NationalLibraryOfScotland/medical-history-of-british-india huggingface dataset:
23
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
Parts per 100,000 ...
51.000
52.000
Temporary hardness ...
...
...
Do.
...
22.000
22.000
Permanent hardness ...
...
...
Do.
...
5.000
5.000
Total hardness
...
...
...
Do.
27.000
27.000
Chlorine
...
...
...
...
Do.
...
5.325
5.325
Ammoniacal nitrogen ...
...
...
Do.
0.003
Trace.
Albuminoid nitrogen ...
Do.
0.002
0.002
Oxygen absorbed ( Tidy's Process) ...
...
Do.
...
0.013
0.006
Nitric nitrogen
...
...
...
Do.
...
0.450
0.500
QUALITATIVE .
Nitrites
...
... ...
... ... ...
... •••
Nil.
Nil.
Sulphates
...
...
...
...
...
... .
...
...
.,..
Present.
Present.
Phosphates ...
... ...
...
...
...
... ... ...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
• • .
Nil, nil.
Nil, nil.
25
REPORT.
Some rather curious results are seen on this occasion. At the headworks the water contains
an exceedingly large number of organisms, of which, however, very few indeed are derived from
animals. After the Service Reservoir is passed we find a most notable reduction in the total
count but the fœcal germs are increased twenty-fold. In the water from a tap in front of
Mustban Sahib's Tomb, there is a further undesirable addition of vibrios which, although they
are not cholera vibrios, cannot be regarded without suspicion. The water as tested in the Old.
Madras Road shows a still further decrease in the total count but even more fœcal germs which
latter are two hundred. times as numerous as they were at the headworks. It would appear that
the filters are working well, but the pipes would be the better of being flushed out. Chemically
the water is hard and contains alkaline sulphates, but is otherwise good.
Chemical Analyses.
SAMPLE I.
SAMPLE IV.
Physical appearances.
C olour and
T r a n s p a r e n c y .
Colourless and clear.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
Parts per 100,000
61·600
60·400
Temporary hardness
Do.
14·500
14·500
Permanent hardness
Do.
0 · 5 0 0
0 · 5 0 0
Total hardness
Do.
15·000
15·000
Chlorine
Do.
2 · 1 3 0
2 · 1 3 0
Ammoniacal nitrogen
Do.
Trace.
Trace.
Albuminoid nitrogen
Do.
0 · 0 0 5
Trace.
Oxygen absorbed ( Tidy's Process )
Do.
0 · 0 2 6
0 · 0 0 6
Nitric nitrogen
Do.
0 · 1 6 2
0 · 1 5 0
QUALITATIVE.
Nitrites
Nil.
Nil.
Sulphates
Present.
Present.
Phosphates
Nil.
Nil.
Nil, nil.
N i l , n i l .
Iron, poisonous metals
27
REPORT.
It is rather surprising to find that although there was no water in the bed of the river,.
except what remained in stagnant pools, that the quality was so good. It was better than it has
ever been at this season, and as the filtration effected by passage through the gallery was quite
effective, the water is distributed was very good indeed. This is all the more gratifying as there
were most undesirable features in the immediate neighbourhood of the gallery, when these
examinations were commenced.
Chemically the water is on the hard side and contains more chloride and soluble sulphate
than is quite desirable. The unfiltered water also shows a good deal of organic matter, mainly
of animal origin, but this is probably in suspension, as the filtered water only shows a little
organic matter of vegetable origin. It is rare to find filtration exerting such a good effect on
water in South India.
Chemical Analyses.
Physical appearances.
Colour and
Transparency.
Slightly yellowish
but clear.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
Parts per 100,000
5 4 · 0 0 0
4 9 · 0 0 0
Temporary hardness
Do.
1 3 · 5 0 0
1 8 · 0 0 0
Permanent hardness
Do.
2·500
2·000
Total hardness
Do.
1 6 · 0 0 0
2 0 · 0 0 0
Chlorine
Do.
l 0 · 2 9 5
7·455
Ammoniacal nitrogen
Do.
0·006
Trace.
Albuminoid nitrogen
Do.
0·013
0·003
Oxygen absorbed ( Tidy' s Process)
Do.
0·090
0·038
Nitric nitrogen
Do.
Nil.
Trace.
QUALITATIVE.
Nitrites
Nil.
Nil.
Sulphates
Present.
Present.
Phosphates
Nil.
Nil.
Iron, poisonous metals
Nil, nil.
Nil, nil.
