NationalLibraryOfScotland/medical-history-of-british-india huggingface dataset:
84
TABLE I.-- Table showing the quantity of pollution in each sample.
Names of municipalities.
Unfiltered or natural waters.
Filtered waters.
Water taken from pipes.
T o t a l c o l o n i e s p e r c c . o n a g a r a t 3 7 º C .
Lactose fermen-
ters in
V i b r i o s i n 1 0 0 c c .
T r u e c o l i c o m .
T o t a l c o l o n i e s p e r c c . o n a g a r a t 3 7 º C .
Lactose fermen-
ters in
V i b r i o s i n 1 0 0 c c .
T r u e c o l i c o m .
T o t a l c o l o n i e s p e r c c . o n a g a r a t 3 7 º C .
Lactose fermen-
ters in
True col i com.
2 0 c c . 1 0 c c . 5 c c . 1 c c . . 1 c c
. 0 1 c c .
2 0 c c . 1 0 c c . 5 c c . 1 c c . . 1 c c
. 0 1 c c .
2 0 c c . 1 0 c c . 5 c c . 1 c c .
. 1 c c .
A . — R i v e r w a t e r s a n d g a l l e r i e s i n r i v e r s .
Bezwada
155 + + + + - -
580 + + + + + - -
150 +
+
+
+ -
-
Stored
Cocanada
257
- - - - - - - -
840
- - - - - - - -
1,700 +
+
-
-
- - -
2,430 - - - -
-
-
Conjeeveram
+
+ + + - -
36 +
+
+
- -
61 + + + - - - -
Gudiyattarn
3,020 + + + + - - - -
600 + + + + - - - -
350 +
+ +
+ + - -
Kurnool
Countless + + +
+
+ - - -
350 + +
+ - - - - -
1,500 + +
+
+ - - - -
Countless + + + + - - - -
300 +
+
+
- - - -
2,200 +
+ +
+ - - - -
Madura
2,280 + + + + - - - -
47 + +
- -
- - - -
50 +
+
+
+
+
-
28 +
+ +
- - - - -
Nellore
4,020 +
+ +
- - -
-
-
4 0
- - - - -
4,730 + - - - - - -
Tanjore
+
+ + + + - - -
-
1,250 + +
+ -
- - - -
3,200 +
+ + +
-
-
4,900 + + + +
-
-
Trichinopoly
Countless + +
+ - - - - -
Countless + + + - - - -
+
+ +
+ -
- - - -
Tirupati *
520
300 + + + + - - - -
690 + + + + + - -
1,060
-
- - - - - - -
560 + + + + +
-
Average
3,617 +
+
+
+
- - -
-
2,401 +
+ + - - - - -
1,670 + + + - - -
B . — U p l a n d s u r f a c e w a t e r s .
r
Adoni
1,320 + + + + + - - -
620 + + +
- - - - -
1,170 + +
- -
-
3,190 + + +
+
+ + - -
Coonoor
1,150 +
+
+
- - - - -
480 + + +
+
- - -
1,430 + + + + +
- -
290 + + + + - - - -
Madras
—
Red Hills
350
- - - - - - - -
1,500 + + + - - - - -
172
- - - - - - - -
+
+ +
+ - -
Ootacamund
50 +
+
+
- - - - -
12 +
-
- - - - -
50
+
+ - - - - - -
+
+ - - - -
+
+
- - - - - - -
412 + + - - - -
- - - - - - - -
Countless
+ + + + - - - -
187 +
+ + - - - - -
Vellore
1,140
+ + - - - - - -
470 +
+
+
- - - - -
210 + + - - - - - -
1,390 + + + - - - - -
Vizagapatam
Countless + + + + - - - - Countless + + + + -
- - -
300 - - - - - -
Average
2,442 + + - - - - - -
3,697 + + + - - - - -
944
+ +
-
-
-
C . — S p r i n g w a t e r s .
