NationalLibraryOfScotland/medical-history-of-british-india huggingface dataset:
1 120
VIZAGAPATAM.
WATER SAMPLES TAKEN—10TH AND 11TH SEPTEMBER 1912.
Remarks. —There has been about 22.50 inches of rain since last analysis. The town supply is
constant. The level of water in tank is about 18.25 feet.
Bacteriological Analyses.
SAMPLE I.—TANK OR RESERVOIR.
N u m b e r . L a c t o s e . S a c c h a r o s e . D u l c i t e . A d 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 n d o l . M o t i l i t y . G r o u p .
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37º C.—4,100.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
1
. . .
1 + + - -
-
- + - IV B. Coscoroba
Group I, nil.
2 tubes of 10 cc.
2
. . .
2 + + -
-
- - + - IV
Do.
" I I ,
n i l .
3 "
5 cc.
3
...
3 + + - -
-
- + - IV
Do.
" III, nil.
3 " 1cc.
2
1
4 + + - - - - + - IV
Do.
" IV, 10.
3 " .1cc.
. . .
3
5 + + - -
-
- + - IV
Do.
3 "
.01 cc.
. . .
3
6
+
+
-
- -
-
+
- IV
Do.
Fœcal bacilli in 1 cc. and upwards.
7 + + - - - - + + IV B. 106.
8 + + - - - - + - IV B. Coscoroba
Class I, nil.
No vibrios in 100 cc.
9 + + - - - - + - IV
Do.
" II, 10.
10 + + - - - -
+
-
I V
Do.
" III, nil.
SAMPLE II.—FIRST TAP AFTER FILTRATION.
1
+
+ - +
-
-
-
- IV B. Gasoformans
Group I, nil.
2
+
+ - + - - - - IV
Do.
"
II, nil.
Total colonies per cc. on agar at 37º C.—50.
3 + + - + - - - - IV
Do.
" III, nil.
4
+
+ - + - - - - IV
Do.
" I V , 1 0 .
5 + + - + - - - - IV
Do.
Bile salt lactose, medium.
+
-
6 + +
-
+ - - - - IV
Do.
7 + + - + - - - - 1V
Do.
1 tube of 20 cc.
1
. . .
8 + + - + - - - - IV
Do.
Class I, nil.
9 + + - + - - - - IV
Do.
"
II, 10.
10 + + - + - - - - IV
Do.
" I I I ,
n i l .
2 tubes of 10 cc.
1
1
3 " 5cc.
. . .
3
3 " 1 c c .
. . .
3
3 "
.1 cc.
. . .
3
3 "
.01 cc.
...
3
Fœcal bacilli in. 10 cc. and upwards.
No vibrios in 100 cc.
SAMPLE III.—TAP NEAR BEACH—TAP No. 24.
1 + + - -
-
- + - IV B. Coscoroba
Group I, nil.
2 + + - - - - + - IV
Do.
"
II, nil.
Total colonies per cc. on agar at 37º C.—1,410.
3 + + - - - - + - IV
Do.
" I I I .
n i l .
4
+
+ - - - - + -
IV
Do.
" IV, 10.
Bile salt lactose, medium.
+
-
5
+
+ -
- -
-
+
- IN
Do.
6 + + - - - - + - IV
Do.
1 tube of 20 cc.
1
. . .
7
+ + - - - - + - IV
Do.
8 + +
-
- - - + - IV
Do.
Class I, nil.
9 + + - - - - + - IV
Do.
" II, 10.
2 tubes of 10 cc.
2
. . .
10 + + - - - - + - IV
Do.
" III, nil.
3
"
5 cc.
3
. . .
3
" 1 cc.
1
2
3
"
.1 cc.
. . .
3
3
" .01 cc.
. . .
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
SAMPLE IV.—TAP NEAR RAILWAY STATION—TAP NO. 33.
1 +
-
- - - - + +
I
B. Grunthal
Group I, 5.
2
+ - - - - -
+ + I
Do.
" II, nil.
