pneumatic trough

American  

noun

Chemistry.

1. a trough filled with liquid, especially water, for collecting gases in bell jars or the like by displacement.

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pneumatic trough British  

noun

1. chem a shallow dishlike vessel filled with a liquid, usually water, and used in collecting gases by displacement of liquid from a filled jar held with its open end under the surface of the liquid

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Etymology

Origin of pneumatic trough

First recorded in 1820–30

Example Sentences

See Examples For:

pneumatic trough

A weighed amount of oxide of silver is placed in a glass tube connected with a pneumatic trough.

From Scientific Culture, and Other Essays Second Edition; with Additions by Cooke, Josiah Parsons

I was baffled, exasperated, at my wits' end; all the more that I saw his eye roaming impatiently towards the pneumatic trough where some hydrogen gas was collecting for use.

From Cynthia Wakeham's Money by Green, Anna Katharine

This, I at once learned, was the pneumatic trough, the vessel in which the gases were collected.

From The Life of the fly; with which are interspersed some chapters of autobiography by Teixeira de Mattos, Alexander

Dr. Paris refers to the case of a chemist of his acquaintance, who was suddenly deprived of sense as he stood over a pneumatic trough in which he was collecting this gas.

From Popular Education For the use of Parents and Teachers, and for Young Persons of Both Sexes by Mayhew, Ira

His eyes were gazing with horrible fixity at a pneumatic trough.

From The Alkahest by Wormeley, Katharine Prescott