55 
RAW WATER— Continued. 
OCTOBER. 
Day of month. 
Bacteria 
per c. c. 
B.coliin — j Fermentation in lactose broth. 
0.1 c. c. 
1 c. c. 
10 c. c. 
0.1 c. c. 
1 c. c. 
10 c. c. 
' 
i 
1 
i 
i 
1 
350 
950 
+ 
4- 
+ 
- 
1 1 + + + 1 
+ + + + + + 
1 
800 
750 
400 
+ 
+ 
+ 
250 
800 
700 
900 
850 
1,300 
732 
+ 
+ 
+ 
+ 
+ 
+ 
' + 
: + 
i + 
1 
+ 
+ 
+ 
+ 
+ 
+ 
1 
+ 
1 
+ 
+ 
1 
i 
Average 
i 
i 
