NationalLibraryOfScotland/medical-history-of-british-india huggingface dataset:
67
COCANADA.
WATER SAMPLES TAKEN—27TH MAY 1912.
Remarks.—The sample was not taken from the Samalkota Canal as there was no water. The
supply is intermittent. There was no rain since last analysis.
Bacteriological Analyses.
SAMPLE I.—SETTLING TANK.
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.—257.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. ...
...
... ...
1 1
No lactose fermenters.
2 tubes of 10 cc. ...
...
...
. . .
2 2
3 , ,
5 cc. ...
...
..
...
...
3
3
3 ,, 1 cc. ...
3
4
3
,,
.1 cc. ... ... ... ..
3
5
3
„
.01 cc. ...
3
6
7
Foecal bacilli not present in 60 cc.
8
No vibrios in 100 cc.
9
10
SAMPLE II.—TAP IN FRONT OF PUMPING STATION.
1
+ +
-
+ -
- -
+
IV
1?.
...
... Group I, nil.
2 + + - + - - - + IV 1 ?.
..
„ II, nil.
3 + + - + - - - + IV
1?.
...
„ III, nil.
Total colonies per cc. on agar at 3 7° C . — 8 4 0 .
4
+ +
-
+
-
+ - +
IV B. 102
...
...
„ IV, 10.
5 + + - + - + - - IV B. Lactis ærogenes.
6
+ +
-
+ - + - +
IV B. 102.
Bile salt lactose, medium
+
-
7 + + - +
-
+ - + IV
Do.
8 + + - + - + - + IV
Do.
...
... Class I, nil.
9
+ +
-
+
-
+ - +
IV
Do.
...
...
,, II. 6.
1 tube of 20 cc. ...
.
1 10 + +
-
+ - - - + IV
?
...
..
„ III, nil.
Undertermined, 4
2 tubes of 10 cc. ...
.
..
1
1
3
,, 5 cc. ...
...
...
...
...
3
3
, , 1 c c .
1
2
3
„
.1 cc. ... ... ..
...
3
3
„ .01 cc. ... ... ...
3
Foecal bacilli in 30 cc. and upwards.
No vibrios in 100 cc.
SAMPLE III.—TAP NEAR PORT RAILWAY STATION.
1 +
- - - - -
+
-
I B. Vesiculosus
... Group I, 10.
2
+ - -
- - - +
-
I
Do.
,, II, nil.
Total colonies per cc. on agar at 37° C.—1,700.
3 + - - - - - +
-
I
Do.
„ III, nil.
4 +
-
- - - - + - I
Do.
...
„ IV, nil.
Bile salt lactose, medium.
+
-
5 + - - - - - + - I
Do.
6
+ -
- - - -
+ -
I
Do.
7 + - -
-
-
-
+ - I
Do.
1 tube of 20 cc.
...
...
1
8 + - - - - - + - I
Do.
... Class I, nil.
2 tubes of 10 cc.
...
...
...
2
...
9 + -
- -
-
-
+
-
I
Do.
,, II, nil.
3
,,
5 cc.
...
...
1
2
10 + -
-
- - - + - I
Do.
„ III, 10.
3
,,
1 cc.
..
3
3
, ,
.1 cc.
..
3
3
,, .01 cc.
......
3
Foecal bacilli in 10 cc. and upwards
No vibrios in 100 cc.
SAMPLE IV.—FOUNTAIN No. 17 IN FRONT OF POLICE STATION.
1 + +
-
+
-
+
- -
IV B. Lactis ærogenes. Group I, nil.
Total colonies per cc. on agar at 37° C.—2,430.
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.
1 tube of 20 cc.
...
1
7 + + - + - + - - IV
Do.
2 tubes of 10 cc. ...
...
...
...
1
1
8 + + - + - + - - IV
Do.
... Class I, nil.
3
,,
5 cc.
...
3
9 + + - + - + - - IV
Do.
...
, , I I ,
9.
10 + +
-
+
- + +
-
IV B. 116
...
...
„ III, nil.
Undetermined, 1
3
,,
1 cc. ...
..
..
3
3
,, .1 cc. ... ... ... ...
1
2
3
,, .01 cc.
...
...
3
Foecal bacilli in 30 cc. and upwards.
No vibrios in 100 cc.
20
68
REPORT.
