NationalLibraryOfScotland/medical-history-of-british-india huggingface dataset:
145
SAMPLE V.—FOUNTAIN No. 12 IN OLD MADRAS ROAD.
Total colonies per cc. on agar at 37° C.—221.
Numbe r . Lact ose.
Sa c c ha r os e .
Dulcite.
Adoni t e.
I n u l i n .
V o g e s a n d P r o s k .
I ndol .
Mo t i l i t y .
Group.
Name of Bacilli.
Group and
Remarks.
Bile salt lactose, medium.
+
-
1 + + - - - - + + IV B. 106
...
... Group I, nil.
1 tube of 20 cc. ... ... ... ...
1
...
2 tubes of 10 cc.
...
...
...
...
2
2 + + - - - - + - IV B. Coscoroba
„
II, nil.
3 + + - - - - + + IV 13. 106
...
...
„
III, nil.
3
,,
5 cc.
...
...
...
...
3
...
3
„
1 cc.
...
...
...
...
3
...
4 + + - - - - + + IV
Do.
...
...
„
IV, 10.
5 + + - - - - + - IV B. Coscoroba.
3
„
.1 cc. ... ... ... ...
1
2
3
„ .01 cc.
...
...
...
...
...
3
6 + + - - - - + + IV B. 106.
7 + + - - -
- + - IV B Coscoroba.
Fœcal bacilli in 1 cc. and upwards.
No vibrios in 100 cc.
8 + + - - - - + - IV
Do.
... Class
I, nil.
9 + + - - - - + + IV B. 100
...
...
" II, 10.
10 + + - - - - + + IV
Do.
...
...
„
III, nil,
REPORT.
The water from the new square well at the south-east end of the Infiltration Gallery shows a somewhat
high total count but is otherwise of quite good quality. The water from the gallery is better. It shows a
total count over one-tenth as great and can be called quite good. There is, however, a sad failing off in distri-
bution and this is specially evident in the sample taken from the first tap after the Service Reservoir. Here
we find a fifty-fold increase in the excremental germs and a ten-fold one in the total count. This section of
the system requires flushing out or some form of attention. The other samples are somewhat better but not
nearly so good as the water drawn from the gallery.
Chemically the water is much as usual, hardish with a good deal of alkaline sulphate. The water of
the new square well contains less total solids and is definitely harder, so there must be less alkaline sulphate
in it.
146
Chemical Analyses.
SAMP LE No. II.
SAMPLE No. V
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Colourless and clear.
None.
None.
Smell.
QUANTITATIVE.
Total solids
...
. .
..
... Parts per 100,000
...
50.000
.
57.000
Temporary hardness ...
...
...
Do.
...
.15.000
15.000
Permanent hardness ...
...
...
Do.
...
1.000
1.000
Total hardness ...
...
..
...
Do.
16.000
16.000
Chlorine
...
...
...
...
Do.
...
2.130
2.130
Ammoniacal nitrogen ...
. .
...
Do.
...
Trace.
Trace.
Albuminoid nitrogen ...
...
...
Do.
Trace.
Trace.
Oxygen absorbed ( Tidy's Process ) ...
Do.
..
0.010
0.008
Nitric nitrogen
...
...
...
Do.
...
0.200
0.200
QUALITATIVE.
Ni trites
...
...
...
...
...
...
..
...
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
...
Present.
Present.
P hosphates
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
Nil, nil.
Nil, nil.
SAMPLE No. I.
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Smell.
None.
QUANTITATIVE.
Total solids ...
...
...
.. ...
...
... Parts per 100,000 ...
47.000
Temporary hardness
...
...
...
...
...
Do
...
22.000
Permanent hardness
...
...
...
...
.
...
Do.
...
1.000
Total hardness
... ...
...
...
... ...
..,
Do.
...
23.000
Chlorine
...
...
...
...
... ...
.
Do.
...
1.775
Ammoniacal nitrogen
...
...
. .. ... ...
