James Dewar

British chemist and physicist (1842–1923)

Sir James Dewar ( DEW-ər; 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 for his research into the liquefaction of gases. He also studied atomic and molecular spectroscopy, working in these fields for more than twenty-five years.

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