Definition of Pneumatic trough. Meaning of Pneumatic trough. Synonyms of Pneumatic trough

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Definition of Pneumatic trough

Pneumatic trough
Pneumatic Pneu*mat"ic, Pneumatical Pneu*mat"ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. Pneumonia.] 1. Consisting of, or resembling, air; having the properties of an elastic fluid; gaseous; opposed to dense or solid. The pneumatical substance being, in some bodies, the native spirit of the body. --Bacon. 2. Of or pertaining to air, or to elastic fluids or their properties; pertaining to pneumatics; as, pneumatic experiments. ``Pneumatical discoveries.' --Stewart. 3. Moved or worked by pressure or flow of air; as, a pneumatic instrument; a pneumatic engine. 4. (Biol.) Fitted to contain air; Having cavities filled with air; as, pneumatic cells; pneumatic bones. Pneumatic action, or Pneumatic lever (Mus.), a contrivance for overcoming the resistance of the keys and other movable parts in an organ, by causing compressed air from the wind chest to move them. Pneumatic dispatch, a system of tubes, leading to various points, through which letters, packages, etc., are sent, by the flow and pressure of air. Pneumatic elevator, a hoisting machine worked by compressed air. Pneumatic pile, a tubular pile or cylinder of large diameter sunk by atmospheric pressure. Pneumatic pump, an air-exhausting or forcing pump. Pneumatic railway. See Atmospheric railway, under Atmospheric. Pneumatic syringe, a stout tube closed at one end, and provided with a piston, for showing that the heat produced by compressing a gas will ignite substances. Pneumatic trough, a trough, generally made of wood or sheet metal, having a perforated shelf, and used, when filled with water or mercury, for collecting gases in chemical operations. Pneumatic tube. See Pneumatic dispatch, above.

Meaning of Pneumatic trough from wikipedia

- A pneumatic trough is a piece of laboratory apparatus used for collecting gases, such as hydrogen, oxygen and nitrogen. It is mainly made of gl**** or various...
- study of gases was brought about by Hales with the invention of the pneumatic trough, an instrument capable of collecting the gas given off by reactions...
- receiving jar or tube while a gas is being collected over water with a pneumatic trough. It is used so that when the gas emerges from the delivery tube into...
- pressure. He also invented several devices, including a ventilator, a pneumatic trough and a surgical forceps for the removal of bladder stones. In addition...
- began experimenting with different "airs" using his own redesigned pneumatic trough in which mercury instead of water would trap gases that were usually...
- revisions to the existing combustion methods with a sophisticated pneumatic trough. These revisions were the flushing of the combustion tube with carbon...
- called a gazomètre, to ****ist his work in pneumatic chemistry. It enabled him to weigh the gas in a pneumatic trough with the precision he required. He published...
- water with the metal. Lavoisier developed a new apparatus which used a pneumatic trough, a set of balances, a thermometer, and a barometer, all calibrated...
- developed a "nitrous air test" to determine the "goodness of air". Using a pneumatic trough, he would mix nitrous air with a test sample, over water or mercury...
- decompose, and an alteration of the apparatus which implemented a pneumatic trough at one end, a thermometer, and a barometer. The precision of his measurements...