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Vacuum flask

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Laurence | 03:24 Sat 08th Mar 2003 | How it Works
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who invented the vacuum flask ?
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An experimental scientist named James Dewar (1842-1923). Dewar's speciality was liquefying and freezing gasses, and he devised a vacuum jacket to maintain their temperature. Known as the Dewar flask, it was later marketed commercially as the Thermos flask. He also developed cordite, the explosive propellant.
11:52 Sat 08th Mar 2003

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Vacuum flask

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