cryophorus


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cryophorus

(kraɪˈɒfərəs)
n
(General Physics) a glass tube with a bulb at each end which contains water and water vapour, used in physics to demonstrate freezing by evaporation
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Under its new name 'cryophorus' (Wollaston [1812], [1813]), the instrument was discussed in virtually every textbook for chemistry up to the end of the 19th century.
The first instrumental development was William Hyde Wollaston's 'cryophorus'.
Through the 1800s the cryophorus was commonly used to demonstrate the effect of pressure on evaporation, and simultaneously the heat loss suffered in evaporation (Comstock [1845], p.