Adoni (spring)
830 + + + + - - -
-
Cuddapah
1,280
+
+ +
+
+
680 + + + + + +
Deep well
Dindigul
53
+
+ + + - - - -
15 + +
-
- - - - -
4
+
+ + - - - -
Gu n t u r
+
3,700
+ +
+ +
2,550 + + + + + - - -
3,320 + + + + + - - +
Average
442 + + + + - - - -
- - - - -
-
- -
1,650 + + + + + - -
* These waters are well waters in the bed of a river.
+ Signifies " not determined."
For the purposes of averages " Countless " is taken to be 10,000.
The various quantities of the sample that showed the presence of foecal bacilli are marked + ; those from which these organisms
wers absent, are marked —.
Report on the Town Water-Supplies of the Madras Presidency
for the Quarter ending 30th September 1912, being Part III
of Appendix IV to the Annual Report of the King Institute
of Preventive Medicine, Madras, for the year 1912.
88
Chemical Analysis.
SAMPLE I.
SAMPLE I I I .
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Colourless and clear.
Smell.
N o n e .
N o n e .
QUANTITATIVE.
Total solids
...
...
...
Parts per 100,000 ...
52.400
51.800
Temporary hardness ...
...
...
... .
Do. ..
20.500
20.500
Permanent hardness ...
...
Do. ..
0.500
0.500
Total hardness
.
...
...
...
Do.
21.000
21.000
Chlorine
...
...
...
Do. ...
4.615
4.615
Ammoniacal nitrogen
...
...
...
Do.
Trace.
T r a c e .
Albuminoid nitrogen
...
Do. ...
T r a c e .
T r a c e .
Oxygen absorbed (Tidy's Process) ...
...
Do.
...
0 . 0 1 0
0.010
Nitric nitrogen
...
...
...
...
Do.
..
0.062
0.050
Q U A L I T A T I V E .
Nitrites
...
...
...
...
...
...
...
...
N i l .
N i l .
Sulphates ...
...
...
..
P r e s e n t .
Present.
Phosphates ..
...
...
...
...
...
...
...
...
N i l .
N i l .
Iron, poisonous metals
...
.
...
...
...
N i l , n i l .
Nil, nil
90
REPORT.
Vellore water is in pretty fair order for this time of the year, the fœcal germs being few in
number, and the numbers of the susceptible class I absent. Filtering the water as at present
carried. out seems a rather useless proceeding, as .there is no improvement apparent. If
anything, the water is worse after filtration. The change from class III to class II in the
water as distributed is rather strange, and the high total count got in the sample from the
Cantonment Railway Station Compound seems to indicate that this section of the pipe requires
flushing out. Chemically the only- bad feature of the water is the large amount of organic
matter with a carbon-nitrogen ratio of 8.5 : 1.
Chemical Analysis,
SAMPLE I. SAMPLE III.
Physical appearances.
Colour and
Transparency.
White and opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
... Parts per 100,000
...
23.000
21.000
Temporary hardness ...
...
...
Do.
..
7.500
7.000
Permanent hardness ...
...
...
Do.
...
1.500
2.000
Total hardness
...
....
...
Do.
...
9 . 0 0 0
9.000
Chlorine
...
...
...
...
Do.
1.420
1.420
Ammoniacal nitrogen
...
...
Do.
...
0.002
0.002
Albuminoid nitrogen ...
...
...
Do,
...
0.030
0.020
Oxygen absorbed ( Tide's Process) ...
Do.
...
0.267
0.171
Nitric nitrogen
...
...
..
Do.
Nil.
N i l .
QUALITATIVE.
Nitrites
...
...
...
...
...
.... ..
Nil.
Nil.
Sulphates
...
...
.
...
...
...
...
...
Present.
Present.
Ph osphates
...
...
...
..
...
...
..
Nil.
Nil.
Iron, poisonous metals
...
...
.„
...
...
...
Nil, nil.
Nil, nil.
91
MADRAS.
WATER SAMPLES TAKEN—10TH AND 11TH JULY 1912.
