. Public health and preventive medicine. , there is danger from fracture,owing to settling of the wall, and itis necessary to arch the wall overit to prevent any pressure fromweight. Having tints traced the soil pipeto the drain or sewer, it is necessaryto revert for a moment to its con-nection with the water-closets asregards ventilation (see Fig. 139).It was stated that the ventilatingpipe from the highest closet in ahouse might open directly into theupper part of the soil pipe. In thecase of the other closets, their ventilating and antisyphonage pipes shouldpass to a special air shaft, whic
. Public health and preventive medicine. , there is danger from fracture,owing to settling of the wall, and itis necessary to arch the wall overit to prevent any pressure fromweight. Having tints traced the soil pipeto the drain or sewer, it is necessaryto revert for a moment to its con-nection with the water-closets asregards ventilation (see Fig. 139).It was stated that the ventilatingpipe from the highest closet in ahouse might open directly into theupper part of the soil pipe. In thecase of the other closets, their ventilating and antisyphonage pipes shouldpass to a special air shaft, which is the continuation upwards of the ventilatingpipe of the lowest closet, and which opens into the upper part of the soil pipeabove the place where it is .joined by the exit pipe of the highest closet, ormay itself open free like the soil pipe. If the soil pipe or house drain of thehouse under consideration joins a town drain or a sewer, the further considera-tion of the sewage journey is dealt with in the description of town DISPOSAL OF SEWAGE 359 If, <ui the other hand, the house be Isolated, we pass at once to the discussionof the ultimate fate of the soil pipe or house drain contents. These maypass into— 1. A cesspool, though other methods of disposal arc preferable. A cess-pool must be capacious, covered; water-tight, ventilated, a sufficient distancefrom any house, road, or water supply, emptied at regular intervals, and shutoff from the house by means of a ventilating, intercepting trap on the pipeleading to it. The pit should he large enough to hold the sewage of severalmonths, hut its contents should he frequently pumped out, mixed with dryearth, and used as manure. A .special pumping apparatus, such as Merry-weathers, ought to he used. The cesspool is built of brick, faced withcement, and surrounded by puddle clay, and is (dosed above by a tightly-fitting man-hole cover. Ventilation is secured by means of the interceptingtrap, where this is adjacent,
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectprevent, bookyear1902
