. The street railway review . ette is connected by anelastic tube with the level bottle d, filled two-thirds with top end is connected with a closed capillary tube bent out at aright angle and provided with a three-way cock, b. This tube issupported in a wooden frame, and in addition to the three-waytap. carries two glass taps, g g, each of them possessing capillarytubes, and connected with two U-shaped absorption vessels, f f,filled with bundles of glass tubes. The first of these being closed,the burette is filled with a solution of caustic potash (potassiumhydrate), and the second
. The street railway review . ette is connected by anelastic tube with the level bottle d, filled two-thirds with top end is connected with a closed capillary tube bent out at aright angle and provided with a three-way cock, b. This tube issupported in a wooden frame, and in addition to the three-waytap. carries two glass taps, g g, each of them possessing capillarytubes, and connected with two U-shaped absorption vessels, f f,filled with bundles of glass tubes. The first of these being closed,the burette is filled with a solution of caustic potash (potassiumhydrate), and the second with an .-ilkaline solution of above mentioned liquids serve for absorbing carbon dioxideand the oxygen respectively. Before making an analysis the re-agents in the vessels are set to their zero marks on the capillarytubes below the taps, g g. When in use, the level bottle must beraised to the top of the wooden frame and the three-way tap to thepump connection opened to allow the Iniretle to fill with water up. i-i<;. .3. to the capillary pari. The gas must IIkmi be connected anil aspiialeilby lowering the level bottle after turning the lliree-way lap throughgo. The water must then be run off in the burclte a little belowthe zero mark, the three-way tap closed, and the gas compressedby raising the level bottle \uUil the Water rises above zero. I henthe level bottle must be lowered to allow the excess water lo runout lo zero. Last of all, the three-way lap is opened to pump foran instant in order lo priuliKc a pressure equal lo that of llie atmos-phere, whereupon exactly 100 c. c. of gas will be found within theburette. Now, to absorb the C0« and O respectively; first the carbon dioxide, by conveying the gas into the near U-sliaped is done by raising the level bottle, and at the same lime open-ing tap g. The absorption is hastened by causing the gas to travelseveral times from the L lube to the burette and hack, alternatelylowering and raising the l
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
