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

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

It was withdrawn at the pneumatic trough from the gas through the water, heated red-hot by the spirit-lamp and blowpipe, and then returned when cold into the same portion of gas.

From Experimental Researches in Electricity, Volume 1 by Faraday, Michael

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

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

From The Alkahest by Wormeley, Katharine Prescott

A glass tube brings it into communication with a bell jar full of water on the shelf of the pneumatic trough.

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