Do.
0.003
Albuminoid nitrogen
...
...
Do..
Trace.
Oxygen absorbed ( Tidy's Process)
...
...
...
Do.
...
0.019
Nitric nitrogen
..
...
...
... ...
...
...
Do.
...
0.175
Q U A L I T A T I V E
.
Nitrites
...
...
...
•••
...
...
...
...
...
...
Nil.
S ulphates
...
...
...
...
...
...
...
..
...
Present.
Phosphates
...
...
...
,..
...
...
...
...
...
...
Nil.
Iron, poisonous metals . ... ... ... ... ... ... ... ..
Nil, nil .
148
Chemical Analyses.
SAMPLE NO. I.
SAMPLE No. III.
Physical appearances.
Colour and
Transparency.
White and hazy.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
... Parts per 100,000
...
9.000
9.400
Temporary hardness
...
...
...
Do.
...
1.500
1.500
Permanent hardness
...
...
...
Do....
3.000
3.000
Total hardness
...
...
...
...
Do.
...
4.500
4.500
Chlorine
...
...
...
...
...
Do.
0.710
0.710
Ammoniacal nitrogen
...
...
...
Do....
0.003
0.003
Albuminoid nitrogen
...
...
...
Do....
0.003
Trace.
Oxygen absorbed (Tidy's Process)
...
Do....
0 . 0 1 9
0.019
Nitric nitrogen
...
...
...
...
Do.
...
0.037
0.062
QUALITATIVE.
Nitrites
...
...
...
...
...
. . .
Nil.
Nil.
Sulphates ...
...
...
...
...
...
...
. . .
Trace.
Trace.
Phosphates ...
...
...
...
...
...
...
. . .
Nil.
Nil.
Iron, poisonous metals
...
...
... ...
...
...
. . .
Nil, nil.
N i l , n i l .
150
SAMPLE V.—TAP AT THE END OF KILCHUPET ROAD.
N u m b e r . L a c t a s e . S a c c h a r o s e . Du l c i t e Ad o n i t e I n u l i n .
V o g e s a n d p r o s k
Indol .
Mo t i l i t y . Group.
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C.–4,540.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
...
1
...
1 + +
-
- - - -
+ IV B. 109
...
... Group
I, 6.
2 tubes of 10 cc.
...
...
...
...
2
...
2 + - -
- - - + - I B. Vesiculosus
..
„ I I ,
n i l .
3 „
5 cc.
...
... ...
...
3
...
3 + + -
- - - + + IV B. 106
„
I I I ,
n i l
.
3 „
1 cc.
...
...
... ...
2
1
4 +
- -
- - - + - I B. Vesieulosus
...
„ I V , 4 .
3 „
. 1
c c .
. . .
. . .
. . .
...
3
5
+
- -
- - - + - I
Do
3 „ . 0 1
c c .
. . .
. . .
. . .
. . .
...
3
6 + - -
- - - + - I
Do.
7
+
- -
- - -
+ - I
Do.
Fœcal bacilli in 1 cc. and upwards.
8 + + -
- - -
+
+ IV B. 106
... Class
I, nil.
9
+
- -
- - - -
+
I B. Vesiculosus
„ I I , 2 .
No vibrios in 100 cc.
10 + + -
- - - + - IV B. 109
„ I I I , 8 .
REPORT.
The feature of the results on this occasion is a progressive pollution of a very marked description of the
water with germs of a non-excremental kind. Starting at the spring with a quite satisfactory total count of
95 to the cc. the water gets gradually worse in this respect till the huge total of 4,540 is reached. This seems
to indicate silt throughout the entire system. As regards its content of fœcal germs the spring water is not so
good. as usual and is similar to the tank water in this respect. There is a slight reduction in the fœcal orga-
nisms in the water as distributed which shows that the silts do not contain this type of organism.