Remarks .—Both Sholavaram and Maclean's channels were dry when samples were taken. The
supply is constant. There has been about 2.03 inches of rain since last analysis.
Bacteriological Analysis.
SAMPLE I.—FROM TILE BOTTOM OF THE RED HILLS LAKE.
Total colonies per cc. on agar at 37° C.—200.
Nu mb e r . L a c t o s e .
S a c c h a r o s e .
Dul c i t e .
A d o n i t e .
Inul i n.
V o g e s a n d P r o s k .
Indol.
M o t i l i t y .
Group.
Name of Bacilli.
Group and
Remarks.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
...
... ...
1
1 + + + - - - - + III B. 74
...
... Group I, nil.
2 tubes of 10 cc.
...
...
... ...
2
3 "
5 cc.
...
...
...
...
1
2
2 + + + - - - - + III Do.
...
...
„ II, nil.
3 "
...
3
3 + + + - - - - + III Do.
" III, 10.
3 "
.1 cc. ... ... ... ...
...
3
4 + + + - - - - + III Do.
...
..
" IV, nil.
3 "
.01 cc.
...
...
...
... ...
3
5 + + + - - - - + III Do.
Fœcal bacilli present in 60 cc.
No vibrios in 100 cc.
6 + + + - - - - + III Do.
7 + + + - - - - + III Do.
8 + + + - - - - + III Do.
...
... Class I, nil.
9 + + + - - - + + III B. 71...
...
" II, 10.
10 + + + - - - + + III Do.
...
...
" III, nil.
SAMPLE II.—FROM THE SURFACE OF THE RED HILLS LAKE.
Total colonies per cc. on agar at 37° C.—99.
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 III.—TAP IN MALAYAPERUMAL STREET, GEORGETOWN.
Total colonies per cc. on agar at 37° C.—1,430
1 + + + - - - + - III B. Neapolitanus ... Group I, nil.
2 + + + - - - + - III
Do.
" " II, nil.
3 + + + - - - + - III
Do.
...
" III, 9.
4 + + - + - - - - IV B. Gasoformans ...
" IV, 1.
Bile salt lactose, medium.
+ -
5 + + + - - - + - III B. Neapolitanus.
6 + + + - - - + - III
Do.
7 + + + - - - + - III
Do.
1 tube of 20 cc.
...
...
...
...
1
...
8 + + + - - - + - III
Do.
... Class I, nil.
2 tubes of 10 cc.
...
...
...
...
2
...
9 + + + - - - + + III B. 71
...
...
" II, 10.
3 " 5 cc.
...
...
...
...
2
1 10 + + + - - - + - III B. Neapolitanus ...
" III, nil.
3
"
1 cc.
...
...
...
...
2
1
3
" . 1 c c .
...
3
3
" . 0 1 c c .
...
3
Fœcal bacilli in 1 cc. and upwards.
No vibrios in 100 cc.
SAMPLE IV.—TAP NEAR SAIDAPET TOLL-GATE.
Total colonies per cc. on agar at 37° C.—1,440.
1 + + + - - + - + III B. 73
...
... Group I, nil.
2 + + - + - + - - IV B. Lactis ærogenes.
" II, nil.
3 + + - + - + - - IV
Do.
...
" III, 1.
Bile salt lactose, medium.
+
-
4 + + - + - + - - IV
Do.
...
" IV, 9.
5 + + - + - + - - IV
Do.
1 tube of 20 cc.
...
...
...
1
...
6 + + - + - + - - IV
Do.
7 + + - + - + - - IV
Do.
2 tubes of 10 cc.
...
...
...
...
2
...
8 + + - + - + - - IV
Do.
... Class I, nil.
3 " 5 cc.
...
...
...
...
3
...
9 + + - + - + - - IV
Do.
..,
" II, 9.
3
"
1 cc.
...
. . .
2
1
10 + + - + - + - - IV
Do.
...
" III, 1.