28
TIRUPATI.
WATER SAMPLES TAKEN—23RD FEBRUARY 1911.
REMARKS.—The River Kalyani was dry when samples were taken. The supply is constant There has been about
2.62 inches of rain since last analysis.
Bacteriological Analyses.
SAMPLE 1.—A SHALLOW WELL ON THE BANK OF KALYANI
RIVER TO THE EAST OF HEADWORKS.
C o l o n y 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 37° C.—23.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. of water taken
...
. . .
1
No lactose fermenters.
2 tubes of 10 cc.
...
...
2
3
„
5 cc.
. . .
3
3
„
1cc
„
...
. . .
3
3
„
.1 cc.
„
...
. . .
3
3
„
...01 cc. ,,
. . .
3
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE II.—A SHALLOW WELL ON THE BANK OF KALYANI
RIVER TO THE WEST OF HEADWORKS.
1
+ -
- - - - +
+
I B. Grunthal
... Group I, 10 .
2
+ -
- - - - + + I
Do.
...
„ II, nil,
3
+ -
- - - - + + I
Do.
...
„ III, nil,
4
+ -
- - - - + + I
Do.
..
„ IV, nil.
Total colonies per cc. on agar at 37° C,—16.
5
+ -
- - - - + + I
Do.
Bile salt lactose, medium
+
-
6
+ -
- - - - + + I
Do.
7
+ -
- - - - + + I
Do.
Class I, nil,
8
+ -
- - - - + + I
Do.
...
1 tube of 20 cc, of water taken
...
1
. . .
9
+ -
- - - - + + I
Do.
...
„ II, nil,
1 0
+ -
- - - - + + I
Do.
.....
„ III, 10,
2 tubes of 10 cc.
„
2
3
„
5 cc.
„
...
. . .
3
3
„
1 cc.
. . .
3
3
„
.1 cc.
...
...
3
3
„ .01 cc.
. . .
3
Fœcal bacilli in 10 cc. and upwards.
No vibri s in 100 cc.
SAMPLE III.—COLLECTING CHAMBER.
1
+ - - - - - + +
I B. Grunthal
... Group I, 10,
Total colonies per cc. on agar at 37° C.—27.
2
+ - - - - - + +
I
Do.
...
„
II, nil,
3
+ - - - - - + +
I
Do.
...
„ III, nil,
Bile salt lactose, medium.
+
-
4
+ - - - - - + +
I
Do.
...
„ IV, 10,
5
+ - - - - - + +
I
Do.
6
+ - - - - - + +
I
Do.
1 tube of 20 cc. of water taken
...
...
1
7
+ - - - - - + +
I
Do.
8
+ - - - - - + +
I
Do.
... Class I, nil,
2 tubes of 10 cc.
1
1
9
+ - - - - - + +
I
Do.
...
,, II, nil,
3 „ 1cc „ ...
...
. . .
1 0
+ - - - - - + +
I
Do.
...
„ III, 10,
3
„
1 cc..... . .
. . .
3
3
„ -
.1 cc..... . .
. . .
3
3 „
.01 cc.
...
...
3
Fœcal bacilli present in 60 cc.
No vibrios in 100 cc.
SAMPLE IV.—A TAP IN WESTERN CORNER IN PALLA STREET.
1
+
-
- - - -
+ + I B. Grunthal
... Group I, 9,
Total colonies per cc. on agar at 37° C.—4,930.
2
+ -
- - - - + + I
Do.
. . .
,, II, n i l
.
Bile salt lactose, medium.
+
-
3
+ -
- - - - + + I
Do.
...
„ III, nil.
„
IV,
1 .
4
+ -
- - - - + + I
Do.
...
5
+ -
- + - - + + I B. 1.
1 tube of 20 cc. of water taken ...
...
1
...
6
+ -
- - - - + + I B. Grunthal.
7
+ -
- - - - + + 1
Do.
2 tubes of 10 cc.
...
...
2
...
8
+ -
- - - - + + I
Do.
... Class I, nil,
3
„
5 cc.
„
...
...
3
. . .
9
+ -
- - - - + + I
Do.
. . .
„
II, 2,
3 „
1 cc.
...
3
...
1 0
+ +
- - - - + + IV B. 106
„
III.
8,
3
„
.1 cc.
...
. . .
3
...
3
„
.01 cc.
. . . .
2
1
Fœcal bacilli in .01 cc. and upwards.
No vibrios in 100 cc.
