Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 105
g beneath thesurface of mercury ina strong iron vessel.A tube supplies the gaswhose pressure is to bemeasured, shown in thefigure connected witha powerful condensingpump, above the sur-face of the mercury.When the pressure isFig. i2s. one atmosphere, the mercury stands at the same level in the iron… … 329. The Steam Guage, as commonly used to measurethe pressure of a boiler, consists of a spring attached to aclosed box. The steam presses against the side of the boxand bends the spring. A lever and index attached to thespring show the amount of bending, that is the pressure.The instrument is…
Physics
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