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A self-pressurising dewar (silver) being filled with liquid nitrogen from a larger storage tank (white). A cryogenic storage dewar (or simply dewar) is a specialised type of vacuum flask used for storing cryogens (such as liquid nitrogen or liquid helium), whose boiling points are much lower than room temperature.
The Dewar's whisky brand was created by John Dewar, Sr. in 1846. [1] Under the control of his two sons, John A. Dewar Jr. and Thomas "Tommy" Dewar, the brand expanded to become a global market leader by 1896 and began to win several awards, including a gold medal in the 1904 St. Louis World's Fair. [2]
A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that slows the speed at which its contents change in temperature. It greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings by trying to be as adiabatic as possible.
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John Dewar & Sons 1926 client correspondence with watermark on document. John Dewar was born in 1825 in the town of Ochterarder, Scotland. He began his career in the whisky trade in the early 1840s. [1] John Dewar & Sons was officially established by John Dewar and his two sons, John Alexander Dewar and James Dewar, in Perth, Scotland ...
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The chance discovery occurred in mid-January as officials began construction on a playground in Wooler, a small town in Northumberland, England near the Scotland border. A suspicious package found ...
Sir James Dewar FRS FRSE (/ dj uː ər / DEW-ər; [1] 20 September 1842 – 27 March 1923) was a Scottish chemist and physicist. He is best known for his invention of the vacuum flask , which he used in conjunction with research into the liquefaction of gases.