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Sir James Dewar was a Scottish chemist and physicist. He is probably best-known today for his invention of the Dewar flask, which he used in conjunction with extensive research into the liquefaction of gases. He was also particularly interested in atomic and molecular spectroscopy, working in these fields for more than 25 years.

About 1892 the idea occurred to him of using vacuum-jacketed vessels for the storage of liquid gases - the Dewar flask (otherwise known as a Thermos or vacuum flask) - the invention for which he became most famous. The vacuum flask was so efficient at keeping heat out that it was found possible to preserve the liquids for comparatively long periods, making examination of their optical properties possible. Dewar did not profit from the widespread adoption of his vacuum flask - he lost a court case against Thermos concerning the patent for his invention. While Dewar was recognised as the inventor, because he did not patent his invention there was no way to stop Thermos from using the design.

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Sir James Dewar was a Scottish chemist and physicist. He is probably best-known today for his invention of the Dewar flask, which he used in conjunction with extensive research into the liquefaction of gases. He was also particularly interested in atomic and molecular spectroscopy, working in these fields for more than 25 years.

About 1892 the idea occurred to him of using vacuum-jacketed vessels for the storage of liquid gases - the Dewar flask (otherwise known as a Thermos or vacuum flask) - the invention for which he became most famous. The vacuum flask was so efficient at keeping heat out that it was found possible to preserve the liquids for comparatively long periods, making examination of their optical properties possible. Dewar did not profit from the widespread adoption of his vacuum flask - he lost a court case against Thermos concerning the patent for his invention. While Dewar was recognised as the inventor, because he did not patent his invention there was no way to stop Thermos from using the design. More...

 
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Heike Kamerlingh Onnes was a Dutch physicist. His scientific career was spent exploring extremely cold refrigeration techniques and the associated phenomena. In 1908, he was the first physicist to liquify helium, using cryostats. Using the Joule-Thom...
 
       
 
         
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