Sewage disposal . tream. Two ofthe Salford nozzles are shown in Fig. 97. At Chesterfield andother towns in Derbyshire metal plates were placed over theorifice to break the sewage into fine spray. Most of the latertypes of nozzles attain this end by a cone or plug placed directlyover the orifice and supported either by a central rod or bylateral arms. The Birmingham nozzle, shown in Fig. 97, hasa f-inch opening through which passes a sVinch shank support-ing a plug, which breaks the sewage up very effectually. Nozzleswith such small openings clog badly, and at Birmingham it re-quires the consta
Sewage disposal . tream. Two ofthe Salford nozzles are shown in Fig. 97. At Chesterfield andother towns in Derbyshire metal plates were placed over theorifice to break the sewage into fine spray. Most of the latertypes of nozzles attain this end by a cone or plug placed directlyover the orifice and supported either by a central rod or bylateral arms. The Birmingham nozzle, shown in Fig. 97, hasa f-inch opening through which passes a sVinch shank support-ing a plug, which breaks the sewage up very effectually. Nozzleswith such small openings clog badly, and at Birmingham it re-quires the constant attention of one man to every one and a halfacres to keep them clear. In the United States larger orifices aretherefore preferred, like the Columbus sprinkler shown in Fig. 97,which has a clear aperture of T9^ of an inch with an inverted conesupported above by lateral arms. The general character of thespray formed by these sharply contrasted sprinklers is indicated 340 TREATMENT IN TRICKLING OR PERCOLATING BEDS. COLUMBUS
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1919
