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pneumatic trough

noun

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


pneumatic trough

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
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of pneumatic trough1

First recorded in 1820–30
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Example Sentences

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

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

The vessel C (Fig. 4), containing the water in which the bottles are inverted, is called a pneumatic trough.

The gas comes over in large quantities, and must be collected in a gas jar, or the pneumatic trough.

Carbonic acid is rapidly evolved, and may be collected, with some loss, over water in the pneumatic trough.

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