SAMPLE V.—FROM A PILLAR FOUNTAIN IN NORTHERN
CORNER, A FEW YARDS FROM THE MUNICIPAL HOSPITAL.
C o l o n y 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 37° C.—5,590.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. of water taken
1
1
+ + - + - - +
+
I V
B. 100
Group I, 3.
2 tubes of 10 cc. of water taken
2
2
+ + - + - - + + IV Do.
Group II, nil.
3 tubes of 5 cc. of water taken
3
3
+ - - - - - + + I B. Grunthal
Group III, 1.
3tubes of 1 cc. of water taken
3
4
+ - - - - - + - I B. Vesiculosus
Group IV, 6.
3tubes of ·1 cc. of water taken
3
5
+ + - - - - + + IV B. 106.
3 tubes of ·01 cc. of water taken
1
2
6
+ + - + - + - + IV B.102.
Fœcal bacilli in ·01 cc. and upwards.
7 + + - + - + - + IV
Do.
Class I, nil.
8
+ + - + - + - + IV
Do.
Class II, 7.
9
+ - - - - - + -
I B. Vesiculosus
Class III, 3.
No vibrios in 100 cc.
1 0
+ + + + - + - - III B.67.
REPORT.
For the past year the results got on examining the water of the Tirupati supply have shown a depres
- s i n g u n i f o r m i t y . T h e r i v e r a n d w e l l w a t e r i s o f t e n g o o d , t h a t f r o m t h e c o l l e c t i n g c h a m b e r a l m o s t i n v a r i a b l y
so, but in rassing through the pipes this good supply is absolutely ruined. On the present occasion the
c ont r a s t i s s pe c i a l l y ma r ke d ; f or t he wa t e r a t he a dwor ks i s e xc e e di ngl y pur e whi l e t he wa t e r a s di s t r i but e d i s
exceedingly impure. The total count has been increased nearly two hundred fold, while the fœcal germs are
.six thousand times as many. It is no exaggeration to say that as long as such a state of affairs is allowed to
continue, it is a standing menace to the public health.
Chemically the water is good. The water of the West Well is the harder of the two, but that from the
East Well contains more organic matter mainly of animal origin. This must however be in suspension as no
race of it is seen after the water has passed through the gallery.
Chemical Analyses.
SAMPLE I.
SAMPLE II .
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
Parts per 100,000
26·000
47·000
Temporary hardness
Do.
1 1 · 5 0 0
23·000
Permanent hardness
Do.
3 · 5 0 0
1·000
Total hardness
Do.
15.000
24·000
Chlorine
Do.
1 · 0 6 5
1·420
Ammoniacal nitrogen
Do.
0 · 0 0 2
Trace.
Albuminoid nitrogen
Do.
0 · 0 0 6
Trace.
Oxygen absorbed ( Tidy's Process)
Do.
0 · 0 3 8
0·013
Nitric nitrogen
Do.
T r a c e .
0·075
QUALITATIVE.
Nitrites
N i l
N i l
Sulphates
Trace.
Trace.
Phosphates
Nil.
Nil.
Iron, poisonous metals
Nil, nil.
N i l , n i l .
30
SAMPLE V.
Physical appearances.
Col our and Transparency
Colourless and clear.
Smell.
None.
QUANTITATIVE.
Total solids ...
...
...
...
...
...
...
...
Parts per 100,000 ...
37.000
Temporary hardness
...
...
...
...
...
...
...
Do.
...
17.500
Permanent hardness
...
...
...
...
...
...
...
Do.
1.500
Total hardness
...
... ...
...
...
...
...
Do.
...
19.000
Chlorine
...
...
...
...
...
Do.
...
1.420
Ammoniacal nitrogen
...
...
...
...
...
...
Do.
...
Trace.
Albuminoid nitrogen
...
...
...
...
Do.
...
Trace.
Oxygen absorbed ( Tidy's Process)
...
...
...
...
...
Do.
...
0 . 0 1 9
Nitric nitrogen
... ... ...
...
...
...
...
Do.
0.037
QUALITATIVE.
Nitrites ...
... ... ... ... ... ... ... ... ... ... ...
Nil.
Sulphates
...
...
...
..
...
...
...
... ...
...
Trace
Phosphates
... ...
...
...
... ... ... ... ... ... ...
Nil.
Iron, poisonous metals ......
... ... ... ...
Nil, nil.
33
SAMPLE III.
SAMPLE VI.
Physical appearances.
Colour and
Transparency.
White and hazy.