The water is in an exceedingly satisfactory condition on this occasion. There are very few
fœcal germs and these in the main are of an unobjectionable kind. The one marring feature
is the high total counts, which in these times of drought must be attributed to dust though dust
which has been well sunned and deprived of any organisms likely to be dangerous. Chemically
the figures for oxygen absorbed and for albuminoid nitrogen which stand for organic matter are
on the high side and have a too low carbon-nitrogen ratio for that organic matter to be of
entirely vegetable origin.
Chemical Analyses.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Yellowish and hazy.
Slightly Yellowish but
clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
... Parts per 100,000
...
15.000
14.000
Temporary hardness
...
...
...
Do.
...
4.000
3.000
Permanent hardness
...
...
. . .
Do.
2.000
2.500
Total hardness
...
...
...
Do.
...
6.000
5.500
Chlorine
...
...
...
...
...
Do.
2.130
2.130
Ammoniacal nitrogen
... . . .
. . .
Do.
...
Trace.
Trace.
Albuminoid nitrogen
... . . .
. . .
Do.
...
0.022
0.011
Oxygen absorbed (Tidy' s Process) ...
...
Do.
...
0.174
0.104
Nitric nitrogen
...
...
...
...
Do.
...
Trace.
0.025
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
Nil.
Nil.
Sulphates ...
...
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
Nil, nil.
Nil, nil.
69
CONJEEVERAM.
WATER SAMPLES TAKEN—31sT MAY 1912.
Remarks.— The river-bed of the Vagavati was dry when samples were taken. The supply is
intermittent. There was no rain since last analysis.
Bacteriological Analysis.
SAMPLE I.—TAP IN FRONT OF PUMPING STATION.
Nu mb e r .
Lact ose. 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 nul 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.—Cannot be counted.
Bile salt lactose, medium.
+
-
1 + + - + - + - - IV B. Lactis ærogenes.
Group I, nil.
1 tube of 20 cc.
...
...
1
...
2 + + - - - - - - IV B. 111
...
... ,,
II, nil.
2 tubes of 10 cc
2
...
3 + + - - - - - - IV
Do.
III, nil.
3
,,
5 cc..
3
...
3
,, 1 cc.
...
..
...
3
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, 1.
No vibrios in 100 cc.
10 + + - - - - - - IV
Do.
III, nil.
Undetermined,
9.
SAMPLE II.—TAP ADJOINING THE SERVICE RESERVOIR.
1 + + -
- - - - - IV B. 111
...
... Group I, nil.
2 + + - - - - - - IV
Do.
II, nil.
Total colonies per cc. on agar at 37° C.—36.
3
+ + - - - - - - IV
Do.
...
... „
III, nil.
4 + + - - - - - - IV
Do.
...
... „
IV, 10.
Bile salt lactose, medium.
+
-
5 + + - - - - - - IV
Do.
6 + + - - -
-
- - IV
D o .
1 tube of 20 cc.
...
...
...
..
1
...
7 + + - - - - - - IV
Do.
2 tubes of 10 cc.
..
...
...
...
2
...
8 + + - - - - - - IV
Do.
...
... Class I, nil.
3
.”
5 cc.
,..
...
...
3 .
9 + +
- - - -
- - IV
Do.
II, nil.
10 + + - - - + - - IV B. 112
... „
III, nil.
Undetermined,
10.
3
,,
.1 cc.
. 3
3
,,
.1 cc. ... ... ... ...
...
3
3
„ .01 cc. ... ... ...
...
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
SAMPLE III.—TAP NEAR SEEVARAM TOLL-GATE.
1 + + - + - + - - IV B. Lactis ærogenes. Group I, nil.
2 + + - - - - - - IV B. 111
II, nil .
Total colonies per cc. on agar at 37° C.—61
3 + + - - - - - - IV
Do.
III, nil.
Bile salt lactose, medium.
+
-
4 +
+
- - - - - - IV
Do.
IV, 10.
5 + + - - - + - - IV B. 112.
6 + + - - - - - - IV B. 111.
1 tube of 20 cc.
...
...
..
..
1
...
7 + + - - - + - - IV B. 112.
2 tubes of 10 cc.
...
...
2
...
8 + + - - - + - - IV
Do.
...
... Class I, nil.
3,,
5 cc.
...
..
2
1
9 + + - - - + - - IV
Do,
,,
„
II, 1.
3
,,
1 cc.
...
... ...
3
10 + + - - - + - - IV
Do. ... ...
„
III, nil.
Undetermined,
9.
3 ,, .1 cc.
...
3
3
„
.01 cc. .. ... ... ...
