. Annals of hygiene. ; but over the sandstone and slate lands one wouldhave to go very, very deeply to find anything approaching an im-pervious strata. 9 129 130—The Annals of Hygiene In a region of upturned layers wells are especially danger-ous, for the intervals between the rock layers afford a most excel-lent drain for any surface or cesspool waters if the strata happento incline to that direction, and the deeper the well the more ex-tended is the danger. This is illustrated by the following prac-tical sketch which represents a region of upturned strata. In places like this it makes a grea
. Annals of hygiene. ; but over the sandstone and slate lands one wouldhave to go very, very deeply to find anything approaching an im-pervious strata. 9 129 130—The Annals of Hygiene In a region of upturned layers wells are especially danger-ous, for the intervals between the rock layers afford a most excel-lent drain for any surface or cesspool waters if the strata happento incline to that direction, and the deeper the well the more ex-tended is the danger. This is illustrated by the following prac-tical sketch which represents a region of upturned strata. In places like this it makes a great difference whether aprivy or cesspool is located at A or B, if the well is at C ; if at B,or any direction within ninety degrees on either side of B, thewell will almost certainly be contaminated ; the only possiblelocation for a filth receptacle in relation to C is in the direction ofA. Yet it is very rare for such points to be considered in drillinga well, but they are of vast import if one expects pure I know of a well situated in a region like the above,—a tube-well eighty feet deep, with the upper twenty feet surrounded byan iron tube, and yet this water yields parts of chlorine per100,000, while the normal chlorine of the region is less than onepart per 100,000; the adjoining privy is situated within theregion indicated by B in the sketch, and, of course, the well ispolluted. In using wells for procuring drinking water, much moreattention should be paid to the geological character of the stratathan to the convenience of the household. Geology used to be thought an ornamental study, but it is avery practical one when it comes to drinking well water. The Annals of Hygiene—131 Fever Xursing: and the Nursing: of ContagiousDiseases. BY H. A. ARNOIvD, ,Ardmore, Pa. ITH a display of generosity, that is as embarrassingas it is liberal, the committee has assigned me atopic for this afternoons talk, which has at leastone point of resemblance to the cycle of
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecthygiene, bookyear1896
