MICROORGANISMS IN WATER. 



209 



FIG. 60. 



/ 



---A 



FIG. 61. 



FIG. 62. 



FIGS. 60, 6 1 and 62. 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 

 of water flow. (Original.) 

 14 



