A manual of practical hygiene for students, physicians, and health officers . ovfT, (Jiis (orni of inij) is very <X|KnHivf ;irt(lbulky. In llic (itlicr inclliod, the. , hrarurli in coimcrfiid with aveil! ilnljii^ pipe l»\ :i hiMtidi IVoiii ils iip|icr [lorlioti. (Inlcns on*- orili(M»(.li(r of llicsc I \vo iiMlliixIs is .?idnplcd, (lie of \\u. trap,j)art;i(Milurly in I he cisc of ;i nmnd plpf ti;ip, an; likely to Ik; Kijilioncdover wluMi its fixliirc is ms(mI or uIhii ,i liirj^c volume of water is din-(!lia,ij:;-anec of oipiilibrinni c-innot, oecMir, since the deseendin|r
A manual of practical hygiene for students, physicians, and health officers . ovfT, (Jiis (orni of inij) is very <X|KnHivf ;irt(lbulky. In llic (itlicr inclliod, the. , hrarurli in coimcrfiid with aveil! ilnljii^ pipe l»\ :i hiMtidi IVoiii ils iip|icr [lorlioti. (Inlcns on*- orili(M»(.li(r of llicsc I \vo iiMlliixIs is .?idnplcd, (lie of \\u. trap,j)art;i(Milurly in I he cisc of ;i nmnd plpf ti;ip, an; likely to Ik; Kijilioncdover wluMi its fixliirc is ms(mI or uIhii ,i liirj^c volume of water is din-(!lia,ij:;-anec of oipiilibrinni c-innot, oecMir, since the deseendin|r mass of watx;rcansos a downward snclion of air thron^h tlu; vent pi[)0 to satisfywhat would otherwise* be a partial vacnnni. In J-ijjj. 71, the diagram Iio. Improper and proper positions of vent pipes. on the right shows the condition after siphonage has occurred ; thegreater part of the water has been drawn over until air can be suckedthrough, and that which remains has fallen back into place. Theresult is that a free communication exists between the fixture aboveand the soil-pipe below. The diagram on the left sliows tlie conditionof the seal if the trap is connected with a ventilating pipe through V. In venting traps in this way, the position of the vent pipe is ofconsiderable importance. Ordinarily, it is placed as shown in thefigure. The objection to this procedure and the proper method areshown in Fig. 72. If the pipe enters in the middle of the bend, eachdischarge of sewage into the trap causes a projection of the liquidupward into the pipe V, and after a time an accumulation is likelyto occur at A. If the pipe is situated fiirther to the right, as in thediawing on the right, this accumulation is not likely to occur, and 518 HABITA
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjecthygiene
