Metal Dewar vacuum flask, early 20th century.
UNITED KINGDOM - MAY 17: Reproduction. The vacuum flask was invented by the Scottish physicist James Dewar (1842-1923). This is a reproduction of one of Dewar's experimental flasks that has been cross-sectioned to reveal the inside. The flask contains a partial vacuum between its walls that greatly reduces conduction. A perfect vacuum contains no matter and therefore does not conduct heat. The flask is closed to maintain the vacuum and prevent convection, the transfer of heat by air circulation. (Photo by SSPL/Getty Images)
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Editorial #:
90773989
Collection:
SSPL
Date created:
May 17, 2001
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Release info:
Not released.ÌýMore information
Source:
SSPL
Object name:
10325919
Max file size:
2946 x 3504 px (9.82 x 11.68 in) - 300 dpi - 2 MB