Colourless and clear.
smell
None.
None.
QUANTITATIVE.
Total solids ...
...
...
. . . ...
Parts per 100,000 ...
22.000
18.000
Temporary hardness
-..
...
...
Do.
...
5.500
5.500
Permanent hardness
. .. . . . ...
Do. ...
2.500
2.500
Total hardness
.
Do.
...
8.000
8.000
Chlorine
...
...
...
...
Do.
...
2.840
2.840
Ammoniacal nitrogen
. . . - . - . . .
Do.
. —
Trace.
Trace.
Albuminoid nitrogen
. ' ....
Do.
. . .
0.008
0.002
Oxygen absorbed (Tidy's Process ) ...
Do.
...
0.064
0.026
. .
Nitric nitrogen. . . . . . . . .
Do.
...
0.025
Trace.
QUALITATIVE.
Nitrites
......
. . . . . . . . . . . . . .
"'
Nil.
.
N Nil.
.
Sulphates
...
...
...
...
...
...
"'
...
...
Present.
Present.
P hosphates ...
...
...
...
...
...
Nil.
Nil.
...
Iron, poisonous metals
......
...
...
...
Nil, nil.
Nil, nil.
9
35
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Colourless and clear.
Smell.
None.
N o n e .
QUANTITATIVE.
Total solids
...
...
...
...
... Parts per 100,000
..
21.000
20.800
Temporary hardness ...
...
...
...
Do.
. . .
6.000
6.000
Permanent hardness ...
...
...
...
Do.
.. .
1500
1.500
Total hardness
...
...
...
Do.
7.500
7 . 5 0 0
Chlorine
...
...
....
Do...
2 . 4 8 5
2.485
Ammoniacal nitrogen
...
...
D o . . . .
Trace.
Trace.
Albuminoid nitrogen ...
...
...
...
Do.
. . .
Trace.
Trace.
Oxygen absorbed (Tidy's Process) ...
...
Do.
0.013
0.011
Nitric nitrogen...
. .. ...
D o . . .
.
.
0.100
0.112
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
. . .
Nil .
N i l
.
Sulphates
... ... ... ... ...
...
...
. . .
Trace.
Trace.
Phosphates ...
...
...
...
...
...
...
. . .
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
Nil, nil.
N i l
,
n i l
.
37
Chemical Analyses.
SAMPLE I.
SAMPLE II .
Physical appearances.
Colour and
Transparency.
Colourless and
clear.
Col ourl ess and
c l e a r .
Smell.
None.
None.
QUANTITATIVE.
Total solids
..
..,
...
...
. ..
Parts per 100,000
51.400
52.000
Temporary hardness
• • '
" •
• "
D o .
17.500
1 7 . 5 0 0
Permanent hardness
Do.
1.500
1.500
Total hardness
• •
Do.
...
19.000
19.000
Chlorine
...
...
...
Do.
4.970
4.970
Ammoniacal nitrogen
...
...
Do....
0.003
Trace.
...
...
...
Albuminoid nitrogen
D o .
0.003
0.002
Oxygen absorbed ( Tidy's Process )
Do.
0.026
0.013
Nitric nitrogen
Do.
0.075
0.075
QUALITATIVE.
Nitrites
...
...
...
......
.. .
...
...
...
Nil.
Nil.
Sulphates
...
...
...
Present.
Present.
Phosphates ...
...
......
...
Nil.
Nil,
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
10
VELLORE.
WATER SAMPLES TAKEN—15TH MARCH 1911.
REMARKS.—The tank now contains about 23.75 feet of water. There was no rain since last analysis. The supply is constant.
Bacteriological Analyses.
SAMPLE I.—UNFILTERED WATER FROM A TAP BEFORE IT
IS LET INTO FILTER-BEDS.
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 37° C.—36.
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 „ .01 cc. ...
...
...
. . .
. . .
3
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE II.—FIRST TAP AFTER FILTRATION.
1
+ -
- - - -
+
- I B. Vesiculosus
... Group I, 10.
Total colonies per cc. on agar at 37° C.—196.
2 + -
- - - - + - I
Do.
...
„ II, n i l
.
Bile salt lactose, medium.
+
-
3 + -
- - - - + - I
Do.
„ I I I ,
n i l
.
4 + -
- - - - +
-
I
Do.
„ I V ,
n i l .
5 + -
- - - - +
-
I
Do.
1 tube of 20 cc.
...
...
...
. . .
1
...
6 +
-
- - - - +
-
I
Do.
