The vessel C (Fig. 4), containing the water in which the bottles are inverted, is called a pneumatic trough.
His eyes were gazing with horrible fixity at a pneumatic trough.
Carbonic acid is rapidly evolved, and may be collected, with some loss, over water in the pneumatic trough.
The hydrogen passes to the jar d, standing on the shelf of the pneumatic trough.
This arrangement saves the trouble of constantly adding and baling out water from the pneumatic trough.
Priestley's pneumatic trough is at this day to be found in every laboratory; it is extremely simple and extremely perfect.
The gas comes over in large quantities, and must be collected in a gas jar, or the pneumatic trough.
A glass tube brings it into communication with a bell jar full of water on the shelf of the pneumatic trough.
This, I at once learned, was the pneumatic trough, the vessel in which the gases were collected.
A weighed amount of oxide of silver is placed in a glass tube connected with a pneumatic trough.