Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 161
ress-ure in raising the boiling point. It consistsof a copper globe with a manometer whichdips into a little mercury placed in thebottom of the globe. Water is placedabove the mercury, and a thermometerindicates the temperature, while a safetyvalve prevents all danger. When theglobe is open to the… … 152 COLD FROM EXPANSION. 549. This principle is employed in Papins Digester.This is simply a strong closed vessel in which water canbe heated to a very high temperature. It is employed inextracting gelatine from bones and trimmings of hides; inpreparing steam refined lard; and in similar processes…
Physics
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