Chemically there is a notable increase in the quantity of organic matter and this has a suspiciously low
carbon-nitrogen ratio which is suggestive of an animal origin. The huge total counts may be in association
with this and due to multiplication of the organisms originally present rather than to silt. It is a most
undesirable feature in a water.
Chemical Analyses.
SAMPLE No. II.
SAMPLE No. V.
Physical appearances.
Colour and
Transparency.
Yellowish and
opaque.
White and opaque.
Smell.
None.
None.
QUANTITATIVE.
Total soliods... ...
...
Parts per 100,000 ...
25.000
2 0 . 0 0 0
Temporary hardness
...
...
Do.
...
5.00
5.00
Permanent hardness
...
...
...
Do.
...
2.000 2.000
Total hardness
...
...
.....
Do.
...
7.000
7.000
Chlorine
...
...
...
... ...
Do.
...
1 . 2 4 2
1 . 2 4 2
Ammoniacal nitrogen
...
... ...
Do.
...
0.006
0 . 0 0 7
Albuminoid nitrogen
...
Do.
...
0.168
0 . 0 8 9
Oxygen absorbed (Tidy's Process)
...
Do.
0.400
0 . 2 2 9
Nitric nitrogen
...
...
...
Do.
...
Trace.
Trace.
QUALITATIVE.
Nitrites
...
...
...
... ... ... ... ... ...
Nil.
Nil.
Sulphates ...
... ... ...
...
...
... ... ...
Trace.
Trace.
Phosphates ...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
..
... ... ...
Nil, nil.
Nil, nil.
152
REPORT.
The unfiltered river water is markedly impure both as regards its content of fœcal germs
and its total count. The good quality of the water at the pumping station speaks volumes for
the purifying efficiency of the Infiltration Gallery. This is also seen chemically in the reduction
of the organic matter though it is not so considerable. Unfortunately the really good quality of
the water at the Headworks is not maintained in distribution and there is a specially marked
increase in the number of fœcal germs. These are however mainly of the most resistant
varieties and are not in themselves objectionable, still this increase was not present last year and
to that extent the situation is not so satisfactory.
Chemically the water is hard for river water but it is otherwise fair.
Chemical Analyses .
SAMPLE I.
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
White and opaque.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
...
Parts per 100,000
...
47.000
42.000
Temporary hardness
...
...
...
Do.
...
19.000
19.000
Permanent hardness
...
...
...
Do.
...
1.000
1.000
Total hardness
...
...
...
Do.
...
20.000
20.000
Chlorine
...
...
...
...
Do.
...
6.035
4.970
Ammoniacal nitrogen
... ...
Do.
...
0.006
0.002
Albuminoid nitrogen . . .
...
Do.
...
0.020
0.008
Oxygen absorbed ( Tidy' s Process ) .. .
Do.
...
0.095
0.038
Nitric nitrogen
...
...
Do.
...
0.037
0.050
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
Nil. Nil.
Sulphates
...
...
...
...
...
...
Present.
Present.
Phosphates ...
... ... ... ... ... ...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil,nil.
154
Chemical Analyses.
SAMPLE I.
SAMPLE II.
Physical appearances.
Colour
ands Transparency.
White and hazy.
Whited and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
..
..
...
... Parts per 100,000
. . .
4 3 . 0 0 0
48.000
Temporary hardness ..
..
..
...
Do.
...
2 0 . 5 0 0
2 6 . 0 0 0
Permanent hardness ..
...
..
...
Do.
...
3 . 5 0 0
6 . 0 0 0
Total hardness
...
..
..
...
Do.
...
2 4 . 0 0 0
3 2 . 0 0 0
Chlorine
...
..
...
..
...
Do.
...
2 . 8 4 0
2.840
Ammoniacal nitrogen
..
..
...
Do.
Trace.
0 . 0 0 3
Albuminoid nitrogen ..
..
..
...
Do.
...
Trace.
0 . 0 0 3
Oxygen absorbed(Tidy's
Process) ..
...
Do.
...
0 . 0 1 9
0 . 0 1 9
Nitric nitrogen
••
••
••
••
Do.
