Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 48
the axis of the indexC, wliich points out the degrees of saturation of the atmo-sphere. A helical spring D is fastened at its lower end toa bracket projecting from the front of the back piece A, itscontrary extremity being fastened, by means of a counecting-cord, to the index axis C. The actionof… … M HYGROMETER. tphere, moves the index round accordingly, and thus indicates upon the graduated dial the ratio omoisture existing at the time being. The dew-point is readily found by first ascertaining the exact temperature at the time of observation,and from this subtracting the number indicated on…
Mechanical engineering · Mechanics · Engineering
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