L 74-
from the Public Water Supplies-Pokfulum, Tytam and Kowloon- are now examined quarterly instead of once a month.
These samples from each source are taken on alternate days during a week, the total number of samples examined is therefore the same as when the system was monthly examination, but it is considered that the new system gives a fairer test of the quality of the water.
MATERIALS SENT FOR EXAMINATION.
These amounted to 609 compared with 405 in 1910 and 120 in 1909. The following Table gives briefly the nature of the examination made:-
New Growths,-Examination by section, Widal Reaction for Bacillus Typhosus,.77 " " " Paratyphoid B., Dysenteriæ,#7L 74-
from the Public Water Supplies-Pokfulum, Tytam and Kowloon- are now examined quarterly instead of once a month.
These samples from each source are taken on alternate days during a week, the total number of samples examined is therefore the same as when the system was monthly examination, but it is considered that the new system gives a fairer test of the quality of the water.
MATERIALS SENT FOR EXAMINATION.
These amounted to 609 compared with 405 in 1910 and 120 in 1909. The following Table gives briefly the nature of the examination made:-
New Growths,-Examination by section, Wiidal Reaction for Bacillus Typhosus,.
**
"
"
Paratyphoid B., Dysenteriæ,
Examination by culture for Bacillus Diphtheria,
Vibro Cholera,
Bacillus Dysenteriæ,
Gonococcus,
>
>>
77
#7
"1
19
""
Streptococci,
Malignant Pustule,
Microscopical examination for Tubercle Bacilli, Animal Inoculation for Tubercle Bacilli,..
Microscopical examination for Relapsing Fever,
"
*
**
97
Animal Inoculation for Piroplama Canis,
Examination for Worms,.
37
222
51
....
2
78
8
5
6
1
1
10
...
3
3
Malaria,. Cells, Piroplama Canis,
80
9
1
•
1
1
>1
of Pus for Organisms,
5
·
>>
Urine for Casts,.
1
for Entamoeba,
4
""
..
25
of Clothes for Spermatozoa,
2
"
of Smears for Treponema pallida,.
12
Wasserman's Reaction for Syphilis,
18
Preparation of Autogenous Vaccines,
6
Rideal Walker Estimation of Disinfectants,
Cultural Examination of Urine for Organisms, Breeding out and generic determination of
Dipterous Larvæ, Miscellaneous,
12
6
8
16
609
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