A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 503
her. Theinternal surface of A is blackened,or gilt, in order to enable theformation of dew on the externalsurface to be observed easily.The thermometer E enables thetemperature of the atmosphereto be observed. The bulb D iscovered with muslin, and is satu-rated with some ether. Rapidevaporation of… … Fig. 446.—Darnells hygrometer. is cooled slowly, and presently dew appears on the surface. Take similarreadings to those observed with the Regnault hygrometer and estimatethe dew point and the relative humidity. The sheet of glass should beemployed as before between the observer and the instrument.…
Physics
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