32 
Table shoidng the numher of bacteria and presence of colon bacilli found in samples tahen 
from the inlet of Dalecarlia Reservoir — Continued. 
AUGUST. 
Date. 
Number of bacteria 
per cubic centime- 
ter. 
B. coU in- 
Fermentation in sugar 
broth (c). 
; (6) 
(a) , Agri- 
Filtra-: cultu- 
tion ral De- 
plant. 1 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. 
Aug. 1 
35 
3,000 
-Ka) (6)... 
- 
- 
- 
9 
..12.200 92 
180 
+(a) 
- 
- 
- 
.3 
46 
1 
4 
! 
720 26 
400 
-f-(c) 
+ (c) 
4- 
4- 
6 
.. 2.500 21 
200 
+ (a)(6)(c) 
— 
- 
1.300 112 
220 
-f-(a) 
U(a> (6)... 
4- 
s 
2.300 49 
200 
o. 
9 
. 2.200 65 
260 
4-f6' 
10 
..31.400 63 
50.000 
-f ^.G) (C> 
+ (a) (c)... 
+ (a)(6)(c) 
-r 
- 
4- 
11 
12 
. 2.800 48 
25,000 
+ (a)(6)(c) 
-h(a)(6) (c) 
j- 
13 
760 45 
2.4.50 
+(6) (c)--- 
+(6) (c)... 
4- 
4- 
14 
.. 4.500 133 
16.900 
+(a> (c)--- 
4-(a (c)... 
- 
4- 
U 
15 
1.200 200 
700 
-f (a 
_ 
a_ 
4- 
16 .*.. 
550 50 
300 
+ (C).... 
+(o) (c)--- 
U(a) (c). . 
-f- 
4- 
4- 
17 
310 127 
330 
u(&) 
+(&) 
- 
- 
4- 
18 
19 
. . 650 187 
400 
+ (&) (c)-.- 
+ (6) (c)-- 
- 
a- 
4- 
20 
. . 240 23 
110 
+ (c . . .. 
+ (a5 (cU.. 
+ 
- 
21 *... 
.. 1,300 895 
850 
+ (6) (c)... 
- 
4- 
*>9 
.. 3.800 790 
1,110 
+(6) (c)-.. 
+(6) (c ... 
_u 
. 4- 
4- 
23 i 
.. 2, .500 306 
2.2.50 
-f (cu . . 
-|-(C' 
-|-(C' 
4- 
4- 
4- 
24 
.. 3,900 3.50 
1,400 
+(c 
(c)... 
O- 
4- 
4- 
2.5 
26 
700 190 
6.80 
+ (U . . . 
+ (a)(6)(c) 
+ (a)(6)(c) 
4- 
4- 
O- 
27 
470 
340 
-|-(a) (c)... 
4- (a) {c) ... 
_ 
4- 
2S 
500 
230 
+ (c) . ... 
4- 
4- 
29 
360 
+ (c) - 
4-(c) 
- 
4- 
30 
.. 320 
+(a) (c)-.. 
-i-(a) (c>... 
- 
4- 
4- 
31 
. . 200 115 
200 
+ (CN 
+(c) 
— 
4- 
- 4- 
Average . . . 
.. 2,a57-i- 172 -i- 
4, 487-1- 
* Dalecarlia reservoir by-passed from Aug. 21 to Dec. 31. 
t From tbis date samples taken from the inlet of Georgetown! reservoir. 
