. A treatise on hygiene and public health . Fig. Fig. 80. JEl,ushinfj of sewers.—AVe have seen that, in order to prevent sedi-mentary deposits in sewers, a certain velocity of flow must be as every sewer has, more or less, an intermittent flow, the velocityrequired to make them self-cleansing cannot always be secured, and henceit is a difficult matter, in practice, to keep sewers thoroughly cleansedand in good working order, without some additional means for removingthe sediment and for washing away the slimy matter which collects upontheir sides and crown. This is especial
. A treatise on hygiene and public health . Fig. Fig. 80. JEl,ushinfj of sewers.—AVe have seen that, in order to prevent sedi-mentary deposits in sewers, a certain velocity of flow must be as every sewer has, more or less, an intermittent flow, the velocityrequired to make them self-cleansing cannot always be secured, and henceit is a difficult matter, in practice, to keep sewers thoroughly cleansedand in good working order, without some additional means for removingthe sediment and for washing away the slimy matter which collects upontheir sides and crown. This is especially necessary for sewers which havebeen badly constructed, or which, from too little fall, too great size, or wantof proper flow, are unable to carry forward the solid matters suspendedin the sewage. Arrangements for flushing are, therefore, absolutelynecessary to remove these deposits and keep the channels free from ob-structions. The object of these arrangements is to discharge a body of 474 SOIL AND WATER. water, or sewage, at a veloci
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthygiene, bookyear1879