...
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
REPORT.
Whatever it may lack in quantity there is nothing to grumble about in the quality of the Conjeeveram
water at this season. It is not so extraordinarily free from fœcal germs this year, but it does not show
any of the susceptible Class I, which were noted last year. The water is distributed in as good a condition
as it issues from the head works, so the pipes are clean. Chemically the water is a fairly soft good one.
21
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 ...
20.000
20.000
Temporary hardness ...
...
...
...
Do.
...
9.000
7'500
Permanent hardness ...
...
...
...
Do.
...
1.000
1'500
Total hardness
...
...
...
...
Do.
...
10'000
9.000
Chlorine ... ...
...
. . .
. . .
Do.
...
2'485
2.485
Ammouiacal nitrogen ...
...
...
...
Do. •
...
0 . 0 0 3 .
Trace.
Albuminoid nitrogen ...
...
...
...
Do.
...
Trace.
Trace.
Oxygen absorbed (Tidy' s Process) ...
...
Do.
...
0'009
0'009
Nitric nitrogen
...
. . .
. . .
. . .
Do.
...
0'050
0'075
QUALITATIVE.
Nitrites
..
...
...
..
...
...
...
...
...
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
. . . ...
. . .
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
. . .
...
...
Nil, nil.
Nil, nil.
Chemical Analysis.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Slightly yellowish but
clear.
Colourless and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
...
... Parts per 100,000 ..
40.000
40'600
Temporary hardness
...
...
...
. . .
Do
. . .
15'500
15'500
Permanent hardness
...
...
...
...
Do.
. . .
1.500
1'500
Total hardness
...
...
...
• ..
Do.
...
17.000
17'000
Chlorine ...
...
...
...
...
...
Do.
. . .
5.680
5.680
Ammoniacal nitrogen
...
...
Do.
. . .
Trace.
0.006
Albuminoid nitrogen
...
...
...
...
Do.
...
Trace.
0 . 0 0 4
Oxygen absorbed (Tidy's Process)
. . .
... . .
Do.
...
0.019
0.019
Nitric nitrogen
...
. . .
...
...
...
Do.
Trace.
0'025
QUALITATIVE.
Nitrites ... ...
. . .
...
...
...
. . .
...
...
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
,..
.
. .
.
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
...
.Nil, nil.
Nil, nil.
76
SAMPLE V.—DODABETTA PIPE LINE.
Number .
Lactose. Sacchar ose. Dulicite. Adoni te. Inulin.
Voge s a bd Pr os k.
Indol. Motility.
Group
Name of Bacilli.
Group and
Remarks
Tot al col oni es per cc. on agar at 37° C. -12.
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. ... ... ... ...
1
2
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.
8 + + - - - - + - IV
Do. ...
Class I, nil.
Fœcal bacilli in 20 cc and upwards.
9 +
+
- - - - + - IV
Do. ...
„
II, 10.
No vibrios in 100 cc.
10 + + - - - - + - IV
Do. ...
„ III, nil.
SAMPLE VI.—TAP IN FRONT OF TIGER HILL RESERVOIR.
No lactose fermenters
.
Total colonies per cc. on agar at 37° C.—Countless.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. ... ... ...
. . .
1
2 tubes of 10 cc. ... .....
. . .
2
3 „ 5 cc. ... ...
..
3 „ 1 cc. ... ... ....
. . .
. . .
3
3
3 .. .1 cc. ... ...
. . .
3
3 „ .01 cc. ... ... ...
. . .
3
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE VII.—TIGER HILL PIPE LINE.
No lactose fermenters
.
Total colonies per cc. on agar at 37° C.—Cannot be counted.
Bile salt lactose, medium.
+
-
1 tube of 20 cc. ... ,. ... ..
. . .
1
2 tubes of 10 cc. ... ... ... ...
. . .
2
3 „ 5 cc. ... ... ... ...
3 „ 1 cc. ... ... ... ...
. . .
. . .
3
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 MARLIMUND RESERVOIR.
1 + -
- - -
- +
- I B. Vesiculosus . . . Group I, 10.
Total colonies per cc. on agar at 37° C.—187.
2 + - - - -
- + - I
Do.
„ I I ,
n i l
.
3 + - - - -
- + - -
Do.
„ I I I ,
n i l
.
4 + - - - -
- + - I
Do.
„ I V ,
n i l .
Bile salt lactose, medium
+
_-
5 + - - - -
- + - I
Do.
