74
SAMPLE V.—TAP IN WESTERN CORNER IN POLLA STREET.
N u m b e r .
La c t o s e .
S a c c h a r o s e . Dul ci t e. Adoni t e . I n u l i n .
V o g e s a n d P r o s k . I ndol . Mo t i l i t y . Group.
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C.—560.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
...
...
1
. . .
1
+
-
- - - - - -
I B. Mutabilis
... Group I, 7.
2 tubes of 10 cc.
...
...
...
2
. . .
2
+ -
- - - - - -
I
Do.
.. .
„
II,
nil.
3 „ 5 cc. ... ... ... ...
3
...
3
+ -
- - - - - -
I
Do.
...
„ III, nil.
3
„
1 cc.
...
...
3
. . . 4
+ -
- - - - - -
I
Do. ..
.
„ IV, 3.
3
„
.1 cc.
...
...
...
3
. . . 5
+ -
- - - - - -
I
Do. ..
.
3
„ .01 cc. ... ... ... ...
...
3
6
+ -
- - - - - -
I
Do. ..
.
7
+ -
- - - - - -
I
Do.
..
.
Fœcal bacilli in .1 cc. and upwards.
8 + + - - - - + - IV B. Coscoroba
... Class I, nil.
9 + + - - - - + - IV
Do.
...
„ II, 3.
No vibrios in 100 cc.
1 0
+ + - - - - + - IV
Do.
..
.
„ I I I , 7 .
REPORT
The water of both the wells at the Head Works is remarkably good on. this occasion and. as usual the
water of the East Well is a little better than that of the West Well. In both the total counts are too high
however. The sample from the Infiltration Gallery does not maintain its reputation this year, though it would
be an exaggeration to call it bad. As usual the water is greatly spoiled in distribution, showing a ten-fold
number of fœcal germs, but it cannot be said that they are very objectionable in kind. Chemically the water
is good though hard. That of the East Well is better all round than. the West Well or the Gallery water.
Chemical Analysis.
SAMPLE I.
SAMPLE I I .
Physical appearances.
Colour and
Transparency.
Colourless and clear. Colourless and char.
Smell.
None.
None.
QUANTITATIVE.
Total solids ...
...
...... Parts per 100,000
26.000
42.000
Temporary hardness
...
. . .
Do
. ...
11.500
22.000
Permanent hardness
...
Do.
...
1.500
1.000
Total hardness
...
...
. . .
Do.
...
1 3 . 0 0 0
23.000
Chlorine
...
...
...
...
Do.
...
1.065
1.242
Ammoniacal nitrogen
...
...
...
Do.
...
Trace.
0.002
Albuminoid nitrogen
...
...
. . .
Do.
...
0.002
0.002
Oxygen absorbed
( T i d y ' s P r o c e s s
) . . .
Do.
...
0 . 0 1 9
0.010
Nitric nitrogen
...
...
...
...
Do.
...
0 . 0 5 0
0.150
QUALITATIVE.
Nitrites
...
...
...
...
...
...
..
...
...
Nil.
Nil.
Sulphates ...
...
...
..
...
...
...
...
Trace.
Trace.
Phosphates ...
...
...
...
...
...
...
Nil
Nil.
Iron, poisonous metals
...
...
...
..
...
Nil, nil.
Nil, nil.
SAMPLE IV.
Physical appearances.
Colour and
Transparency.
Colourless and clear.
Smell.
None.
QUANTITATIVE.
T o t a l s o l i d s
. . .
. . .
. . .
. . . . . .
Parts per 100,000
40.000
T e m p o r a r y h a r d n e s s
Do.
...
21.000
Permanent hardness
...
...
...
Do.
...
1.000
Total hardness ... . . .
. . .
. . .
Do.
..
.
22.000
Chlorine
...
...
Do.
...
1.242
Ammoniacal nitrogen ...
...
...
Do.
...
Trace.
Albuminoid nitrogen ...
...
...
...
Do.
...
0.002
Oxygen absorbed ( Tidy's Process ) ....
Do.
...
0.010
Nitric nitrogen ...
...
...
. . .
. . .
Do.
...
0.100
QUALITATIVE.
Nitrites
...
...
...
...
...
...
...
Nil.
Sulphates
...
Trace.
Phosphates ...
... ...
Nil.
Iron, poisonous metals
...
...
...
. . .
. . .
Nil, nil.