Table II.
Results of the Bacteriological Examination of the Kowloon Water Supply for the year 1917.
Rate Total Colo- Date. Sample. Filtra-Agar in Ice int 37°C. for 24 hours. MacConkey's Lactose Neutral Red Bile Salt Peptone Water, Presence of the Coli Group. nies on Fo Cc. 1 cc. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. 40 Unfiltered, 9-1-17. + + + 463 Filtered, 9-1-17. + + + 15 Unfiltered, 11-1-17. + + + 474 Filtered, 11-1-17. + + + 15 Unfiltered, 13-1-17. + + + 183 Filtered, 13-1-17. + + + 45 Unfiltered, 17-4-17. + + + 318 Filtered, 17-4-17. + + + 40 Unfiltered, 19-4-17. + + + 337 Filtered, 19-4-17. + + + 40 Unfiltered, 21-4-17. + + + 339 Filtered, 21-4-17. + + + 150 Unfiltered, 10-7-17. + + + 367 Filtered, 10-7-17. + + + 70 Unfiltered, 12-7-17. + + + 358 Filtered, 12-7-17. + + + 120 Unfiltered, 14-7-17. + + + 352 Filtered, 14-7-17. + + + 40 Unfiltered, 2-10-17. + + + 376 Filtered, 2-10-17. + + + 55 Unfiltered, 4-10-17. + + + 376 Filtered, 4-10-17. + + + 40 Unfiltered, 6-10-17. + + + 376 Filtered, 6-10-17. + + + Presence of the Coli Group. Group III in 20 cc. Group IV in 50 cc. Group III in 20 cc. Negative up to 50 cc. Groups III & IV in 20 cc. Group III in 50 cc. Groups II & III in 1 cc. Group III in 20 cc. Group III in 1 cc. Group III in 50 cc. Group III in 2 cc. Group III in 50 cc. Groups III & IV in 1 cc. Group III in 5 cc. Group III in 20 cc. Group III in 50 cc. Group III in 1 cc. Negative in 50 cc. Group III in 10 cc. Group III in 50 cc. Group III in 10 cc. Negative in 50 cc. Group III in 10 cc. Negative in 50 cc.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.
M72
Table II.
Results of the Bacteriological Examination of the Kowloon Water Supply for the year 1917.
Rate Total Colo-
nies on
Filtra-Agar in Ice
of
Sample.
Date.
tion.
int 37°C. for
24 hours.
MacConkey's Lactose Neutral Red Bile
Salt Peptone Water,
Presence of the Coli Group.
Fo Cc.
1 cc.
2 cc.
5.ee.
10 cc.
20 ec. 50 ec.
Unfiltered,
9-1-17.
40
Filtered, ...
9-1-17.
463
IS
Unfiltered,
1-1-17.
15
Filtered,
11-1-17.
474
2
Unfiltered, 13-1-17.
15
Filtered,
13-1-17. 183
10
Unfiltered,
17-4-17.
45
Filtered,
17-4-17. 318
20
Unfiltered,
19-4-17.
40
Filtered,
19-4-17. 337
10
Unfiltered,
21-4-17.
40
Filtered,
21-4-17. 339
10
Unfiltered,
10-7-17.
150
Filtered,
10-7-17.
367
20
Unfiltered,
12-7-17.
70
Filtered,
12-7-17. 358
10
Unfiltered,
14-7-17.
120
Filtered,
14-7-17. 352
15
Unfiltered,
2-10-17.
40
Filtered,
2-10-17.
376
15
Unfilteral, i
4-10-17.
55
Filtered,
4-10-17.
376
10
Unfiltered,
6-10-17.
40
6-10-17.
376
5
Filtered,
} │+ 1 + ¦ ¦ │+!
...! + i
-+
D+1 +1 +1 + + ¦ ¦ + !!! 1
!+ !+ 1 + 1 + 1 ÷ + ¦ + ¦ +} + ││
+ 1 + 1 + 1 + + + 1 + 1 + + + 1 +++ i + 1 + 1
+++ !+++
1+1+++
Group III in 20 ces.
Group IV in 50 ces,
Group III in 20 ces. Negative up to 50 ees.
Groups III & IV in 20 ces.
Group III in 50 ces. Groups II & III in 1 cc. Group III in 20 ces. Group III in 1 cc. Group III in 50 ees. Group III in 2 ees. Group III in 50 ees. Groups III & IV in 1 cc. Group III in 5 ces. Group III in 20 ees. Group III in 50 ces, Group III in 1 cc. Negative in 50 ees. Group III in 10 ees. Group III in 50 ces. Group III in 10 ces. Negative in 50 ces.
¡ Group III in 10 ees. Negative in 50 ces.
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 72
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