Total colonies per cc. on agar at 37° C.—700.
3 + + -
- -
- - + IV B. 109
" I I I ,
n i l .
4
+ - - - - -
+ + I B. Grunthal
"
IV, 5.
Bile salt lactose, medium.
+
-
5 + + - + - - - - IV B. Gasoformans
" I V ,
n i l .
6 + + - + - - - - IV
Do.
7
+ - - - - - +
+ I B. Grunthal.
1 tube of 20 cc.
. . .
1
8 + + - + - - - - IV B. Gasoformans
Class I, nil.
9
+ + - + - - - -
I V
Do.
" II, 4.
2 tubes of 10 cc.
2
. . .
10
+
-
-
-
- -
+ + I B. Grunthal
" 1 1 I , 6 .
3
"
5 cc.
1
2
3 " 1 cc.
. . .
3
3
"
.1 cc.
. . .
3
3
" .01 cc.
. . .
3
Fœcal bacilli in 20 cc. and upwards.
No vibrios in 100 cc.
121
REPORT.
As there has been a good deal more rain in Vizagapatam this year since the last examina-
tion than during the corresponding period of last year, it is not surprising to find the total count
very high in the tank water, but the very small ratio of germs of excremental origin to the
other kinds bears witness to the gathering ground being in good order. The filters are working
efficiently as is shown by the very large reduction in the total count, the disappearance of sus-
pended matter and a tenfold reduction in the fœcal germs. The water as distributed has
managed to pick up a great many ordinary water germs, but these are not objectionable in
themselves and only serve to show that the pipes would be the better of flushing out. The condi-
tion of affairs is so exactly the opposite to what it was in June that it appears likely that the
inefficiency of the filters then noticed is the cause of the silt in the pipes now. Possibly the
inefficiency of the filters has to do with the want of suspended matter to form the filtering skin,
and the use of some coagulant during seasons of dry weather might improve matters.
Chemically there is notably less chlorine in the water and this almost clinches the supposi-
tion that there is a source of saline water in the bed of the tank. The water from the chemical
point of view is distinctly above the average.
Chemical Analyses.
SAMPLE No I.
SAMPLE No IV
Physical appearances.
Colour and
Transparency.
Brownish and
opaque.
White and
opaque.
Smell.
None.
N o n e .
Q U A N T I T A T I V E .
Total solids
...
...
...
...
...
... Parts per 100,000
. . .
33.000
16.000
Temporary hardness ...
...
...
...
...
...
Do. . . .
5.500
5.500
Permanent hardness ....
...
...
...
Do. . . .
2.500
2.500
Total hardness
...
...
...
...
...
...
Do.
. . .
8.000
8.000
Chlorine
...
...
...
...
...
...
Do. . . .
1.420
1.420
Ammoniacal nitrogen...
...
...
...
. . .
Do. . . .
Trace.
Tr ace.
Albuminoid nitrogen ...
...
...
...
...
Do. . . .
0 . 0 1 6
0.002
Oxygen absorbed (Tidy's Process) ...
...
... ...
Do. . . .
0 . 0 7 6
0.029
Nitric nitrogen...
...
...
. . .
. . .
Trace.
0.037
Q U A L I T A T I V E .
Nitrites
...
...
...
...
...
...
...
...
...
... ...
Nil.
N i l .
Sulphates ...
...
...
...
...
...
...
...
...
Present.
Present.
Phosphates...
...
...
...
...
...
...
. . .
Nil.
N i l .
Iron, poisonous metals ...
...
...
...
...
...
...
Nil, nil.
Ni l , ni l .
35
123
SAMPLE V.—TIGER HILL PIPE LINE.
Total colonies per cc. on agar at 37° C.—275.
N u m b e r . La c t o s e .
S a c c h a r o s e .
D u l c i t e . A d o n i t e . I n u l i n e .
V o g e s a n d P r o s k .
I ndol .
M o t i l i t y . G r o u p .
Name of Bacilli.
Group and
Remarks.
Bile salt lactose, medium.
