. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. tion of this inner chamber B in bottle C is such thatthe mercury in tube F will always rise higher than that in tube Eor G. As the pressure is increased, the mercury is finally forcedout of the chamber B, through tube F, and runs down into tubeG. When all the mercury is thus discharged, the pressure isreleased through contact with the atmosphere, and the excesspressure in bottle C disappears. The mercury in the communi-cating tubes D and E then also recedes and again graduallyfills up the bottle C complete
. The manufacture of pulp and paper : a textbook of modern pulp and paper mill practice. tion of this inner chamber B in bottle C is such thatthe mercury in tube F will always rise higher than that in tube Eor G. As the pressure is increased, the mercury is finally forcedout of the chamber B, through tube F, and runs down into tubeG. When all the mercury is thus discharged, the pressure isreleased through contact with the atmosphere, and the excesspressure in bottle C disappears. The mercury in the communi-cating tubes D and E then also recedes and again graduallyfills up the bottle C completely; part of the mercury runs intochamber B, which is provided with openings at the top for thispurpose. In this way, the lower outlet of tube F in the chamber 42 MANUFACTURE OF SULPHITE PULP §4 B is sealed again, there is no more connection with the atmos-phere, pressure builds up again in bottle C, and the cycle abovedescribed repeats itself. In this manner, an alternately risingand falling movement of the mercury is brought about, whichmovement is employed in the following manner:. Fig. 17. When the mercury falls as above described, the gas to beanalyzed is drawn in from its source to the absorption the coupling J, the mercury seal iv, and tube L, thegas then passes into the burette H, where it is measured. Whenthe mercury rises, the gas from the burette H is forced through §4 PREPARATION OF THE COOKING ACID 43 tube M, mercury seal N, and tube 0, into the caustic potashcontainer P, which is filled with the absorption liquid. Thesulphur dioxide is here absorbed, any remaining gas being forcedthrough tube Q into the gasometer /, which is suspended in aglycerine solution, where it is measured again, and the differenceis recorded as follows: When the gas enters, the gasometer risesand turns the pulley S, which in turn finally acts on pulley the latter, and connected with it by means of a metal chain,hangs the pen U, which draws the analysis curve on the c
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpaperma, bookyear1921