...
0.200
0.225
QUALITATIVE.
Nitrites
...
...
..
...
..
...
...
...
Nil .
Nil .
Sulphates
.
.,
...
..
...
. . .
Present.
Present.
Phosphates ..
..
...
..
...
...
...
..
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
. . .
Nil, nil .
Nil, nil.
SAMPLE III.
Physical appearances. .
Colour and
Transparency.
Colourless and clear.
Smell.
None.
QUANTITATIVE.
Total solids
...
...
...
... Parts per 100,000
...
4 9 . 0 0 0
Temporary hardness
..
...
...
Do.
...
2 6 . 5 0 0
Permanent hardness
...
...
..
Do.
. .
6.500
Total hardness
...
...
...
Do.
...
3 3 . 0 0 0
Chlorine
...
...
..
..
...
Do.
2.485
Ammoniacal nitrogen
..
...
..
Do.
...
Trace.
Albuminoid nitrogen
..
...
..
Do.
...
Trace.
Oxygen absorbed (Tidy's
Process)
...
...
Do.
...
0.015
Nitric nitrogen
..
..
..
...
Do.
. .
0.225
QUALITATIVE.
Nitrites
..
..
...
...
...
..
...
Nil .
Sulphates ..
..
..
..
...
...
...
..
...
Present.
Phosphates ...
...
..
..
..
...
...
...
..
Nil
.
Iron, poisonous metals
..
..
...
...
...
...
...
Nil, nil.
156
REPORT.
The water is not so good as it usually is at this season, but this is probably in association
with the heavy rain that was falling at the time which would neutralise the good. effects to be
expected from sedimentation in the Bandami reservoir. The water as distributed is of much
the same quality as that at the headworks, so none of the undesirable additions, probably due to
the intermittency of the supply, are noted on this occasion. The service reservoir seems to be
responsible for introducing a greater variety of fœcal germs, but these are of a highly resistant
type and therefore do not indicate recent pollution. Bacteriologically, the water must be classed
as fair ; chemically it is, as usual, distinctly good.
Chemical Analyses.
Physical appearances.
Colour and
Transparency.
SAMPLE No. I.
SAMPLE No. I V
Brownish and hazy.
Whited and. hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
... Parts per 100,000
4.000
3.600
Temporary hardness ...
...
...
..
Do.
...
Nil.
Nil.
Permanent hardness ...
...
...
...
Do.
...
1 . 5 0 0
1 . 5 0 0
Total hardness
...
..
...
Do.
....
1 . 5 0 0
1 . 5 0 0
Chlorine...
...
...
...
Do.
...
0.213
0.213
Ammoniacal nitrogen ...
...
Do.
..
Trace,
Trace.
Albuminoid nitrogen
. . . . . . .
Do.
0.006
0.003
Oxygen absorbed (Tidy's Process) ...
...
Do.
..
0.076
0.038
Nitric nitrogen
...
...
...
...
Do.
...
Nil.
Nil .
QUALITATIVE.
Nitrites
...
...
...
.....
...
...
...
...
Nil .
Nil.
Sulphates
...
...
..
...
..
...
...
Nil .
Nil .
Phosphates ...
...
...
...
...
...
...
...
Nil .
Nil.
Iron, poisonous metals
...
...
...
...
...
...
Nil, nil.
Nil, nil .
158
REPORT.
The very heavy rainfall which had caused a slight flow in the river-bed is responsible for the
inferior quality of the water on this occasion. When there has been no flow the results have
been much better. The water is characterised by too high total counts and, the presence of 10
fœcal bacilli to the cc. These are not of a very objectionable kind however. With an ample
supply of water the service should be constant. Chemically the water as distributed is very fair.
Chemical Analysis.
SAMPLE No. I.
SAMPLE No. IV.
Physical appearances.
Colour and
Transparency.
White and opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
... ...
Parts per 100,000
...
