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Show THE DISINFECTION OF WATER-SUPLIES. WATER-SUPLIES. The increasing use of hypochlorite for thop purification of drinking-water supplies makes the subject of proper methods of applying this and othor chemicals a timely one. The usual method of Introducing the disinfectant dis-infectant into the suction-pipe or suc-tionwell suc-tionwell has not proved altoiteUir satisfactory owing to the injury to the pumpvalves, and other difficulties. An Ingenious device for applying chemicals directly to "water flowing In pipes under pressure la described in a recent number of the Engineering Engineer-ing Nows. The principle of the apparatus ap-paratus consists In so roguiatlng the pressure by mechanical contrivances that the solution is forced through -the feedpipe at a rate always pro-portionnl pro-portionnl to the existing rate of flow -through tho main. Tho Journal of tftc American Medical Association, July S, 1911. .-. x i nn- |