Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 126
of this instrument is due to theaccuracy with which the contracted passage is formed. A … I04 EXPERIMENTAL SCIENCE. slight change in the shape of this passage seriousl) affectsthe results. The vacuum produced by this aspirator is equal to thatof the mercurial barometer, less the tension of aqueous vapor.That is to sav, when the barometer is at 30 inches, thevacuum produced by the…
Physics · Lantern projection · Electric apparatus and appliances
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