24.000
18.000
Temporary hardness
... ... ...
Do.
...
6.500
4.000
Permanent hardness
...
...
...
Do.
...
1.500
4.000
Total hardness . ... ... ... ...
Do.
...
8.000
80.00
Chlorine
...
...
...
...
Do.
...
1.420
2.130
Ammoniacal nitrogen
... ...
....
Do.
Trace.
Trace.
Albuminoid nitrogen
...
...
...
Do.
. . .
0.023
0.003
Oxygen absorbed (Tidy's Process)
Do.
...
0.076
0.019
Nitric nitrogen
... ...
...
...
Do.
...
Trace.
0.062
QUALITATIVE.
Nitrites
...
...
...
...
...
... ... ...
Nil.
Nil.
Sulphates
...
...
...
...
,„
.„
...
...
Present.
Present.
Phosphates ...
...
...
..
...
..
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
159
COCANADA.
WATER SAMPLES TAKEN-1sT DECEMBER 1912.
Remarks.—The Samalkota canal was partially flooded when samples were taken. The canal
water was not allowed to run into the settling tank. The supply is intermittent.
There has been about 7.60 inches of rain since last analysis.
Bacteriological Analyses.
SAMPLE I.—SAMALKOTA CANAL.
Number.
Lact ose. S a c c h a r o s e .
Dul ci t e. A d o n i t e . Inulin.
Vo g e s a n d P r o s t .
Indol.
Mo t i l i t y .
Group.
Name of bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C.—670.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. . . .
. . .
. .
. .
1
. . .
1 + + - - - - + - IV B. Coscoroba
. . . Group I, 5.
2 tubes of 10 cc.
...
...
..
. . .
2
. . .
2 + - + - - - + - II B. Schæfferi
„ I I , 4 .
3
„
5
cc. . . .
. . .
. . .
3
. . .
3
+ -
- - - - + - I
B. Vesiculosus
„ III, nil.
3 „ 1 c c .
.
. . . .
.
3
. . .
4
+ -
- - - - + - I
Do.
. . .
„ IV, 1,
3 „ .1 cc.
. . .
1
2
5
+ -
- - - - + - I
D o .
3 „ .01 cc.
. . .
3
6
+ -
- - - - + - I
D o .
7
+ -
- - - - + + I B. Grunthal.
Fœcal bacilli in 1 cc. and and upwards.
8 + - + - - - + - II
B. Schfferi
. . . Class I, 4.
9 + - + -
- - + - II
Do. „ II, 1.
No vibrios in 100 cc.
10 + - + - - - + - II
Do..... . . „ 5.
S A M P L E I I . — S E T T L I N G T A N K .
N o l a c t o s e f e r m e n t e r s .
Total colonies per cc. on agar at 37° C.—400.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
. . .
1
2 tubes of 10 cc. ...
. . .
2
3 „ 5 cc.
...
...
...
. . .
3
3 „ 1 cc. ... ... ... ...
. . .
3
3 „ .1 cc. ...
. . .
3
3 „ .01 cc. ... ... ...
. . .
3
Fcecal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE III.—TAP IN FRONT OF PUMPING STATION.
1 + +-+
- + - - - - IV B. Gasoformans. . . . Group I, nil.
2
+ + - + - -
- - IV
Do.
...
„ II, nil.
Total colonies per cc. on agar at 37° C.—193.
3 + + - + - - - - IV
Do.
„ I I I ,n
i l
.
4 + + - + - -
- - IV
Do....
.
„
„ IV, 10,
B i l e s a l t l a c t o s e , m e d i u m .
+
-
5 + + - + - - - - IV
Do.
6 + + - + - - - - IV
Do.
7 + + - + - - - - IV
Do.
1 tube of 20 cc.
...
...
. . .
. . .
1
...
8 + + - + - - - - IV
Do.
... Class I, nil.
2 tubes of 10 cc. ... ... ...
2
. . . 9 + + - + - - - - IV
Do.
..
„ II, 10.