7 +
-
- - - -
+
-
I
Do.
... Class I, n i l .
2 tubes of 10 cc.
...
...
...
...
2
...
8 +
- - - - - +
-
I
Do.
„ I I ,
n i l .
3 „
5 cc.
...
...
3
. . .
9 + - - - - - + - I
Do.
... „ III, 10.
3 „ 1 cc.
...
...
...
...
3
. . .
10 + - - - - -
+
- I
Do.
3 „ . 1 cc.
...
...
...
... ...
3
3 „ .01 cc.
...
...
...
. . .
. . .
3
Fœcal bacilli in 1 cc. and upwards.
No vibrios in 100 cc.
SAMPLE III.—TAP IN SAIDAPET IN OLD MUNSIF'S COURT
ROAD.
No lactose fermenters.
Total colonies per cc. on agar at 37° C.—107.
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 IV.—TAP NEAR MUNICIPAL OFFICE.
No lactose fermenters.
Total colonies per cc. on agar at 37° C.—100.
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.
39
REPORT .
From the Bacteriological point of view the water at Vellore could hardly be better. In all
the samples but one no fœcal germs were found in 60 cc. and in the exceptional one there was
only a single such germ per cc. and that of the most resistant kind. Possibly their presence may
lave been due to some small local deposit swept into the bottle. There is no corresponding
increase of the total count such as we would expect if silt were in the pipes to any extent.
Chemically the water continues to he quite fair, though there is rather more organic matter
than on previous occasions and it appears to be mainly of animal origin.
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Slightly yellowish but
clear.
White but
clear.
Smell.
None.
N one.
QUANTITATIVE.
Total solids ...
...
...
. . . . . .
Parts per 100,000 ...
21.000
18.000
Temporary hardness
...
...
. . .
Do.
. . .
6.500
6.500
Permanent hardness
...
...
...
Do.
. . .
1 . 5 0 0
1.000
Total hardness
...
. . .
. . .
. . .
Do.
. . .
8.000
7.500
Chlorine
...
...
. . .
. . .
. . .
Do.
...
1.242
1.242
Ammoniacal nitrogen
. . .
...
. . .
Do.
...
Trace.
Trace.
Albuminoid nitrogen
. . .
. . .
. . .
Do.
. . .
0.014
0.007
Oxygen absorbed (Tidy's Process)
. . .
Do.
. . .
0.115
0.064
Nitric nitrogen
...
...
. . .
. . .
Do.
...
Trace.
0.025
QUALITATIVE.
Nitrites
...
...
. . .
. . .
. . .
...
...
...
. . .
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
...
. . .
p r e s e n t .
Present.
Phosphates ...
...
...
...
. . . ...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
. . . ...
... ...
. . .
Nil, nil.
Nil, nil.
42
42
42
VIZAGAPATAM.
WATER SAMPLES TAKER—21ST AND 22ND MARCH 1911.
REMARKS.—There was no rain since last analysis. The town supply is constant. The level of water in tank is about 15.50 feet.
Bacteriological Analyses.
SAMPLE I.—STORAGE TANK .
N u m b e r . La c t o s e .
Sa c c h a r o s e .
D u l c i t e .
Ad o n i t e .
Inul i n.
V o g e s a n d P r o s k .
Indol.Mo t i l i t y.
• G r o u p .
Name of Bacilli.
Group
and Remarks.
Total colonies per cc. on agar at 37° C.—715.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
...
. . .
1
...
1 + + - + - + - – IV B. Lactis ærogenes. Group I , n i l .
2 tubes of 10 cc.
...
...
. . .
1
1
2 + + - + - + - - IV
Do.
,,.II, n i l .
3 „ 5 cc.
...
. . .
2
1
3 + + - + - + - – IV
Do.
,,.IIIn i l .
3 „
1 cc.
...
...
...
1
2
4 + + - + - + - - IV
Do.
„ IV, 10.
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.
„ II, 10.
No Vibrios in 100 .cc
10 + + - + - + - - IV
Do.
„ III, n i l .
SAMPLE II.—FIRST TAP AFTER FILTRATION.
No lactose fermenters.
Total colonies per cc. on agar at 37° C.—135.
+
-
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 III.—EASTERNMOST TAP NEAR BEACH.
1 + -
- - - - - - I B. Mutabilis...
... Group I,10.
2 + -
- - - - - - I
Do.
...
...
„ II, nil.
Total colonies per cc on agar at 37° C.—800.
