pneumatic trough
Noun
Meaning
pneumatic trough (plural pneumatic troughs)
(chemistry) A piece of laboratory apparatus, consisting of a vessel filled with liquid (generally water or mercury), used for collecting gases. [from 19th c.]
Noun
pneumatic trough (plural pneumatic troughs)
(chemistry) A piece of laboratory apparatus, consisting of a vessel filled with liquid (generally water or mercury), used for collecting gases. [from 19th c.]