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pneumatic trough
noun
, Chemistry.
- a trough filled with liquid, especially water, for collecting gases in bell jars or the like by displacement.
pneumatic trough
noun
- 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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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.
From Project Gutenberg
A weighed amount of oxide of silver is placed in a glass tube connected with a pneumatic trough.
From Project Gutenberg
The vessel C (Fig. 4), containing the water in which the bottles are inverted, is called a pneumatic trough.
From Project Gutenberg
The gas comes over in large quantities, and must be collected in a gas jar, or the pneumatic trough.
From Project Gutenberg
Carbonic acid is rapidly evolved, and may be collected, with some loss, over water in the pneumatic trough.
From Project Gutenberg
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