Design moment THERMOS
Dec 22, 2019
2 minutes
He invented the vacuum flask, but life proved no picnic for Oxford University scientist Sir James Dewar – he received little thanks from later generations enjoying piping-hot tea in the great outdoors or on the run.
Dewar actually created the flask to keep liquids cold, not hot. Turning gas into liquid was the Scottish chemist’s obsession. He had devised means of
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