3 " . 1 c c .
...
3
3
" .01 cc.
...
...
...
... ...
3
Fœtal bacilli in 1 cc. and upwards.
No vibrios in 100 cc.
27
92
REPORT.
Bacteriologically the water at the head-works continues to be remarkably pure which shows
that so far no surface water has got into the lake. Chemically it is not nearly so good, as the
figures for organic matter are very high and show the undesirable carbon-nitrogen ratio of 1 to 8.
It is not a little surprising to find so few organisms in a water containing so much highly nitro-
genous organic matter. The water as distributed to Georgetown and at Saidapet toll-gate is
very inferior and it would appear as if the pipes required to be flushed out. Both samples from
the distributary system show large total counts and sixty times the number of fœcal germs as is
shown by the lake water.
Chemical Analysis
SAMPLE II
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
Yellowish and hazy.
Yellowish and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
... Parts per 100,000
...
32.000
32.000
Temporary hardness
...
...
...
Do..
8.000
8.000
Permanent hardness
... ... ...
Do ...
0 . 5 0 0
0.500
Total hardness
...
...
...
Do ...
8 . 5 0 0
8.500
Chlorine
...
...
...
...
...
Do ...
6.390
6.390
Ammoniacal nitrogen
... ... ...
Do ...
0 . 0 0 3
0.007
Albuminoid nitrogen
...
...
...
Do ..,
0 . 0 6 7
0.049
Oxygen absorbed (Tidy' s Process) ...
...
Do...
0 . 2 1 0
0.190
Nitric nitrogen
...
...
...
...
Do.
...
Nil.
Nil.
QUALITATIVE.
Ni trites
...
,..
...
... ... ... ... ... ...
Nil.
Nil.
Sulphates ...
...
...
...
... ...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
... ...
...
...
...
Nil.
Nil.
Iron, poisonous metals ... ... ... ... ... ... ...
Nil, nil.
Nil, nil.
94
REPORT.
The water of a flooded river can never show any great degree of bacterial purity, but the
Cauvery water on this occasion shows that the first and most objectionable kind of pollution
has been washed away. Passage through the Infiltration Gallery has brought about some
improvement though the total count is still very high. From this point on, the water gets
steadily worse showing that the pipes must be in a dirty condition. The water of the service
reservoir shows a total count of five and a half times as great as that of the water from the
Infiltration Gallery, and the water drawn from a tap near the Cantonment Railway Station is
ten times as bad as the flooded river water. This is a very bad state of affairs and calls for
immediate action. Chemically the water as distributed is very fair.
Chemical Analysis.
SAMPLE I.
SAMPLE IV.
Physical appearances,
Colour and
Transparency.
Slightly yellowish and
opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
...
... Parts per 100,000
19.000
14.000
Temporary hardness ...
...
...
...
Do.
1.000
4.500
Permanent hardness ...
...
...
...
Do.
3.500
2.500
Total hardness
...
...
...
...
Do.
4.500
7.000
Chlorine
...
...
...
...
...
Do.
0.532
0.710
Ammoniacal nitrogen
...
. . .
Do.
Trace.
Trace.
Albuminoid nitrogen ...
...
...
...
Do.
0.018
0 . 0 0 6
Oxygen absorbed ( Tidy's Process) ...
...
Do.
0.145
0.045
Nitric nitrogen
...
...
...
. . .
Do.
Nil.
Nil.
QUALITATIVE.
Ni trites
...
...
...
...
...
...
...
...
...
Nil.
Nil.
S ulphates
..
...
...
...
...
...
...
...
...
Trace.
Trace.
Phosphates ...
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
. . .
Nil, nil.
Nil, nil.
96
REPORT.
The water of the flooded Coleroon shows a good deal of pollution as was to be expected,
but the more objectionable forms are not present. Passage. through the Infiltration Gallery
has brought about a marked decrease in the foecal germs, but not in the total count. As filtra-
tion can hardly be selective in its action, we must assume that the total count has been reduced
but again augmented by deposits in the post-filtration passages. A good deal of deposition
takes place in distribution and the water as drawn from the taps is very good indeed. Chemi-
cally also the water as distributed is quite satisfactory.
