. Principles and practice of plumbing . Fig. 310IMILrjiLion ConlroUoi Digitized by Microsoft® Principles and Practice of Plumbing 223 If clear water for industrial purposes is wanted, it may behad by filtering though sand without coagulant, but fordomestic water supply, where bacterial purity is coagulants must be used. The tabulated report of chem-ical and bacterial tests of gravity water filters, at Lorain, Digitized by Microsoft® 224 Principles and Practice of Plumbing 3 S3 P3J35IM 3,498,6003,447,6403,493,7003,451,6603,441,8003,312,4003,424,300 •jEo 13a -sjo -pssn suin -snB^ JO ■
. Principles and practice of plumbing . Fig. 310IMILrjiLion ConlroUoi Digitized by Microsoft® Principles and Practice of Plumbing 223 If clear water for industrial purposes is wanted, it may behad by filtering though sand without coagulant, but fordomestic water supply, where bacterial purity is coagulants must be used. The tabulated report of chem-ical and bacterial tests of gravity water filters, at Lorain, Digitized by Microsoft® 224 Principles and Practice of Plumbing 3 S3 P3J35IM 3,498,6003,447,6403,493,7003,451,6603,441,8003,312,4003,424,300 •jEo 13a -sjo -pssn suin -snB^ JO ■^mv .,*, \0 so *0 ^ O ^,o lo Ov\OOvO\&tt»0*OvO\ONOvCvOvO\C\ao,0,0«0\»0v0>
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Keywords: ., bookcentury1900, bookdecade1920, bookidcu3192402142, bookyear1922
