50
SAMPLE IX.-OLD OOTY CISTERN.
Nu mb e r .
Lact os e.
S a c c h a r o s e .
Dul ci t e.
Ad 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 . Mot i l i t y. Group.
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C. - 60.
Bile salt lactose, medium.
+
-
I tube of 20 cc.
...
...
...
...
1
...
1 +
- -
- - - +
-
I B. Vesiculosus.
2 tubes of 10 cc.
. . .
. . .
...
...
2 ...
2 + - -
- - -
+ -
I
Do.
... Group I, 10.
3
,,
5 cc. ...
...
...
...
2
1
3 +
- - - - - + - I
Do.
. . .
,,
II, nil.
3
,,
1 cc. ...
...
...
...
1
2
4 +
- - - - - + -
I
Do.
...
„
III, nil.
3
,,
1 cc. ...
...
...
...
...
3
5 + - - - -
- + -
I
Do.
. . .
, ,
I V ,
n i l .
3
,,
.01 cc.
...
. . .
...
...
...
3
6 +
- - - - - + -
I
Do.
7 + - - - - - + -
I
D o .
8 + - - - - - + -
I
Do.
... Class I, nil.
Fœcal bacilli in 5 cc. and upwards.
9 + - - - - - + -
I
Do.
. . .
, ,
II, nil.
No vibrios in 100 cc.
10 + - - - - -
+ - I
Do.
...
„ III, 10.
REPORT.
Analysis of Qotacamund water-supply on this occasion reveals a very curious result as compared with
that of the previous quarters. It has reached a very high degree of purity probably the highest during the
three years since the commencement of the new analysis, so much so the total organisms present in 1. cc.
of a sample happen to be nil. No excremental organisms of any kind could be isolated in six of the nine
samples analysed; the sample from old Ooty cistern has not reached the state of purity attained by others.
The probable reason for this highly satisfactory state consists in the heavy rainfall continuing for a long
period extending over two quarters.
Chemically the samples are all good.
Chemical Analyses.
SAMPLE I.
SAMPLE II.
Physical appearances.
Colour and
Transparency.
Slightly yellowish
but clear.
White but clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...
...
...
Parts per 100,000 ...
2.600
2.800
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.
...
0.009
0.006
Oxygen absorbed (Tidy's Process)
...
Do.
...
0 . 0 9 6
0.048
Nitric nitrogen
...
. . .
. . .
...
Do.
...
Nil.
Nil.
QUALITATIVE.
Nitrites
...
...
...
. . . ...
...
...
...
...
Nil.
Nil.
sulphates
...
. . .
. . .
...
. . .
...
. . .
. . .
...
Nil.
Nil.
Phosphates ...
...
. . .
. . .
. . .
...
. . .
. . .
...
Nil.
Nil.
Iron, poisonous metals
...
. . .
. . .
...
. . .
. . .
...
Nil, nil.
Nil, nil.
SAMPLE IV.
SAMPLE VI.
Physical appearances.
Colour and
Transparency.
Yellowish and hazy.
Yellowish and hazy.
Smell.
None.
None.
QUANTITATIVE.
Total solids
. . .
. . .
. . .
. . .
...
Parts per 100,000 ...
2.800
3.000
Temporary hardness
...
...
...
Do.
...
Nil.
Nil.
Permanent hardness
. . .
. . .
...
Do.
...
0.500
0.750
Total hardness
...
. . .
...
...
Do.
...
0.500
0.750
Chlorine
. . .
. . .
. . .
...
Do.
...
0.284
0.284
Ammoniacal nitrogen
...
...
...
Do.
...
Trace.
0.004
Albuminoid nitrogen
...
. . .
. . .
Do.
...
0.018
0.022
Oxygen absorbed (Tidy's Process)
. . .
Do.
...
0.128
0.160
Nitric nitrogen
. . .
...
. . .
...
Do.
...
Nil.
Trace.
QUALITATIVE.
Nitrite
. . . ...
. . .
. . .
. . .
...
. . .
. . .
...
Nil. Nil.
Sulphates
. . .
...
. . .
. . .
. . .
...
. . .
. . .
. . .
Nil.
Nil
Phosphates . . .
. . .
. . .
...
. . .
...
. . .
. . .
. . .
Nil.
Nil.
Iron, poisonous metals
. . .
. . .
. . .
...
. . .
. . .
. . .
Nil, nil.
Nil, nil.