.
Chemical Analysis.
SAMPLE I.
SAMPLE IV .
Physical appearances.
Colour and
Transparency.
Brownish and
opaque.
White and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
Parts per 100,000
. . .
* 71.000
10.000
Temporary hardness
...
...
...
Do.
. . .
1.000
2.000
Permanent hardness
...
...
...
Do.
3.500
3.000
Total hardness
...
...
...
Do.
. . .
4.500
5.000
Chlorine...
...
...
. ..
Do.
. . .
0 . 5 3 2
0.710
Ammoniacal nitrogen
...
...
...
Do.
...
Trace.
Trace.
Albuminoid nitrogen..
Do. Do. .
0.034
0.006
Oxygen absorbed ( Tidy's Process)...
0.227
0.045
Nitric nitrogen
...
...
...
...
Do.
. . .
Nil.
Nil.
QUALITATIVE.
Nitrites
...
...
...
...
.
...
. . .
Nil.
Nil.
S ulphates
...
...
...
...
...
...
...
...
. . .
Trace.
Trace.
Phosphates ...
...
..
..
...
...
...
. . .
Nil.
Nil.
Iron, poisonous metals
...
•
.
.
- •
Nil, nil.
Nil, nil.
* F l o o d w a t e r f u l l o f c l a y e y m a t t e r .
98
Chemical Analysis.
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
27.600
27.600
Temporary hardness
Do.
12.000
12.000
Permanent hardness
Do.
5.000
4.000
Total hardness
Do.
17.000
16.000
Chlorine
Do.
3.195
3.195
Ammoniacal nitrogen
Do.
Trace.
Trace.
Albuminoid nitrogen
Do.
0.002
0.003
Oxygen absorbed (Tidy' s Process)
Do.
0.018
0.018
Nitric nitrogen
Do.
0.037
0.062
QUALITATIVE.
Nitrites
Nil.
Nil.
Sulphates
Present.
Present.
Phosphates
Nil.
Nil.
Iron, poisonous metals
Nil, nil.
Nil, nil.
100
REPORT.
There is a monotonous repetition in the results got with Guntūr water. A very fair water
spoiled in distribution ; Sample IV drawn in the Old Madras Road shows a huge total count and
six hundred times as many fœcal bacilli as the spring water. It is high time that action was
taken to remedy such a state of affairs. Chemically the water is as usual rather hard and with
a good deal of alkaline sulphate, but otherwise fair.
Chemical Analysis.
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 ...
56.000
56.600
Temporary hardness „.
„,
...
..
Do.. . .
16.000
16.000
Permanent hardness ...
...
...
...
Do...
2.000
2.000
Total hardness ...
...
...
...
Do.
...
18.000
18.000
Chlorine
...
...
...
...
...
Do.
. . .
2.130
2.130
Ammoniacal nitrogen ...
...
.„
...
Do.
. . .
Trace.
Trace.
Albuminoid nitrogen
Do.
Trace.
Trace.
Oxygen absorbed (Tidy's Process) ...
...
Do.
...
0 . 0 0 9
0 . 0 0 9
Nitric nitrogen
...
...
...
...
Do.
0.150
0 . 1 7 5
QUALITATIVE.
N itrites
...
...
... ...
... ...
• ..
•••
•••
Nil .
Nil .
Sulphates
...
...
...
...
...
...
...
...
Present.
Present.
Ph osphates ...
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil .
Nil, nil .
102
SAMPLE V.—FROM A TAP IN WESTERN CORNER IN KILCHUPET
ROAD.
N u m b e r . La c t o s e . S a c c h a r o s e . Dul c i t e . Adoni t e.
Inul i n. Vo 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.—2,080.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. ...
...
...
...
