Table II.
Results of the Bacteriological Examination of the Kowloon Water Supply for the year 1919.
Rate Total Colo- MacConkey's Lactose Neutral Red Bile Salt Peptone Water. Presence of the Coli Group. of Sample. Date. Filtra- at 37°C.for Agar in 1 cc tion. 24 hours. To ec. 1 cc. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. Unfiltered, 14-1-19. ... Filtered, 14-1-19. 349 15 5 Unfiltered, 16-1-19. 30 Filtered, 16-1-19. 349 15 Unfiltered, 18-1-19. 35 Filtered, 18-1-19. 349 20 Unfiltered, 29-4-19. 35 Filtered, 29-4-19, 349 6 Unfiltered, 1-5-19. 50 .. Filtered, 1-5-19. 349 10 Unfiltered, 3-5-19. 70 Filtered, 3-5-19. 349 15 Unfiltered, 22-7-19. 10 Filtered, 22-7-19. ... · Unfiltered, 24-7-19. 2 50 Filtered, 24-7-19, 10 ... 50 5 Unfiltered, 26-7-19. Filtered, 26-7-19. Unfiltered, 7-10-19. .. • Filtered, 7-10-19. 13 4 Unfiltered, 9-10-19. 30 ... Filtered, 9-10-19. 13 Unfiltered, 11-10-19. 10 7 Filtered, 11-10-19. 11 + 1 + | I + ! | | + | + 1 + 1 + | + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 ÷00] + 1 + 1 + + | + | + | +!!│+ 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 Presence of the Coli Group. Group III in ] ce. Negative up to 50 ccs. Groups II & IV in 10 ccs. Negative up to 50 ccs. Group II in 10 ces. Group IV in 50 ccs. Groups III & IV in 1 cc. Group I & III in 50 ccs. Group IV in 1 cc. Negative up to 50 ces. ec. Negative IV in Negative up to 50 ces. in cc.. 2 in 1 cc. 1 in 20 ccs., 2 in 20 ccs. 4 in 2 ccs. Negative up to 50 ccs. 4 in 10 ces. 1 in 5 ces. 4 in 20 ccs.MacConkey's Classification of Coli Group not available.
All samples taken either immediately before or immediately after filtration. The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli Group is that of MacConkey, + = Acid and Gas ; = Acid only; = No change.
M 73
Table II.
Results of the Bacteriological Examination of the Kowloon Water Supply for the year 1919.
Rate Total Colo-
MacConkey's Lactose Neutral Red Bile Salt Peptone Water.
nies ou
Presence of the Coli Group.
of
Sample.
Date.
Filtra-at 37°C.for
Agar in 1 cc
tion. 24 hours. To ec.
1 cc.
2 cc.
5 cc. 10 cc. 20 cc. 50 cc.
Unfiltered, Filtered, Unfiltered,
14-1-19.
...
14-1-19. 349
15 5
16-1-19.
30
Filtered,
16-1-19. 349
15
Unfiltered,
18-1-19.
35
Filtered,
•
18-1-19. 349
20
Unfiltered,
29-4-19.
35
Filtered,
29-4-19,
349
6
Unfiltered,
1-5-19.
50
..
Filtered,
1-5-19.
349
10
Unfiltered,
3-5-19.
...
70
Filtered,
3-5-19.
349
15
Unfiltered,
22-7-19.
10
Filtered,
22-7-19.
·
Unfiltered,
24-7-19.
Filtered,
24-7-19, 26-7-19. 26-7-19.
...
2
50
...
10
...
50 5
Unfiltered,
Filtered,
Unfiltered,
..
•
7-10-19.
Filtered,
Unfiltered,
Filtered,
7-10-19.
13 4
9-10-19.
30
...
9-10-19.
13
Unfiltered, 11-10-19.
Filtered,
11-10-19.
10 7
...
11 + 1 + |
I + ! | | + | + | + | + 1 +
.
÷00] + 1 + 1 + 1 + 1 + | + | + |+|+|
+!!│+1 +1 +1 +1 +1 +1 4
+1 +1 +1 +1 +1 +1 +1 +1 +1 + !+ !+ !
+1 +1 +1 +1 +1 +1 +
++ 1+1++
+ | + | +++++|+|+
++++ |+
Group III in ] ce.
Negative up to 50 ccs. Groups II & IV in 10 ccs.
Negative up to 50 ccs.
Group II in 10 ces. Group IV in 50 ccs.
Groups III & IV in 1 cc.
Group I & III in 50 ccs.
Group IV in 1 cc. Negative up to 50 ces.
ec.
Negative IV in Negative up to 50 ces.
in cc.. 2 in 1 cc.
1 in 20 ccs., 2 in 20 ccs. 4 in 2 ccs.
Negative up to 50 ccs.
4 in 10 ces. 1 in 5 ces.
4 in 20 ccs.
MacConkey's Classification of Coli
Group not available.
All samples taken either immediately before or immediately after filtration. The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli Group is that of MacConkey, + = Acid and Gas ;
Acid only;
No change.
M 73
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