47 -
Sample.
Date.
Rate of filtra-
Total Colonies
on Agar
Table V.
Results of the Bacteriological Examination of the Pokfulam Water Supplies for the your 1922.
Mac Conkey's Lactose Nentral Red Bile Salt Peptone Water.
Presence of the Coli group.
tion.
in lec at 37° C.
c.c. 1 c.e.
12 e.c.
5 c.c.
10 c.c. | 20 e.c. | 50 e.c.
Unfiltered, 9-1-22.
81
96
114
13
17
+++ |
+++ |
+ [ + ] + |
+1+++ !
++++│+
++++++
+++++
:
31
87
Filtered,
9-1-22.
Unfiltered,
6-2-22.
Filtered,
6-2-22.
Unfiltered,
13-3-22.
Filtered,
13-3-22.
Unfiltered,
3-4-22.
Filtered,
3-4-22.
23
Infiltered,
1-5-22.
300
Filtered,
1-5-22.
5
Unfiltered,
6-6-22.
175
Filtered,
6-6-22.
43
Unfiltered,
3-7-22.
90
Filtered,
3-7-22.
5
Unfiltered,
8-8-22.
140
Filtered,
8-8-22.
50
Unfiltered,
4-9-22.
107
. Filtered,
4-9-22.
Unfiltered,
2-10-22.
8 30
Filtered,
2-10-22.
5
Unfiltered,
1-11-22.
716
Filtered,
1-11-22.
70
Unfiltered,
4-12-22.
Filtered,
4-12-22.
130
14
+1 +1 +1 + | + | ÷ | + | ││+
+++ i ++i+1 +1 ++ |
1 + 1 + 1 ÷ | + | + | + ! + 1 + 1 +
+++ + 1 + 1 + !+ !++ T
+++ │+1 +1 +++++ |+|+|
+++¡+++++++++ + 1+1
Group IV in 1% c.c. Group 1 in 20 c.c. Group IV.
Groups I and IV. Group I in 1 c.c.
B. Coli present in 10 c.c. and
upwards Group undetermined. Group III. Group III.
Group I.
Negative up to 50 e.c. Group IV in 1 e.c.
Group IV in 50 e.c. Group I in 1 c.c. Negative up to 50 c.e. Group 1. Group I.
in 1 e.c. Group 11. in 20 c.c. Group 1. Group 1 in 1 c.c. Negative up to 50 c.c. Group I in 2 c.c. Negative up to 50 e,c. Group III.
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. 1 Acid only, = No Change.
46
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