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An example of radiant heat. “Radiant heat is transmitted in a vacuum as well as air.” A thermometer is on top of the glass flask. The flask neck is narrowed by the blowpipe. The flask is attached to an air pump with which a vacuum is produced in the interior.
Keywordsthermometer, flask, heat, Vacuum, Radiation, radiant heat, heat transfer
International Correspondence Schools A Textbook on Mechanical and Electrical Engineering (Scranton, PA: International Textbook Company, 1897)
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