3 „ 5 cc.
...
... ...
2
1 10
+ + - + - -
- - IV
Do.
...
„
III, nil.
3 „ 1 cc. . . . ... ... ...
1
2
3 „ .1 cc.
...
...
...
1
2
3 „ .01 cc.
...
...
...
. . .
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
45
160
SAMPLE IV.—PILLAR FOUNTAIN NEAR PORT RAILWAY STATION.
Nu mb e r .
L a c t o s e .
S a c c h a r o s e .
Du l c i t e .
Ad o n i t e .
I n u l i n .
V o g e s a n d P r o s k .
I ndol .
Mo t i l i t y .
Gr oup.
Total colonies per cc. on agar at 37° C.—270.
Name of Bacilli.
Group and
Remarks.
Bile salt lactose, medium.
+
—
1 tube of 20 cc.
..
...
...
. . .
1 + + - + -
- -
- IV B. Gasoformans ... Group I, nil.
2 tubes of 10 cc. .
2
2 + + - + - - -
- IV
Do.
•••
„
II, nil.
3
„
5 cc .
...
...
...
2
1
3 + + - + - + -
- IV B. Lactis ærogenes.
„ III, nil.
3
,,
1 cc. ... .
1
2
4 + + - + - - -
- IV B. Gasoformans ...
,, IV, 10.
3 „ .1 cc.
3
.
. . .
3
5 + + - + - - -
- I V
D o
3
„ .01 cc. ... ... ... ..
...
3
6 + + - + - - -
- IV
Do.
7 + + - + - - -
- IV
Do
Fœcal bacilli in 5 cc. and upwards.
8 + + - + - - -
- IV
Do.
... Class I, nil
9 + + - + - - -
- IV
Do.
...
„
II, 10.
No vibrios in 100 cc.
10 + + - + - --
- IV
Do.
„ III, nil.
SAMPLE V.—TAP IN FRONT OF POLICE STATION—TAP No. 17.
1 + + - + - - - - IV B. Gasoformans ... Group I, nil.
Total colonies per cc. on agar at 37° C.—260.
2 + + - + - - - - IV
Do.
„ II, nil,
3 + + - + - - - - IV
Do.
...
„ III, nil.
Bile salt lactose, medium
4 + + - + - - - - IV
Do.
„ IV, 10.
+
-
5 + + - + - - - - IV
Do..
6 + + - + - - - - IV
Do.
7 + + - + - - - - IV
Do.
.. Class I, nil.
1 tube of 20 cc.
...
...
...
...
1
...
8 + + - + - - - - IV
Do.
...
„ II, 10.
2 tubes of 10 cc.
...
...
...
...
2
..
9 + + - + - - - - IV
Do.
... „ III, nil,
3 ,,
5 cc.
...
...
...
...
1 10 + + - + - - - - IV
Do.
, 3
„
1 cc.
...
...
...
...
3
3 „
.
1 c c .
. . .
. . .
. . . .
. . .
3
3 „
. 0 1 c c .
. . .
. . .
. . .
. . .
. . .
3
Fœcal bacilli present in 5 cc.
No vibrios in 100 cc.
REPORT.
The Samalkota canal was partially flooded and showed evidence of recent pollution but as its water
was not being admitted to the settling tanks, this is of secondary importance. The reason why the water was
not being pumped into the tanks demands some explanation. It is stated that people are in the habit of
bathing in the canal during certain hours of the day and certain seasons of the year. Can such bathing not be
restricted to parts of the canal below the intake ? The water of the settling tank, with no lactose fermenters
in 60 cc., is in very good order. The water as distributed is not so good but there is not much to complain
about it.
Chemically but for a considerable amount of highly nitrogenous organic matter the water is very good.
A slight amount of oxidation seems to have taken place during filtration with the result that the nitric
nitrogen is increased, the oxygen absorption is markedly and the albuminoid nitrogen slightly decreased.
161
Chemical Analyses.
