36 
THE FILTERED RIVER WATER. 
Table showing the nwniber of bacteria and presence of colon bacilli hi samples taken from 
the outlet of the filtered water reservoir. 
[Daily examinations made by the (a) Laboratory of the filtration plant; (6) Bureau of Plant Indus- 
try of Agricultural Department; (c) hygienic laboratory, Public Health and Marine-Hospital 
Service.] 
MAY. 
Number of bacteria 
per cubic centime- 
ter. 
B. coli in— 
Fermentation in sugar 
broth (c). 
Date. 
(a) 
Filtra- 
tion 
plant. 
(ft) 
Agri- 
cultu- 
ral De- 
part- 
ment. 
(c) 
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. 
May 15 
21 
3 
24 
16 
13 
12 
29 
17 
35 
10 
33 
18 
16 
3 
22 
19 
20 
24 
16 
25 
21 
27 
13 
28 
22 
28’ 
6 
29 
23 
20 
9 
24 
24 
20 
15 
28 
25 * . 
39 
12 
20 
26 
27 
25 
21 
28 ... 
39 
13 
14 
29 
a5 
16 
30 
31 
32 
5 
14 
-b (c) 
+ 
A vernge 
26 -f- 
9+ 
23 -t- 
i 
