the liquid that has adhered to the wall of the vessel will flow down later. ...

*Some of the terminology explanations that mention the "Geissler Burette" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…容積目盛のついたガラス管で,下端にガラス製コック,またはガラス球の入ったゴム管とピンチコック付きの細いガラス管がついており,これらを開閉させて内部の液を必要な量だけ流出させ,前後の目盛の読みの差から流出した液の容積を正確に知ることができる。最も典型的なものが図の左のコック付きで,ガイスラービュレットGeissler buretteという。目盛を読むとき上部の液面はメニスカス(表面張力により湾曲した表面)ができるので,目盛の読み方に気をつける必要があるし,また,液を急激に流出させると器壁に付着した少量があとから流れてくるので注意しなければならない。…

※「ガイスラービュレット」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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