+
-
1 tube of 20 cc....
...
. . .
1
No lactose fermenters.
2 tubes of 10 cc.
...
...
......
. . .
2
3
"
5 cc.
...
...
...
. . .
3
3
"
1 cc.
...
...
...
...
...
3
3
"
1 cc.
..
...
...
3
3 3
"
'01 cc.
...
. . .
3
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE VI.—TAP IN FRONT OF MARLIMUND RESERVOIR.
Total colonies per cc. on agar at 37° C.—278.
1 + + - - - - +
- IV B. Coscoroba
.. Group I, 3.
2 + + - - - - + + IV B. 106
...
...
" II, nil.
3 + + - - - - + - IV B. Coscoroba
...
", III, nil.
4 + + - - - - + - IV
Do...
,, IV, 7,
5 + + - - - - + + IV B. 106.
Bile salt lactose, medium.
+
-
6 + -
- - - - + - I B. Vesiculosus.
7 + + - - - - + - IV B. Coscoroba.
8 + +
- - - - + - I B. Vesiculosus
... Class I, nil.
9 + -
- - - - +
- I
Do.
II, 7.
1 tube of 20 cc.
...
...
...
...
1
. . . 10 + + - - - - + + IV B. 106
...
..
„ III, 3.
2 tubes of 10 cc.
...
2
...
35 cc.
...
....
"
. . .
. . .
1
2
3
"
1 cc.
....
...
...
3
3
„
.1 cc. ... ... ... ...
...
3
3
„ .01 cc. ... ... ...
...
3
Fœal bacilli in 10 cc. and upwards.
No vibrios in 100 cc.
SAMPLE VII.—MARLIMUND PIPE LINE.
Total colonies per cc. on agar at 37° C.—134.
No lactose fermenters.
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
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE VIII.—TAP IN FRONT OF KODAPPAMUND RESERVOIR.
Total colonies per cc. on agar at 37° C.-30.
1 + + - - - - + - IV B. Coscoroba
... Group I, 9.
2 + -
- - - - + - I B. Vesiculosus
" II, nil.
3 + -
- - - - + - I
Do... ...
" III nil.
4 + -
- - - - + - I
Do... ...
" I V , 1 .
5 + -
- - - - + - I
Do.
6 + -
- - - - + - I
Do.
Bile salt lactose, medium.
+
-
7 + -
- - - - + - I
Do.
8 + -
- - - - + - I
Do.
... Class I, n i l .
9 + -
- - - - + - I
Do.
" II, 1.
1 tube of 20 cc.
...
...
...
1
... 10 + -
- - - - + - I
Do.
„ III, 9.
2 tubes of 10 cc.
...
...
...
... ...
2
3 "
5 cc.
...
...
...
2
1
3 "
1 cc.
...
...
3
3 "
. 1 c c .
. . .
. . . ...
3
3 "
. 0 1 c c .
. . .
. . .
. ...
3
Fœcal bacilli in 20 cc. and upwards.
No vibrios in 100 cc.
125
SAMPLE No. IX.
SAMPLE No. VIII.
Physical appearances.
Colour and
Transparency.
Slightly yellowish
and hazy.
Slightly yellowish
but clear.
Smell.
None.
None.
QUANTITATIVE.
4.000
3.200
Total solids ...
...
...
..
Parts per 100,000
...
Temporary hardness
...
...
Do.
0.500
Nil.
Permanent hardness
...
...
...
Do.
...
1.000
1.000
Total hardness
...
...
...
Do.
...
1.500
1.000
Chlorine
...
...
...
...
Do.
...
0.497
0.355
Ammoniacal nitrogen
......
Do.
Trace.
Trace.
Albuminoid nitrogen
...
...
...
Do
. ...
0.004
Oxygen absorbed ( Tidy's Process)
...
Do.
...
0.019
0.066
Nitric nitrogen
...
...
Do.
...
Trace.
Nil.
QUALITATIVE.
Nil.
Nil.
Nitrites
...
...
...
...
...
...
...
...
...
