pneumatic trough การใช้
- Alt = Engraving of assorted scientific equipment, such as a pneumatic trough.
- He made important revisions to the existing combustion methods with a sophisticated pneumatic trough.
- Hales invention of the pneumatic trough to collect gases over water is also considered a major technical advance.
- The bottle is filled with water, inverted, and placed into the pneumatic trough already containing water.
- Modified forms of the pneumatic trough were later used by William Brownrigg, Henry Cavendish and Joseph Priestley in their research.
- The pneumatic trough was integral thereon in work with gases ( or, as contemporary chemists called them, airs ).
- These revisions were the flushing of the combustion tube with carbon dioxide and the addition of potassium hydroxide in the pneumatic trough.
- After the invention of the pneumatic trough, Stephen Hales continued his research into the different airs, and performed many Newtonian analyses of the various properties of them.
- In 1772, Joseph Priestley began experimenting with different airs using his own redesigned pneumatic trough in which mercury instead of water would trap gases that were usually soluble in water.
- Using a pneumatic trough, he would mix nitrous air with a test sample, over water or mercury, and measure the decrease in volume the principle of burgeoning chemistry of his day.
- A "'beehive shelf "'is a piece of laboratory equipment, usually of pottery, used to support a receiving jar or tube while a gas is being collected over water with a pneumatic trough.
- This test was conducted by mixing nitrous gas with a test sample of another gas and trapping it in the pneumatic trough, essentially the greater the decrease in volume, the more pure the sample of gas was ( key principle in eudiometry ).