A pneumatic trough is a piece of laboratory apparatus used for collecting gases, such as hydrogen, oxygen and nitrogen. It is mainly made of glass or various fibres and are of various sizes. It was invented by Stephen Hales.[1]
- ^ Pneumatic Trough - Labappara scientific instrument, vol. 1, 2022-08-21, p. 2, archived from the original (PDF) on 2022-08-21, retrieved 2022-08-21