39 
Table shmmnri the number of baeteria and presence of colon bacilU in samples taken from 
the outlet of the filtered water reservoir — Continued. 
AUGUST. 
Date. 
Number of bacteria 
per cubic centime- 
ter. 
B. coli in— 
Fermentation in sugar 
broth (c). 
(a) 
Filtra- 
tion 
plant. 
(&) 
Agri- 
cultu- 
ral De- 
part- 
ment. 
(0) 
Hygi- 
enic 
Labor- 
atory. 
0.1 c. c. 
1 c. c. 
10 c. c. 
0.1 c. c. 
1 c. c. 
10 c. c. 
1907. 
Aug. 1 
9 
10 
28 
_ 
9 
6 
37 
28 
3 
18 
2 
4 
20 
5 
15 
26 
f,: 
19 
3 
22 
27 
(?) 
8 
8 
16 
19 
9 
8 
8 
46 i 
10 .... 
9 
36 
11 
17 
! 
12 
10 
2 
34 
+-((•) 1 
1 
- 1 
9- 
13 
11 
47 ‘ 
14 
14 
17 
54 
15 
10 
20 
' 44 
16 
10 
30 
17 
24 
74 
40 
18 
32 
19 . .. 
21 
15 
32 
20 
27 
12 
34 
-1- 
21 a 
21‘ 
21 
39 
i 
+ 
09 . 
20 
3 
3.9 
23 
18 
22 
45 
24 
34 
15 
50 
25 
22 
1 
26 
25 
13 
35 
27 
10 
32 
28 
5 
26 
_ 
29 
9 
(?) 
30 
25 
(?) 
31 
12 
' 46 
Average 
16-t- 
1 
, 15+ 
1 
34+ 
1 
a Dalecarlia Reservoir by-passed from Aug. 21. 
