353
specimens contained the largest amount of matter soluble in Hydrochloric Acid. There appears to be no objection to the use of Calcareous sand for the filtration of the public water supplies. From the sand at present used calcium carbonate to the extent of about one grain per gallon is taken into solution in the process of filtration.
WATER.
13. Seventy-seven analyses of water were made for the following:--
Director, Public Works Department Sanitary Board
The Commodore, H.M.S. Victor Emanuel
The Colonel Commanding, Royal Engineers
...48
8
.19
2
77
14. All the samples of water analyzed for the Director of the Public Works Department were derived from the Pokfulam and Taitam services. These analyses-one each month of the water both before and after filtration-were continued in order to obtain exact information as to the efficiency of the filtering operations.
15. In the following table will be found the results of the monthly analysis of the water from both sources as supplied to the City of Victoria and the Hill District.
ANALYSIS OF POKFULAM WATER.
Results expressed in grains per imperial gallon (1 in 70,000).
*
1892.
Appearance
Total solid matter dried
Chlorine.
Hardness.
in 24-in. tube.
Saline Albuminoid ammonia. ammonia.
Oxygen
absorbed.
at 212° F.
بر
January,
m. yellow
4.2
.6
February,
C.; p. y.
4.2
.6
March,
c. b. ; p. y.
4.1
.6
April,
C.; p. y.
3.9
May,...
c. b. ; p. y.
3.9
June,
c. b.; f.
4.5
.7
July,
c. b. ; f.
y.
4.8
.7
August,
4.5
.7
""
September,
4.2
.7
+
"
October,
c.; p. y.
November, December,
c. b.
; y.
AA
4.2
3.4
3.9
GOO7ZEEEEEEN
1.9
None
.0021
.005
1.9
.0042
.013
1.9
.0035
.013
""
2.0
.0014
.013
"}
2.1
.0014
.018
35
1.9
.0014
25
.008
2.0
.0042
.016
>>
2.0
.0014
22
.027
1.9
.0014
,015
1.9
.0014
.015
33
1.9
.0042
.010
""
1.9
.0014
.012
""
33
""
ANALYSIS OF TAITAM WATER.
Results expressed in grains per imperial gallon (1 in 70,000).
1892.
* Appearance
in 24-in. tube.
Total solid matter dried at 212° F.
Chlorine.
Hardness.
Saline ammonia.
Albuminoid ammonia.
Oxygen absorbed.
January, February,
clear; P. J.
4.5
.6
clear; f. y.
4.2
March,
c. b. ; p. y.
4.2
April,
C.;
3.6
++
May..
C. :
3.4
"
June,
C.
4.2
July,..
C.;
4.2
23
August,
c. & b. ; f. y.
3.4
September,
c. &b.; f. y.
3.9
October,
3.9
*
"
November,
3.6
22
??
December,
3.1
hàbably in fr is in is in
1.7
None
.0014
None
.6
1.7
.0014
.003
13
.6
1.8
.0014
None
17
.6
1.9
.0021
.011
.7
1.9
.0021
.017
>>
.6
1.8
.0028
.008
19
7
1.7
.0042
.018
.6
1.8
.0014
.021
.6
1.7
.0014
.007
.6
1.7
.0014
.009
.6
1.9
None
.009
33
.6
1.9
.008
19
"
כל
"
* Abbreviations :-c.-clear; b.-bright; y.-yellow; p.-pale; f.-faint; d.-deposit; t-turbid; A.-flocculent; s.-slight; m.-milky.
16. The above results are eminently satisfactory. The Colony is certainly to be congratulated on the excellent quality of the public water supplies.
17. On the recommendation of the Sanitary Board analyses were made of water drawn at monthly intervals in the Hill District (Mount Gough Police Station). The water in this district is pumped from the Station in Bonham Road to a tank near the Victoria Peak Signal Station and distributed therefrom to houses in that vicinity and to houses in the Mount Gough, Mount Kellett, and Magazine Gap districts. The wrought-iron pipes used for this service appear to have been coated internally