Sulphates ...
...
...
...
...
...
...
...
...
Trace.
Nil.
Phosphates ...
...
...
...
...
...
..
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
36
127
SAMPLE V.—TAP AT THE END OF BASTION ROAD TERMINUS,
FOUNTAIN No. 12.
Number. L a c t o s e .
S a c c h a r o s e .
Dul ci t e.
Ad o n i t e . I n l i n n e . Vo g e s a n d p r o s k .
I ndol .
Moti l i ty.
Gr oup.
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C.—60.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
...
...
...
1
1 + + — + — — — — IV B. Gasoformaus
... Group I, nil.
2 tubes of 10 cc.
...
...
...
2
2 + + — + — — — — IV
Do.
...
„ II, nil.
3 „ 5 cc.
...
...
... ...
1
2
3 + + — + — — — — IV
Do.
„ III, nil.
3 „ 1 cc.
...
...
... ... ...
3
4 + + —
+
— — — — IV
Do.
...
„ IV, 10.
3 „ .1 cc.
...
... ...
...
3
5 +
- - + - -
- - IV
Do.
3 „ .01
cc.
...
...
... ...
3
6
+ +
—
+
- -
—
- IV
Do.
Fœcal bacilli present in 60 c.c.
7 + + — + — — — — IV
Do.
8 + + — + — — — — IV
Do.
... Class
I, nil.
9 +
+
—
+
—
-
—
- IV
Do....
„ I I , 1 0
No vibrios in 100 cc.
1 0
+
+
—
+
— — — —
IV
Do.
„ III, nil.
REPORT.
There is frequently something in the management of the Kurnool waterworks that seems to require
explanation. How does it come for instance that with the canal in high flood the supply is intermittent and
the service reservoir so low that a sample could not be got from the tap discharging from it. Again while
it is not surprising to find a total count of 4,500 in the water of the flooded canal it is eminently so to find
nearly 4,000 in the water of the Northern. Settling tank from which water was being discharged on to the
filters. How long had the water been settling before this ? We see that in. two days there has been a notable
reduction of the total count in the water of the Southern tank ; surely there should have been a much more
notable one in the tank that had presumably been settling for a much longer period. It is pleasant to note
that the filters are performing efficiently and that the water though scanty in amount is distributed in very
good order. Chemically also the water is excellent.
Chemical Analyses.
SAMPLE 1.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Muddy.
White and opaque.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
...
Parts per 100,000 ...
*1,130.000
26.000
Temporary hardness
...
...
...
Do....
3.500 3.500
Permanent hardness
...
...
...
Do....
3.500
1.500
Total hardness
...
...
...
...
Do....
7.000
5.000
Chlorine
...
...
...
...
...
Do....
1.420
1.420
Ammoniacal nitrogen
...
...
...
Do.
0.006
0.003
Albuminoid nitrogen
...
...
...
Do.
...
0.257
0.019
Oxygen absorbed ( Tidy's Process)
...
Do.. ..
1.981
0.105
Nitric nitrogen
...
...
...
...
Do....
Nil
.
Nil .
QUANTITATIVE.
Nitrites
... ... ...
...
... ...
..
...
...
Nil.
Nil .
Sulphates
...
...
...
...
...
...
...
... ...
Present.
Present.
Phosphates ...
...
...
...
...
...
...•
Nil .
Nil .
Iron, poisonous metals
...
...
...
...
...
Nil, nil .
Nil, nil.
*Very muddy and full of sand and mud in suspension.
128
SAMPLE II.
SAMPLE V.
Physical appearances.
Colour and Transparency.
Brownish and opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
... Parts per 100,000...
34.000
13.600
Temporary hardness
...
...
. ...
Do
...
3.500
3.500
Permanent hardness
...
...
...
...
Do.
...
1.500
1.500
Total hardness ...
...
...
...
Do.
...
5.000
5.000
Chlorine ...
.....
...
...
...
Do.
...
1.420
1.242
Ammoniacal nitrogen ...
...
Do.
Trace.