3 + -
- - - - - - I
Do.
...
... „ III, nil.
Bile salt lactose, medium.
+
-
4 + -
- - - - - - I
Do.
...
,..
„ IV, ni l .
5 + -
- - - - - - I
Do.
6 +
- - - - - - - I
Do.
1 tube of 20 cc. .. ... ... ...
1
. . .
7 + -
- - - - - - I
Do.
8 + -
- - - - - - I
Do.
...
... Class I, n i l .
9 + -
- - - - - - I
Do.
„ I I ,
n i l .
2 tubes of 10 cc.
...
...
...
2
. . .
10 + -
- - - - - - I
Do.
„ I I I , 1 0 .
3 „
5 cc
...
...
... 1
2
3 „ 1 cc.
...
...
... ...
. . .
3
3 „ .1 cc.
. . .
3
3 „ .01 cc.
...
...
...
...
. . .
3
Fœcal bacilli in 10 cc. and upwards.
No vibrios in 100 cc.
SAMPLE IV.—WESTERNMOST TAP NEAR RAILWAY STATION
COMPOUND.
1
+ - - - - - + - I B. Vesiculosus
..- Group I ,10.
2 + - - - - - + - I
Do.
„ I I ,
n i l .
3
+ - - - - - + - I
Do.
„ I I I ,
n i l .
Total colonies per cc. on agar at 37° C.—50.
4 + - - - - - + - I
Do.
...
„ I V
n i l .
5
+ - - - - - - - I
Do.
6
+ - - - - - + - I
Do.
Bile salt lactose, m e d i u m .
+ -
7
+ - - - - - + - I
Do.
8 + - - - - - + - I
Do. Class I nil.
1 tube of 20 cc. ...
...
...
...
. . .
1
9 + - - - - - + - I
Do.
„ II,n i l
.
10 + - - - - - + - I
Do.
„ III,10.
2 tubes of 10 cc.
...
...
...
2
. . .
3 „
5 cc.
. . . ...
...
1
2
3 „ 1 cc. ...
...
...
...
. . .
3
3 „ .1 cc. ...
...
...
...
. . .
3
3 „ .01 cc. ...
...
...
...
. . .
3
Fœcal bacilli in 10 cc. and upwards.
No vibrios in 100 cc.
43
REPORT.
The Vizagapatam water is still very good though perhaps not quite so good as it was in
December last. Notably we miss the extremely low total counts then recorded. The filtered
water close to the headworks is the best on this occasion, indeed it is the rule for the filters at
Vizagapatam to give efficient results. Sample III shows more fœcal germs and a considerably
increased total count. The fœtal germs are however represented by one highly resistant species,
quite unobjectionable in itself. The same is true of Sample IV, which also shows a greatly
reduced total count and so is better than sample III.
Chemically there is only one point to note. In general the water is much as usual, but
there is a puzzling increase in the figure for chlorine, which is of course associated with an
increase of the total solids in the filtered water. The change seems to have commenced towards
the end of the last year, previous to which the figure for chlorine had always been under three
per 100,000. In December however it was nearly six, and this quarter (March) it is over nine
per 100,000. It is almost as though a saline spring had made its appearance in the lake or in
some part of the catchment area. The increased salinity can go a good deal further without
becoming objectionable, but this point will need to be noted in future analysis.
Chemical Analyses.
SAMPLE I.
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
...
... Parts per 100,000 ...
30.600
28.600
Temporary hardness ...
...
..
...
Do.
...
7.000
7.000
Permanent hardness
... ... ... ...
Do.
...
5.000
5.000
Total hardness
...
...
...
...
Do.
..
12.000
12.000
Chlorine
...
. . .
... ... ...
Do.
...
9.230
9.230
Ammoniacal nitrogen ...
...
.
.. ...
Do.
...
0.002
Trace.
Albuminoid nitrogen ...
...
.
.. ...
D o .
...
0 . 0 1 1
0.006
Oxygen absorbed (Tidy's Process)
...
...
Do.
...
0.090
0.051
Nitric nitrogen
. . .
... ... ...
Do.
...
Trace.
Trace.
QUALITATIVE.
Nit rites
...
...
...
...
...
...
...
...
...
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
... ... ... ... ...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
N i l , n i
l .
Nil, nil.
Report on the Town Water-supplies of the Madras Presidency
for the Quarter ending 30th June 1911, being Part II of
Appendix II to the Annual Report of the King Institute of
Preventive Medicine, Madras, for the year 1911.