Table V.
M (1) 47
Rate of
Total Colonies
Mac Conkey's Lactose Neutral Red Bile Salt Peptone Water.
Sample.
Date.
on Agar
filtra-
in lec
Results of the Bacteriological Examination of the Pokfulam Water Supplies for the year 1922.
Presence of the Coli group. tion. at 37° C. 1 c.c. 1 c.c. 2 c.c. 5 c.c. 10 c.c. 20 c.c. 50 c.c. Unfiltered, 9-1-22. SI Filtered, 9-1-22. 96 Unfiltered, 6-2-22. 114 Filtered, 6-2-22. 13 Unfiltered, 13-3-22. 17 + + + Filtered, 13-3-22. 31 Unfiltered, 3-4-22. 87 +1 +1 + Filtered, 3-4-22. 23 Unfiltered, 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. 30 +1 +1 +1 +1 +1 +1 Filtered, 2-10-22. 5 Unfiltered, 1-11-22. 716 +1 +1 +1 +1 +1 +1 +1 Filtered, 1-11-22. TO Unfiltered, 4-12-22. +1 +1 +1 +1 +1 +1 +1 Filtered, 4-12-22. 130 Group IV in 1 c.c. Group IV in 50 c.c. Group I in 1 c.c. Negative up to 50 c.c. Group I. Group I. in 1 c.c. Group II. in 20 c.c. Group I. Group in c.c. Negative up to 50 c.c. Group I in 2 c.c. Negative up to 50 c.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. Acid only, - = No Change.++++++
++++++
| + | + | + | + | + 1 + 1 + 1 + 1 +
+++:+ !+1 +1 +1 +1 +1
+++ 1 + 1 + 1 + ++++ | + | + |
++++++
+++ 1