6 + - - - -
- + - I
Do.
7 + - - - -
- + - I
Do.
8 + - - - -
- + - I
Do. ...
Class I, nil.
9 + -- - - -
- + - I
Do....
. . .
- nil
1 tube of 20 cc. ... ... ... ...
1
. . . 10 + - - - -
- + - I
Do.
„ III, 10.
2 tubes of 10 cc. ... ... ... ...
2
. . .
3 „
5 cc. ... ... ... ...
2
1
3
,,
1 cc. ... ... ... ...
. . .
3
3
„.1 cc. ... ... ... ...
. . .
3
3 „
.01 cc. ... ... ... ...
. . .
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
78
TAP IN FRONT OF
TAP IN FRONT OF
DODABETTA UPPER
DODABETTA LOWER
RESERVOIR.
RESERVOIR.
Physical appearances.
Colour and
Transparency.
Yellowish but clear.
Yellowish but clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
... Parts per 100,000
...
3.000
2.400
Temporary hardness ...
...
..
Do.
...
Nil.
Nil.
Permanent hardness ...
...
...
Do.
...
0.500
0.500
Total hardness
...
...
...
...
Do.
0.500
0.500
Chlorine
...
...
...
Do.
0.284
0.284
Ammoniacal nitrogen
...
...
Do.
...
Trace.
Trace.
Albuminoid nitrogen
...
...
...
Do.
0.006
0.002
Oxygen absorbed ( Tidy's Process) ...
...
Do
...
0.109
0.036
Nitric nitrogen
...
...
...
Do.
Nil.
Nil.
QUALITATIVE.
Nitrites
...
......
...
...
...
...
Nil.
Nil.
Sulphates ...
...
...
...
Nil.
Nil.
Phosphates ...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals ..
...
...
.
..
...
.
N i l , n i l .
Nil, nil.
TAP IN FRONT OF
TIGER HILL
RESERVOIR.
TAP IN FRONT
OF MARLIMUND
RESERVOIR.
Colour and
Transparency.
Physical appearances.
Yellowish and
hazy.
Yellowish and
hazy.
Smell.
N o n e .
None.
QUANTITATIVE.
Total solids ...
...
...
...
...
...
...
Parts per 100,000 ...
2.400
3.200
Temporary hardness
...
...
...
...
Do....
N i l
.
Nil.
Permanent hardness
...
...
...
...
...
Do....
0 . 5 0 0
1.000
Total hardness
...
...
...
...
...
...
Do....
0 . 5 0 0
1.000
Chlorine
...
...
...
..
...
...
...
Do.
...
0.319
0.355
Ammoniacal nitrogen
...
...
...
...
Do.
Trace.
0.002
Albuminoid nitrogen
...
...
...
..
...
Do.
...
0.008
0.025
Oxygen absorbed (Tidy's Process) ...
...
...
Do. . . .
0.091
0.173
Nitric nitrogen
...
...
...
...
...
Do.
Nil.
Nil.
QUALITATIVE.
Nitrites
...
...
...
...
...
.....
...
Nil.
Nil.
Sulphates
...
...
...
...
...
......
...
...
Nil.
Nil.
Phosphates ..
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
Nil, nil.
Nil, nil.
.No lactose fermenters.
1
2
3
3
3
3
79
VIZAGAPATAM.
WATER SAMPLES TAKEN-24TH JUNE 1912.
Remarks.—The town supply is intermittent. There has been about 1 . 57 inches of rain since
last analysis. There was no water in tank except a small quantity in pits.
The water from the Experimental trench was pumped to the filter-beds. The
sample from a tap near beach was not taken as there was no flow of water
through the tap owing to the low level of water in the service reservoir.
Bacteriological Analysis.
SAMPLE I.— SAMPLE OF UNFILTERED WATER FROM
MENTAL TRENCH AS IT FALLS OVER THE WEIR NOTCH
ENTERS THE FILTER BEDS.
Total colonies per cc. on agar at 37° C.—Countless.
Bile salt lactose, medium.
THE EXPERI-
BEFORE IT
c.3
O
ca
•-•
!
0
.9]
c/2
o
H
e°) 75;
bA
o
1'1' 3
•
:74
0
H .0
O
0
Name of Bacilli.
Group and
Remarks.
1 tube of 20 cc.
2 tubes of 10 cc.
3
5 cc.
•••
3
1 cc.
•••
3
•1 cc.
3
•01 cc.
