Journal . Oct. 31,1888.] THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. 669 Dr. Hueppe, discussing well-waler supply, emphasises theiinportaucL of the bacteriological examination of water inconnexion with the chemical analysis. Both number andkind of bacteria and germs should be observed. Thequality of the water, as well as its liability to contamina-tion, and the prevention of this latter evil, require carefulattention. The casing of wells should be watertight, andshould descend to a sufficient depth (the lowest limit towhich the influences exerted by cultivation extend is 4 tofi Hi.). Well
Journal . Oct. 31,1888.] THE JOURNAL OF THE SOCIETY OF CHEMICAL INDUSTRY. 669 Dr. Hueppe, discussing well-waler supply, emphasises theiinportaucL of the bacteriological examination of water inconnexion with the chemical analysis. Both number andkind of bacteria and germs should be observed. Thequality of the water, as well as its liability to contamina-tion, and the prevention of this latter evil, require carefulattention. The casing of wells should be watertight, andshould descend to a sufficient depth (the lowest limit towhich the influences exerted by cultivation extend is 4 tofi Hi.). Wells should be closed at the top, and providedwith sufficient ventilation. Wells in the vicinity of cess-pools should be at least .5 m. away from the latter, and thecesspools should be watertight. Draw-wells should beavoided, and only tube-wells (artesian and deep wells)employed. The natural cleansing power of the soil shouldbe taken advantage of, but, as in the case of artificialfilters, the wells should be
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
