Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 211
principleto the pulse glass, the only difference being that the tubeconnecting the two bulbs is made much larger, to avoidchoking by ice—a thing sure to occur when the tube is ofsmall diameter—the water vapor which is drawn towardthe empty bulb (in a manner presently to be described)being condensed… … WoUastons Cryophorus to drive out the air. When the empty bulb of the appara-tus is placed in a freezing mixture of ice and salt, for exam-ple, the evaporation of the water in the filled bulb, due tothe cooling and condensation of vapor in the empty bulb, israpid enough to carry off the heat to…
Physics · Lantern projection · Electric apparatus and appliances
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