33 
Table showing the number of bacteria and presence of colon bacilli found in samples taken 
from- the inlet of Dalecarlia Reservoir — Coiitiniiecl. 
SEPTEMBER. 
Date. 
Number of bacteria 
per cubic centime- 
ter 
B. coU in— 
Jl ermeutation in sugar 
broth (c). 
(a) 
Filtra- 
tion 
plant. 
(b) 
Agri- 
cultu- 
ral De- 
part- 
ment. 
(0 
Hygi- 
enic 
Labor- 
atory. 
0.1 c. c. 
1 c. c. 
10 c. c. 1 
0.1 c. c. 
1 c. c. 
10 c. c. 
1907. 
Sept. 3... . 
300 
106 
160 
+ (c) 
+ 
4 
600 
208 
250 
+ (o) (c)... 
+ (ai(c) ... 
+ 
+ 
360 
+ (c) 
+ 
+ 
(5 
15, 000 
840 
+ (c) .... 
+ (a) (c)... 
+ (a)(c) ... 
+ 
+ 
+ 
8 . .. 
2,000 
3S2 
700 
+(f) .... 
' + (a)( 6 )... 
+ 
+ 
+ 
9 
220 
300 
+ ( 6 )(c) . . . 

+ ( 6 )(c) . . . 
+ 
+ 
10 
18,000 
530 
+ (c)( 6 )(c) 
+ (c)( 6 )(c) 
+ 
+ 
+ 
11 
2, 700 
340 
800 
+ (a)(c).. 
+ (c)(c) . . . 
+ (a)( 6 )(c) 
+ 
+ 
+ 
i: 
1,000 
716 
800 
-f (c) 
+ (c)( 6 )(c) 
+ (a)( 6 )(c) 
+ 
+ 
+ 
13 
2, 300 
510 
860 
+ (c)( 6 ) (c) 
+ (c)( 6 ) (c) 
+ 
+ 
+ 
14 
2,400 
566 
500 
+ ( 6 ).... 
+ (a)(b)(c) 
+ (a)(&)(c) 
+ 
+ 
+ 
15 ■ 
10 
430 
550 1 
■ 1 
+ ( 6 )(c)-.- 
+ (a)( 6 )(c) 
+ 
+ 
+ 
17 ' 
420 
1,250 
1 
' + (c) 
+ (c) (c) . . . 
+ 
18. 
900 
570 
+ (c). 
+ (c). 
+ 
+ 
19 
2,000 
1,660 
1,700 
-l-( 6 )(c)... 
+ ( 6 )(c) . . . 
- 
+ 
+ 
20 
4,200 
1,200 
1,800 
+ ( 6 )(c).... 
+ ( 6 )(c)... 
+ 
+ 
-t- 
21 
90 
1,100 
550 
1,150 
+ (c) 
+ (c) 
+ 
+ 
+ 
23 
2,400 
1,100 
+ (c). 
+ 
+ 
+ 
24 
4,000 
1,300 
+ (c) 
+ (c) 
+ 1 
+ 
+ 
25 
56,000 
4,000 
1,080 
+ (a)( 6 ) . 
+ («)(&) (c) 
+ (a)( 6 )(c) 
+ 
+ 
+ 
26 
13,000 
2,625 
5,000 
+ (a)( 6 ) . 
+ (a)( 6 )(c) 
+ (c)( 6 )(c) 
+ 
+ 
+ 
07 
4,000 
850 
4,300 
+ (a){b) . 
' + (c)( 6 )(c) 
-4-(a)(c) . . . 
+ 
+ 
+ 
(c). 
! 
28 
15,000 
865 
4,200 
+ (a) 
‘ + (a)( 6 )(c) 
+ (a)(c) . . . 
+ 
+ 
+ 
29 
30 
3,500 
12,800 
+ (a)(c).. 
+ (c)( 6 )(c) 
+ (c)( 6 )(c)‘ 
+ 
+ 
+ 
Average .... 
6, 722+ 
i 1 
590+ 
1,920+ 
i 
i 
i 1 
i 
i 
i 
i 
1 
4021D— OS- 
