73 
THE FILTERED RIVER WATER FROM TAPS. 
Table showing fermentation in lactose broth of samples tahen from constantly flowing 
hydrant in Lafayette Square. 
JUNE, 1908. 
Day of month. 
^Fermentation in lactose broth. 
' 
0.1 c.c. 
1 c.c. 
10 c. c. 
- 
- 
1 
- 
- 
- 
-t- 
- 
- 
1 
i 
- 1 
1 
+ 
i 
::: i 
1 
, - 
1 
