649075-1892-Report-Resident-Engineer-Water-and-Drainage-Dept — Page 13

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TABLE B.

ཁ

CITY OF VICTORIA WATER-WORKS.

Analyses before and after Filtration of the Pokfoolum Water, 1891. Grains per imperial gallon,

b

b

2

THE HONGKONG GOVERNMENT GAZETTE. 30TH JANUARY, 1892.

January.

February.

March.

April.

May.

June.

July.

August. September. October.

November.

December.

b

ม

b

a

b

a

b

蹯

b

a

b

2

b

2

b

蹑

b

a

Appearance in

24 in. tube,.

T.

S.T. T. S.T. T.

C.

T. S.M. N.C. N.C.

C.

C.

C.

C.

C.

ن

3

C.

T.

C.

S.M.

C.

T.

C.

Total solids dried

at 212° F,

3.5

4.7

3.8 5.0 4.8

4.9

4.76 4.76 2.5 2.74

4.76

4.22

5.88

4:48 4.76

4:40 3.13 3:08

3.6

4.5

4.2

4.2

3.4

3.9

Chlorine,

*56

*56

*56

.56

*70

*70 70

•70 -70

*70

•81

.84 ⚫70

*70

.84

·84 •70 *70

.9

.9

*63

.63

'63

•63

Hardness (chalk grains),

1.1 2.1

1.0

2.0

1.2 2.1

1.1

1.9

1.0

1.9

1.00

2:00

1.6

2:00

'60

1.20

.5

1.20

.8 2.0

க

.8

1.7 *90

1.6

Free Ammonia,. none none none nonc ·0014 none ⚫0028 none

⚫0042 none trace

none none none ·0014 none trace

none *0112

none none none none none

Albuminoid Am-

monia,

·0042·00280042 0042

*0084 ·0028·00700042 0063 |·0042 |·0014

none

⚫0014 none *0049 trace 0021

none *0042

none 00280021 0028

none

Oxygen absor-

bed in 4 hours,] •016 -012 |·0036 00360170 |·0088 |·0315 | 0222 06150307 0011 *0002

*008

⚫005 ⚫015·0025 ⚫011 ⚫004 *030 *009

⚫016 ⚫014 *015 ⚫009

Explanation.-C, indicates clear; T. turbid; S.T. slightly turbid; V.T. very turbid; S.M. slightly milky; N.C. nearly clear. Results in Column ↳ are before filtration; in column a after filtration.

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