MICROORGANISMS IN WATER 



327 



FIG. 12 v 



g^.,* 



----A 



FIG. 126. 



-- A 



FIG. 127. 



FIGS. 125, 126, and 127. In each figure plan above section through A B below. 

 S = soil; B = impervious subsoil or strata, i, House; 2, well; 3, outhouse; 4, 

 piggery; 5, stables; 6, stable yard; 7, hen house; 8, sheep stable. Arrow heads 

 indicate direction^)! water flow. (Original.) 