SAMPLE I.
SAMPLE II.
Physical appearances.
Colour and
Transparency.
White and opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
. . . Parts per 100,000
. . .
18.000
13.000
Temporary hardness
...
...
. . .
Do.
. . .
7.500
4.000
Permanent hardness...
Do.
. . .
2.000
2.000
Total hardness
...
...
.....
Do.
. . .
9.500
6.000
Chlorine
...
...
...
...
. . .
Do.
. . .
1.065
1.065
Ammoniacal nitrogen...
D o . . .
0.003
0.003
Albuminoid nitrogen
...
...
. . .
Do.
. . .
0.018
0.021
Oxygen absorbed (Tidy’s Process)...
Do.
. . .
0.086
0.076
Nitric nitrogen...
...
...
. . .
Do.
. . .
0.037
0.037
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
. . .
Nil.
Nil.
Sulphates ...
...
...
...
...
...
...
...
. . .
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals ......
...
...
. . .
Nil , nil.
Nil, nil.
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
Colourless and
clear.
Smell.
None.
QUANTITATIVE.
Total solids
...
...
...
...
...
...
...
. . .
Parts per 100,000
. . .
10.000
Temporary hardness
..
...
...
...
...
...
...
Do.
. . .
2.500
Permanent hardness
...
...
...
...
...
...
Do.
. . .
2.000
Total hardness
...
...
...
...
...
Do.
. . .
4 . 5 0 0
Chlorine
...
...
...
...
...
...
...
...
Do.
...
1.065
Ammoniacal nitrogen
...
...
...
...
...
Do.
. . .
Trace.
Albuminoid nitrogen
...
...
...
...
...
...
..
Do.
. . .
0.015
Oxygen absorbed (Tidy's Process)
...
...
...
...
Do.
. . .
0.038
Nitric nitrogen
...
...
...
...
...
...
...
Do.
. . .
0.062
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
...
...
...
Nil.
Sulphates
...
...
...
...
...
..
...
...
...
...
...
...
Present.
Phosphates
...
...
... ... ... ... ... ... ... ... ...
Nil.
Iron, poisonous metals ...
...
... ... ... ... ... ... ... ...
Nil, nil.
163
REPORT.
In respect of quantity the pollution in the water of the river Pennar is much as usual at
this season but the kind is rather better. The water has been subjected to a considerable amount
of natural purification and only the most resistant type of fœcal germs are found surviving.
That being so it is disappointing to find relatively little improvement in the water after passing
through the gallery ; indeed as regards type of fœcal germ present and total count there is
marked deterioration. The water as distributed is better again but not nearly so good as it has
been in recent years.
Chemically there is the same sort of change noted in the water after it has passed through
the gallery. The change is mainly in the direction of improvement but the water is harder.
This points to the admixture of some spring or subsoil water with the river water. A consider-
able amount of oxidation takes place and this is all to the good.
Chemical Analyses.
SAMPLE NO I.
SAMPLE No. IV.
Physical appearances.
Colour and
Transparency.
White and
opaque.
Colourless and
clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
... ... ... ...
Parts per 100,000 ....
32.000
43.000
Temporary hardness ...
...
...
...
...
...
Do.
...
10.000
19.000
Permanent hardness ...
...
...
...
...
...
Do.
...
2.000
2.000
Total hardness ...
...
...
...
...
...
Do.
...
12.000
21.000
Chlorine
... ... ... ... ... ...
Do.
...
2.840
5.680
Ammoniacal nitrogen
...
...
...
...
Do.
...
0.003
Trace.
Albuminoid nitrogen ...
...
...
...
.. . .. .
Do.
...
0.020
0.004
Oxygen absorbed (Tidy's Process) ...
...
...
...
Do.
...
0.098
0.019
Nitric nitrogen
...
...
...
. . .
...
...
Do.
...
0.037
0.062
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
...
... ...
Nil.
Nil.
Sulphates ...
....
...
...
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals ...
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
46