1 . 
2 , 
5. 
4. 
5. 
6 . 
7. 
8 . 
9. 
10. 
11 . 
12 . 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20 . 
21 . 
22 . 
23. 
24. 
25. 
26. 
27. 
28. 
29. 
30. 
31. 
49 
Day of month. 
Average 
RAW WATER— Continued. 
MARCH. 
Bacteria 
B . coli in— 
Fermentation in lactose broth. 
per c. c. 
0.1 c. c. 
1 c. c. 
10 c. c. 
0.1c. c. 
1 c. c. 
10 c. c. 
6, 700 
- 
+ 
+ 
- 
+ 
+ 
17, 750 
+ 
+ 
+ 
+ 
+ 
+ 
19,250 
+ 
+ 
+ 
+ 
+ 
+ 
15, 750 
- 
+ 
+ 
+ 
+ 
+ 
9,500 
- 
- 
+ 
+ 
+ 
+ 
9,500 
- 
+ 
+ 
- 
+ 
+ 
9,000 
- 
+ 
+ 
- 
+ 
+ 
6, 500 
- 
+ 
- 
+ 
+ 
5, 850 
+ 
+ 
- 
+ 
+ 
5,550 
+ 
+ 
- 
+ 
+ 
9, 300 
■ 
+ 
+ 
+ 
+ 
+ 
4, 900 
— 
+ 
+ 
- 
+ 
+ 
4, 700 
— 
_ 
+ 
— 
+ 
+ 
3, 600 
- 
- 
+ 
- 
+ 
+ 
3, 100 
- 
- 
+ 
- 
+ 
+ 
2, 500 
- 
- 
+ 
- 
+ 
+ 
2,300 
2, 400 
- 
- 
+ 
- 
+ 
+ 
2,600 
- 
+ 
+ 
- 
+ 
+ 
1, 600 
- 
+ 
+ 
- 
+ 
+ 
2,900 
- 
+ 
+ 
- 
+ 
+ 
5,000 
- 
+ 
+ 
- 
+ 
+ 
3,900 
- 
+ 
+ 
- 
+ 
+ 
1, 500 
- 
- 
- 
- 
+ 
+ 
1,000 
- 
- 
+ 
- 
+ 
+ 
900 
- 
- 
- 
- 
- 
+ 
6, 052 
179— Bull. 52—09 4 