Trace.
Albuminoid nitrogen
......
...
Do.
...
0.017
0.003
Oxygen absorbed (Tidy's Process)
...
...
Do.
...
0.114
0.029
Nitric nitrogen ...
...
...
...
...
Do.
...
Nil.
Trace.
QUALITATIVE
Nitrites
...
...
...
...
...
...
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
..
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
Report on the Town Water-Supplies of the Madras Presidency
for the Quarter ending 31st December 1912, being Part IV
of Appendix IV to the Annual Report of the King Institute
of Preventive Medicine, Madras, for the year 1912.
132
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
White and opaque.
White and opaque.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
... Parts per 100,000 ...
31.000
32.000
Temporary hardness ..,
...
...
..
Do....
13.500
13.500
Permanent hardness ...
...
...
...
Do.
1.500
1.500
Total hardness ...
...
...
...
Do....
15.000
15.000
Chlorine
...
...
...
...
...
D o .
2.130
2.130
Ammoniacal nitrogen ...
...
...
...
Do.
0.003
0.003
Albuminoid nitrogen
D o . .
0.006
0.003
Oxygen absorbed (Tidy's Process)
Do.
...
0.037
0.037
Nitric nitrogen
Do.
...
0.125
0.100
QUALITATIVE.
Nitrites
Nil.
Nil.
Sulphates
...
,..
...
...
......
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
134
REPORT.
Vellore water is subject to great variations in quality and it is regrettable to note that, in
the past two years at this season, the water has been much worse than in the previous three
years. This is possibly due to a later onset of the rains ; as on all the occasions on which the
water was better, there was more water in the tank and there had been a considerably greater
fall of rain since the previous analyses. The physical condition of the water, however, seems to
indicate a state of flood, as the water shows a heavy sediment. Possibly only the first impure
runnings were getting access to the tank and that more rain would result in better water. At
such times however the necessity for adequate filtration is more than ever indicated, but the
filtration at Vellore is marked by inadequacy. There is a slight improvement but nothing to
what should be obtained by properly conducted sand filtration. The supply as distributed is
worse again so the pipes probably require scouring out.
Chemically the filtered water is fair enough but it has an objectionable colour.
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Brownish and opaque. Brownish and opaque.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
...
... Parts per 100,000
78.000 *
26.800
Temporary hardness ...
...
...
Do.
...
3.500
5.000
Permanent hardness ...
..
...
...
Do.
. . .
3.500
2.500
Total hardness ...
...
...
...
Do.
...
7.000
7 . 5 0 0
Chlorine
...
...
...
...
...
Do.
...
0.355
0.355
Ammoniacal nitrogen ...
...
...
...
Do.
...
0.003
Trace.
Albuminoid nitrogen ...
...
...
...
Do.
...
0.051
0.015
Oxygen absorbed ( Tidy's Process)
...
...
Do.
...
0.195
0.107
Nitric nitrogen
...
...
...
...
Do.
...
Trace.
Trace.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
.
Nil.
Nil.
Sulphates
...
...
...
...
...
Trace.
Trace.
Phosphates ...
...
...
...
...
...
...
..
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
Nil, nil.
N i l ,
n i l .
* Sediment heavy, full of mud and clay.
136
SAMPLE V.—TAP NEAR SAIDAPET TOLL-GATE.
N u m b e r . L a c t o s e .
Sa c c ha r os e . D u l u c i t e . A d o n i t e . I n u l i n e .
V o g e s a n d P r o s k . Indol.Mot i l i t y.Group.
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C.—1,060.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
1
. . .
1 + +
- - - - +
- IV B. Coscoroba
... Group I, nil.
2 tubes of 10 cc.
1
1
2 + + - - - - + - IV
Do.
...
„
II, nil.
3 „
5 cc.
2
1
3 + + - - - - + - IV
Do.
...
„ I I I ,
n i l
.
3 „
1 cc.
...
...
...
...
. . .
3
4 + + - - - - + - IV
Do.
...
„ I V , 1 0 .