2
3
3
1
1
2
2
1 + +
2 + +
3
+
4 + +
5 + +
6 + +
7 + +
IV
IV
IV
IV
IV
IV
IV
B. Coscoroba
Do.
Do.
Do.
I
Do.
Do.
Do.
Group I, nil.
„
II, nil.
„ III, nil.
„
IV, 10.
Fcecal bacilli in 1 cc. and upwards.
8 + +
9 + +
IV
IV
Do.
Do.
Class I, nil.
„
II, 10.
No vibrios in 100 cc.
10 + +
IV
Do.
„ III, nil.
SAMPLE IL—SAMPLE OF WATER FROM FILTER TRENCH (FILTERED
IV
B. Cloaca,
Group I, nil.
WATER).
Total colonies per cc. on agar at 37° C.—Countless (18,400).
2 .1
3
4
IV
IV
1V
Do.
Do.
Do.
,,
If
II, nil.
III, 2.
IV, 8.
5
IV
Do.
Bile salt lactose, medium.
6
IV
Do.
7
4-
IV
Do.
1 tube of 20 cc.
• • •
1
2 tubes of 10 cc. •. •
2
3
5 cc.
3
S
9
10
+
+
+
III
IV
III
B. 67
B. Cloaca)
B. 67
Class
„
I, n it.
II, 2.
III, 8.
3
1 cc.
2
1
3
•1 cc.
1
2
3
.01 cc.
3
Fcecal bacilli in 1 cc. and upwards.
No vibrios in 100 cc.
phi
SAMPLE III.—TAP NEAR RAILWAY STATION.
Total colonies per cc. on agar at 37° C.-300.
Bile salt lactose, medium.
1 tube of 20 co.
2 tubes of 10 cc.
3
5 cc.
•••
•••
3
1 cc.
3
•1 cc.
3
•01 cc.
•••
Fcecal bacilli not present in 60 cc.
No vibrios in 100 cc.
REPORT.
Experimental work was in p, ogress when the samples were taken ; so it would not be fair to criticise the
efficiency of the filters too severely. As a matter of fact it was nil, the water issuing from the filters being
just as bad as that entering them. Both show foetal germs in a cc. and have huge total counts. The water
as distributed shows a truly remarkable improvement, the germs of all kinds having been reduced to at least
a sixtieth of their number at the head-works. The supply was however very small and a sample could not
be obtained at one of the taps usually tested. Chemically there is the remarkable increase in the salinity to
note, though it does not appear to be much higher than in 1911.
24
80
Chemical Analysis.
SAMPLE I.
SAMPLE III.
Physical appearances.
Colour
an Transparency.
White and hazy.
Slightly yellowish
and hazy.
Smell.
None.
None.
QUANTITATIVE
.
Total solids ...
..
... ...
Parts per 100,000 ...
48.000
4 5 . 0 0 0
Temporary hardness
...
...
...
Do.
...
17.000
12.000
Permanent hardness
...
...
Do.
...
8.000
10.000
Total hardness
...
...
...
...
Do.
...
25.000
22.000
Chlorine
...
... ... ...
Do.
...
10.295
14.555
Ammoniacal nitrogen ... ...
Do.
...
0.002
0 . 0 0 2
Albuminoid nitrogen
...
...
Do.
...
0 . 0 0 4
0 . 0 0 9
Oxygen absorbed (Tidy's Process) ...
...
Do.
...
0.038
0.067
Nitric nitrogen
...
...
... ...
Do.
...
Nil.
Nil.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
Nil.
Nil
Sulphates ...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
... ...
...
Nil, nil .
Nil, n i l
8
2
SAMPLE V.—FOUNTAIN No. 12 AT THE END OF BASTION ROAD.
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.—1,500.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
1
.
1 + + - + - + - - IV B. Lactis ærogenes. Group I, nil.
2 tubes of 10 cc.
2
.
3
,,
5 cc.
2
1
2 + + - + - - - - IV B. Gasoformans
„
II, nil,
3 ,, 1 cc.
.
3
3 + + - + - + - - IV B. Lactis ærogenes.
„ III. nil.
, ,
3
„
.1 cc.
.
3
4 + + - + - + - - IV
Do.
.. IV, 10.
3
„
.01 cc.
.
3
5 + + - + - - - - IV B. Gasoformans.
6
+ + - + - - - - IV
Do.
Foecal bacilli in 5 cc. and upwards.
7
+ + -
+ - - - - IV
Do.