1
. .
1 + - - - - - + - I B. Vesiculosus
... Group I, 10.
2 tubes of 10 cc. ...
...
...
...
2
. .
2 + - - - - - + - I
Do.
„
II,
nil.
3
„
5 cc. ...... ...
3
. .
3 + - - - - - + - I
Do.
„
III,
nil.
3
„
1. cc. ...
.....
1
2
4 + -- - - - - + - I
Do.
„
IV,
nil.
3
„
1. cc. ...
...
. . .
3
5 + - - - - - + - I
Do.
3
„
.01 cc. ...
...
...
...
. . .
3
6 + - - - - -
+ - I
Do.
7
+ - -
- - - + - I
D o .
Fœcal bacilli in 5 cc. and upwards.
8 + - -
- - - + - I
Do.
... Class I, nil.
9
+ - -
- - - + - I
Do.
„
II,
nil.
No vibrios in 100 cc.
10
+ -
-
- - - + -
I
Do.
„
III,
10.
REPORT.
There is nothing new which is equivalent to, little that is good, to be said about Adoni water on this occasion.
At this season the water has been considerably the worse than it is this year but it is still very far from good.
The spring water is more impure than the water of the reservoir, but the type of impurity is not quite so
objectionable perhaps. The type of impurity in the water as distributed is worse than that of the tank and as
there is no reduction in the amount the filtration as carried out is rather worse than useless. This year there
are not the huge total counts that were noticed last year but they are still too high. A curious feature is to
be noted in the results from sample V drawn from a tap in the Kilchupet Road. Here we notice a marked
reduction in the fœcal germs but a considerable rise in the total count. This has been noticed in three
analysis out of the five that have been carried out at this season, so it seems to be definitely associated with
this section of the pipe line. The other samples from the distributary system show us that the change is not
due to filtration. To what then? If to pipe action, is pipe action selective ? It would almost seem so.
Chemically as usual the water is loaded with organic matter, but is otherwise fair.
Chemical analysis.
SAMPLE II.
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
Greenish and opaque.
Greenish and opaque.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
... Parts per 100,000
. . .
26.600
23.600
Temporary hardness ...
...
...
...
Do.
...
4.500
4.500
Permanent hardness ...
...
Do.
2.000
2.000
Total hardness...
...
Do.
...
6.500
6.500
Chlorine
...
...
Do.
. . .
1.420
1.420
Ammoniacal nitrogen ...
...
...
...
Do.
. . .
0.007
0.045
Albuminoid nitrogen ...
...
...
...
Do.
...
0.151
0 . 1 2 3
Oxygen absorbed ( Tidy's Process)
...
...
Do.
...
0.509
0.418
Nitric nitrogen
...
...
Do.
...
Trace.
Trace.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
Nil.
Nil.
Sulphates
...
...
..
...
Trace.
Trace.
Phosphates ...
...
...
......
...
N i l .
Nil.
Iron, poisonous metals
...
...
...
...
. . . . . .
Nil, nil.
Nil, nil.
103
CUDDAPAH.
WATER SAMPLES TAKEN—7TH 9 AUGUST 1912.
Remarks .—The Bugga River was dry when samples were taken. There was no water over the
gallery. The supply to the town is intermittent. The sample from the tap
adjoining the Service Reservoir was not taken as there was no flow of water
through the tap owing to the low level of water in the reservoir. There has
been about 4.44 inches of rain since last analysis.
Bacteriological Aralysis.
SAMPLE I.—FOUNTAIN No. 12 IN FRONT OF CUDDAPAH CLUB.
Total colonies per cc. on agar at 37° C.—1,000.
C o l o n y n u mb e r .
L a c t o s e .
S a c c h a r o s e .
Dul c i t e. Adoni t e. I nul i n.
V o g e s a n d P r o s k .
Indol.
Mot i l i t y. Gr oup.
Name of Bacilli.
Group and
Remarks.
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.
,,
II, 2.