3 „ .1 cc.
...
...
...
...
. . .
3
5 + + - - - - + - IV
Do.
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.
...
„ I I , 1 0 .
No vibrios in 100 cc.
10 + + - - - - + - IV
Do.
...
„ III, nil.
REPORT.
The water in the Red Hills area was not quite so good as it has been at this season for the last two years.
This may possibly be associated with a late onset of the rains. In 1911 there had been a little more and in
1910 twice as much rain in the interval dating from the previous analysis. The water of the Sholavaram.
Channel is especially bad and it becomes a question whether the supply from this source should not be cut off
till monsoon conditions are fully established, and the gathering grounds have had the first impurities washed
away. Madras water has always shown an objectionable amount of organic matter with a low carbon-nitrogen
ratio. The Sholavaram water shows more of this than the lake water. The presence of vibrios in this water
is another highly objectionable feature and may account for their presence in the lake water. Fortunately
they do not appear in the water as distributed, so this may be considered as in a fairly good state.
137
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances
Colour and
Transparency.
Yellowish and
hazy.
Yellowish and
hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
Parts
100,000
per
...
43.000
34.000
T Temporary hardness ...
..... ...
Do.
...
6.500
7.500
Permanent hardness ...
...
...
...
Do.
...
1.500
1.500
Total hardness ...
...
...
... . ...
Do.
8 . 0 0 0
9.000
Chlorine
...
...
...
...
Do.
9.585
6.745
Ammoniacal nitrogen ..... . .. ...
D o .
0.023
0.005
Albuminoid nitrogen ...
...
Do.
...
0.100
0.072
Oxygen absorbed (Tidy' s Process) ...
Do.
...
0.364
0.200
Nitric nitrogen ...
...
..... .... ...
Do.
...
Nil.
Nil.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
Nil.
Nil.
Sulphates ...
...
...
...
...
.... ... ...
Present.
Present.
Phosphates ..
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals ...
...
...
...
...
Nil, nil.
Nil, nil.
SAMPLE V.
Physical appearances.
Colour and
Transparency.
White and hazy.
Smell.
None.
QUANTITATIVE.
Total solids...
...
• .
...
....
...
...
Parts per 100,000 ...
35.000
Temporary hardness
...
...
...
. . .
Do.
.
7.500
Permanent hardness
...
...
...
...
...
. Do.
1.500
Total hardness
. .. . .. .... ...
Do.
...
9.000
Chlorine.. .
.
... . . .
. . .
. . .
. . .
.
Do.
.
6.745
Ammoniacal nitrogen
. . . ... ... ...
Do.
...
0.007
Albuminoid nitrogen
...
...
...
...
...
D o .
0.040
Oxygen absorbed (Tidy's Process) ..
...
...
Do.
..
0.155
Nitric nitrogen... . . . ... . .. . . .
D o . . . .
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
Nil.
Sulphates ...
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Present.
Phosphates...
...
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Iron, poisonous metals ....
.
. . . .
. . .
. . .
. . .
Nil, nil.
139
REPORT.
The river Cauvery being in high flood, its water is, of course, very impure ; but the impurity
is not of a very objectionable kind as all the susceptible varieties of germs which are indicative of
recent and dangerous pollution have been swept away. Still the water is a good deal worse than
it was under very similar circumstances at this season last year, and unfortunately the Infiltra-
tion Gallery has failed to bring about such a complete elimination of the objectionable features, so
we find the filtered water this year of much the same bacterial purity as the unfiltered water last
year. A farther small improvement is to be noted in the water after passing through the Service
Reservoir, but this is evanescent and the water as drawn from a tap near the Cantonment Rail-
way Station is worse than that at head-quarters. Probably there is some silt in this section of
the pipes.
Chemically the filtered water is quite good and very notable reductions in the suspended and
organic matter has resulted from passage through the Infiltration Gallery.
Chemical Analyses.
SAMPLE I.
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
Muddy and opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
... Parts per 100,000 ...
* 146.000
16.000
Temporary hardness
...
