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Pneumatic trough with bulb suspended from hanger, as invented by Stephen Hales. 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]
The pneumatic trough, invented by Stephen Hales in the 1700s. This was the initial model, used for the collection of airs (gases) produced by combustion. The pneumatic trough, while integral throughout the eighteenth century, was modified several times to collect gases more efficiently or just to collect more gas.
The right-hand drawing is about half the scale of the others and shows the shelf in use inside a pneumatic trough. 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. It is used so that when the gas emerges from the ...
Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.
Pneumatic tubes (or capsule pipelines, also known as pneumatic tube transport or PTT) are systems that propel cylindrical containers through networks of tubes by compressed air or by partial vacuum. They are used for transporting solid objects, as opposed to conventional pipelines which transport fluids.
Here's the hidden growth potential in machine-vision company Cognex Corporation (NASDAQ: CGNX), positioning and workflow-technology company Trimble (NASDAQ: TRMB), and Delta Air Lines (NYSE: DAL ...
Stephen Hales (17 September 1677 – 4 January 1761 [1]) was an English clergyman who made major contributions to a range of scientific fields including botany, pneumatic chemistry and physiology. He was the first person to measure blood pressure .
A Republican county official on Long Island is refusing to lower flags to half-staff following the death of former President Jimmy Carter.