Kirchner — Bacteriological Examination of River Water. 281 



TABLE VI. 

 Summary of Results of Comparative Tests. 



200 



a 

 o 



•< 150 

 H 

 S5 



o 



« 

 H 



^ 100 



H 

 o 



50 



.»! . II O n 



123 4 5 678 9 11 12 13 



Media Lot Numbers. 

 Fig. 2. 