3
,,
5 cc.
...
...
...
3
3 + + -
- - - +
- IV Do.
...
,,
II, nil.
3
,,
1 cc.
...
.
...
...
3
-
4
+ + - - - -
+ - IV
Do.
„
IV, 8.
3
,,
. 1 cc.
1
2
5 + + - - - - +
-
A V
Do.
3
,,
.01 cc.
...
••
...
...
•••
3
6 + + -
- - - +
- IV
Do.
7 + + — - - - +
- IV
Do.
Fœcal bacilli in 1 cc. and upwards.
8 + - + - - - + + II B. Coli communise ... Class I, 2.
9
+ - + - - - + + II
Do.
...
„
II, 8.
No vibrios in 100 cc.
10 + + -
- -
- +
- IV B. Coscoroba
...
„ III, nil .
SAMPLE II.— FOUNTAIN No. 55 IN GEDDY BAZAAR ROAD.
1 + - - - - - +
- I B. Vesiculosus
... Group I, 10.
Total colonies per cc. on agar at 37° C.—440.
2 + - -
- - -
+ - I
Dog...
,,
II, nil.
3 + - -
- - -
+ - I
Do.
...
„
III, nil .
+
-
4
+ - -
- - -
+ -
I
Do,
...
,, IV, nil.
Bile salt lactose, medium.
5 + - -
- - -
+ - I
Do.
6
+ - -
- - -
+ -
I
Do.
1 tube of 20 cc.
...
...
...
...
1
..
7 + - -
- - -
+ -
I
Do.
2 tubes of 10 cc.
...
...
..
...
2
8
+ - -
- - -
+ -
I
Do.
... Class I, nil .
3
„
5 cc.
..
...
...
..
2
1
9
+ -
- - -
-
+ -
I
Do.
...
,,
II, nil.
3
„
1 cc.
...
...
..
..
1
2
10 + - -
- - -
+ - I
Do.
...
„ III, 10.
3
,,
.1 cc. ... ... ... ...
..
3
3
„
.01 cc.
...
...
...
...
...
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
REPORT.
The supply on this occasion was very low and samples could not be obtained at the usual points. It
is therefore rather surprising to come across true Coli Communis in one of the samples, as this organism
is exceedingly delicate and rapidly succumbs to natural purifying agencies. Unfortunately under rather
si mi l ar ci r cumst ances l ast year f œcal ger ms of t hi s suscept i bl e cl ass wer e al so obt ai ned. Thi s r at her suggest s
the idea that, in times of restricted supply, water is drawn directly from the headworks and t ĥat the supply
is thereby polluted. If there is anything in this idea the practice should be put a stop to, as it is very
dangerous one. The sample taken in the Geddy Bazaar Road is much better and fairly typical of what we
expect under the weather conditions prevailing. Chemically the water is quite fair.
104
Chemical Analysis.
SAMPLE I.
SAMPLE II.
Physical appearances.
Colour an
Transparency.
White and hazy.
Colourless and
clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
...
Parts per 100,000 ...
...
14.600
14.800
Temporary hardness
...
...
...
Do.
...
6.500
7.000
Permanent hardness ...
...
...
...
...
Do.
...
4.000
3.500
...
Total hardness
...
...
Do.
...
10.500
10.500
Chlorine
...
...
...
...
...
Do.
...
1.420
1.420
Ammoniacal nitrogen
..
...
...
Do.
..
Trace.
Trace.
Albuminoid nitrogen
•••
..
Do.
...
Trace.
Trace.
Oxygen absorbed ( Tidy's Process ) ...
...
...
••
Do.
0.015
0.015
Nitric nitrogen
...
•••
Do.
...
Trace.
Trace.
QUALITATIVE.
..
...
Nitrites
...
Nil.
Nil.
Sulphates
...
...
...
Trace.
Trace.
Phosphates ...
.
Nil.
Nil.
Iron, poisonous metals
..
...
Nil, nil.
Nil, nil.