...
Do.
...
5.500
6.500
Permanent hardness ....
Do.
...
3.500
3.000
Total hardness
. .
. . .
. . .
Do.
...
9.000
9.500
Chlorine
...
...
...
...
...
Do.
...
1.065
1.065
Ammoniacal nitrogen
...
...
Do.
...
0.003
Trace.
Albaminoid nitrogen..
Do.
...
0.062
0.002
Oxygen absorbed (Tidy's Process) ......
Do.
...
0.533
0.029
Nitric nitrogen
...
...
...
...
Do.
...
Trace.
Trace.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
Nil.
N i l .
Sulphates ...
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
... ... ... ... ...
Nil, nil.
N i l , n i l .
* Flood water, very muddy.
40
141
REPORT.
The flooded river water is of course pretty impure but curiously enough the bacterial
impurity is not so great this year whereas the chemical and suspended impurities are much greater.
The results of filtration are remarkably good. and we find the filtered water to be of really first-
class quality. The Tanjore Infiltration Gallery has worked efficiently in recent years but in this
year it has surpassed all previous records. There would appear to be some silt in the pipes as
there is a progressive deterioration of the water as distributed. The sample from Kurichi North
Street though still pretty fair has picked up quite a surprising variety of excremental germs, and
the sample drawn in the Municipal Office though it shows fewer varieties contains a greater
number of such germs.
Chemically the water is in a very good order-after filtration. Possibly the large amount of
suspended matter in the raw river water has to do with improved efficiency of the Gallery.
Ch emical Analyses.
SAMPLE I.
SAMPLE IV.
Physical appearances.
Colour and.
Transparency.
Muddy and. opaque.
Colourless and Clear.
Smell
None.
None.
QUANTITATIVE.
Total solids
...
... ... ... Parts per 100,000
. . .
*182.000
17.000
Temporary hardness ...
...
...
Do.
..
7.000
7.000
Permanent hardness ...
...
...
Do.
. . .
2.500
2.500
Total hardness
...
...
...
Do.
...
9.500
9.500
Chlorine...
...
Do.
...
1.065
1.065
Ammoniacal nitrogen
...
...
Do.
...
0.002
Trace.
Albuminoid nitrogen ...
...
Do.
...
0.060
0.003
Oxygen absorbed ( Tidy's Process ) ...
Do.
...
0.476
0048
Nitric nitrogen
...
...
..
Do.
...
Trace.
Trace.
QUALITATIVE.
Nitrites
...
...
...
...
Nil.
Nil.
Sulphates
...
...
...
..
...
Present.
Present.
Phosphates
...
...
...
...
Nil.
Nil.
Iron,poisonous metals ... ... ...
Nil, nil.
Nil, nil.
* F l o o d w a t e r , v e r y m u d d y .
143
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Yellowish and
hazy.
Yellowish and
hazy.
Smell.
None.
None.
.
QUANTITATIVE.
...
Total solids
...
...
...
... Parts per 100,000
...
54.000
34.000
...
Temporary hardness ...
...
...
Do.
...
1 7 . 5 0 0
18.000
Permanent hardness ...
...
...
...
...
Do.
...
3.500
3.000
Total hardness ...
...
...
..
...
...
Do.
...
21.000
21.000
...
Chlorine...
...
...
Do.
...
3.372
3.372
. . .
Ammoniacal nitrogen ......
...
...
Do.
...
0.003
Trace.
Albnminoid nitrogen ...
...
...
...
Do.
...
0.003
0.003
Oxygen absorbed (Tidy's Process) ......
Do.
0 . 0 1 0
0.010
Nitric nitrogen
...
...
...
...
...
Do.
...
0.250
0.262
.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
. . .
Nil.
Nil.
Sulphates
...
...
...
...
...
...
. . .
Present.
Present.
Phosphates
...
...
...
...
...
...
...
...
. . .
Nil.
Nil.
Iron, poisonous metals
...
...
... ...
...
...
..
. . .
Nil, nil.
Nil, nil.
41