8 + + - + - - - - IV
Do.
Class I, nil.
9 + + - + - + - - IV B. Lactis ærogenes
„ II, 10.
No vibrios in 100 cc.
10 + + - + - - - - IV B. Gasoformans
„ III, nil
SAMPLE VI.—TAP IN FRONT OF COLLECTOR'S OFFICE.
1 + + - + - - - - IV B. Gasoformans
Group I, nil.
2 + + - + - - - - IV
Do.
„ II, nil.
Total colonies per cc. on agar at 37º C.—300.
3 + + - + - - - - IV
Do.
III, nil.
4
+
+ - + - - - - IV
Do.
, , I V , 1 0 .
Bile salt lactose, medium.
+
-
5 + + - + - - -
-
IV
Do.
6
+ + - + - - - - IV
Do.
7 + + - + - - - - IV
Do.
1 tube of 20 cc.
1
.
8 +
+
- + - - - - IV
Do.
Class
I, nil
9 + + - + - - - - IV
Do.
, , I I , 1 0 .
2 tubes of 10 cc.
2
.
3
,,
5 cc.
2
.
1
10 + + - + - - - - IV
Do.
„ III, nil.
3
,,
1 cc.
1
2
3
,, .1 cc.
.
3
3
„
.01 cc.
.
3
Foecal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
REPORT.
The results got with the water at the head-works show some anomalous results, and it is not the first
time that this has happened. The canal water shows a large number of foecal and other germs but this is in
no way remarkable in times of flood. The strange feature is that the water of the Southern Settling Tank
which was then being run on to the filter and presumably had been settling for some days, was nearly as bad
and in some aspects worse than the canal water. The water of the Northern Settling Tank which was then
being filled from the canal is already showing marked improvement over the water of the canal. These
unexpected results might be explained by supposing that the samples had been wrongly numbered and had
been interchanged. If there is a pumping record kept, this should be easily settled. The filters are working
efficiently and a water of very fair quality is being distributed to the town. The chemical results tally with
the bacteriological ones.
83
Chemical Analysis.
SAMPLE I .
SAMPLE III.
Physical appearances.
Colour and
Transparency.
Muddy and opaque.
White and opaque.
Smell.
None.
None.
QUANTITATIVE.
Total solids
Parts per 100,000
94.000 *
32.000
Temporary hardness
Do
3.000
7.000
Permanent hardness
Do.
3.000
1.500
Total hardness
Do.
6.000
8.500
Chlorine
Do.
0.710
3.195
Ammoniacal nitrogen
Do.
...
Trace.
Trace.
Albuminoid nitrogen
...
...
...
Do.
0 . 0 2 3
0.015
Oxygen absorbed ( Tidy's Process)
...
D o .
0.324
0.152
Nitric nitrogen
...
...
...
...
Do.
Trace.
Trace.
QUALITATIVE.
Nitrites
......
...
..
..
...
...
...
Nil.
Nil.
Sulphates ...
...
...
...
••
••
...
...
...
Trace.
Present.
Phosphates ...
...
..
...
...
,..
...
...
...
Nil.
Nil.
Iron, poisonous metals ...
...
...
.
...
Nil, nil.
Nil , nil.
SAMPLE II.
SAMPLE V.
Physical appearances.
Colour and
Transparency.
Yellowish and opaque.
Slightly yellowish but
clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
...
...
...
...
... Parts per 100,00 ...
41.000
25.000
Temporary hardness ...
..
...
Do.
...
5.000
6.500
Permanent hardness
...
...
...
Do.
...
1.500
2.000
Total hardness
...
...
..
Do.
6.500
8.500
Chlorine
...
...
Do.
...
2.485
3.195
Ammoniacal nitrogen ...
...
..
...
Do.
...
Trace.
Trace.
Albuminoid nitrogen ...
...
...
...
Do.
0.019
0.003
Oxygen absorbed ( Tidy's Process)
...
...
Do.
...
0.209
0.048
Nitric nitrogen
...
...
...
Do.
Trace.
Trace.
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
...
..
Nil.
Nil.
Sulphates
...
...
...
...
...
...
...
Present.
Present.
Phosphates ...
...
...
...
...
...
...
...
...
Nil.
Nil.
Iron, poisonous metals
...
...
...
...
...
...
Nil , nil .
Nil, nil .
* T h i s w a t e r h a s a b u n d a n c e o f m u d a n d c l a y i n s u s p e n s i o n .
25