Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 166
Pig. 182. 563. Hygrometers are instruments for measuring the 156 HEAT. … h}Tgrometric state of the air. They act either by coolinga body through evaporation, or by absorption. 564. Daniells Hygrometer, Fig. 183, consists of twoglass bulbs connected by a glasstube bent twice at right angles.The larger bulb, A, is filled abouttwo-thirds full of ether, and con-tains a…
Physics
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