i
— 1 —
Table II.
The Examination (post-mortem) of Rats.
Month.
Total. Male, Female,
infected. mant. Plague
Prog. · born ail
Newly
classified. not
January..............................
March February ..............
6,183 3.074 5,923 | 2,9121
3.109 3,011
672
319
742
292
6.527 3.241
3,286
! 817
372
April
6,025 2,970
3.055
781
345
May
6,784 3,401
3.33
2
332
Inne
6,187 | 3,046
3,141
303
July...
5,804 2,897
2,907
:
340
August
5,9071 2,979
2,928
720
284
October September.
5,985 6.058
2.927
766
308
6,177 3,012
3,165
832
333
November...
December........... 6,042 | 2,983
5,701 2.721
2,980
743
*7
3,059
631
8G
Total......... 73,215 36,291| 36,951
2
9,006
3,400
Total
Rate
Colonies
Presence of the Coli group.
Sample.
Date.
oľ
Filtra-
tion.
on Agar in lee at
37° C.
c.c.
1 c.e.
2 c.c.
5 c.c. 10 cc. 20 c,c. 50 cc.
45
Table III.
Results of the Bacteriological Examination of the Kowloon Water Supplies for the year 1922.
Mac Conkey's Lactose Neutral Red Bile
Salt Peptone Water.
- 45 ---
Unfiltered.
9-1-22,
316
Filtered,
9-1-22,
271
Unfiltered,
6-2-22.
90
Filtered,
6-2-22.
Cufiltered,
13-3-22.
53
Filtered,
13-3-22.
FIE
Unfiltered,
3-4-22.
60
Filtered.
3-1-22.
16
Unfiltered,
1-5-22.
70
Filtered, ...
1-5-22.
3
Unfiltered, 6-6-22.
50
Filtered,
6-6-22.
16
Unfiltered,
3-7-22.
317
Filtered,
3-7-22.
13
Unfiltered,
8-8-22. |
800
Filtered,
8-8-22.
40
*
Unfiltered,
+-9-22.
203
Filterol,
4.9-22.
18
Unfiltered, 2-10-22.
23
Filtered,
2-10-22.
5
Unfiltered, 1-11-22.
280
Filtered.
|-11-22.
36
l'ufiltered,
4-12-22.
130
Filtered,
1-12-22.
9
All samples taken either Water Authority in Acid and Gas. L
--
Group IV in 5 c,e.
Absent in 50 e.c, Group I.
Group IV in 1 e,e, Negative up to 50 c.e. Group IV.
Group I.
Group H.
Group I.
No. B. Coli found in Negative up to 50 n.e. Group IV in yo, e.e. Group I in 1 c.e.
Group IV.
Group I.
in 5 c.e. Group 11. in 10 e.e Group 1. Negative up to 50 c.e. Negative up to 50 cự. Group IV in 50 e.e. Group IV in 30 me. Group II.
P.6.
immediately before or immediately after filtration. The rate of filtration is given by the gallons per square yard per day. Classification of the Coli group is that of MacConkey, += Acid only, No Change,