Wells's principles and applications of chemistry; . Questions.—What precaution should be observed in colloctintr p:ases over a pneumatiotrough ? How may gases be transferred from one vessel to another ? 198 INOKGANIC CHEMISTRY, EiG. beneath it the mouth of the ves-sel contaiaing the gas. (See ) On gently inehning thelatter, the gas passes into thesecond vessel. Ajar, wholly or partially filledwith gas at the pneumatic trough,may be removed by placing be-neath it a common plate, deepenough to contain sufficientwaterto cover the edges of the this way gas, especially oxy-gen, m
Wells's principles and applications of chemistry; . Questions.—What precaution should be observed in colloctintr p:ases over a pneumatiotrough ? How may gases be transferred from one vessel to another ? 198 INOKGANIC CHEMISTRY, EiG. beneath it the mouth of the ves-sel contaiaing the gas. (See ) On gently inehning thelatter, the gas passes into thesecond vessel. Ajar, wholly or partially filledwith gas at the pneumatic trough,may be removed by placing be-neath it a common plate, deepenough to contain sufficientwaterto cover the edges of the this way gas, especially oxy-gen, may be preserved for a con-siderable length of time without admixture with the external air. -290. Gasometers.—In order to collect and preserve large quantitiesof. gas, and to experiment with them more conveniently, capacious vessels ofsheet-iron, or copper, called gasometers, are used. They consist in generalof a cylindrical reservoir, suspended -p ^^ with its mouth downward, and fit-ting into an exterior and larger cyl-indrical vecsel, or cistern, filled withwater, as is shown in Fig. 90, whichrepresents a pair of gasometers. Theinner cylinder moves fieely in theouter one, rising and falling as thegas is forced in or pressed o
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectchemistry, bookyear18
