98
SAMPLE V.—NORTHERN CORNER, FROM A PILLAR FOUNTAIN,
A FEW YARDS OFF THE MUNICIPAL HOSPITAL.
C o l o n y n u m b e r .
Lactose.
S a c c h a r o s e .
Dul ci te. Adoni t e.
Inulin.
V o g e s a n d P r o s k .
Indol.
Mo t i l i t y .
Gr oup.
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37°—Cannot be counted.
Bile salt glucose medium.
+
–
1 tube of 20 cc. of water taken
..
..
1
. 1 + + — +
— + + — IV B. 116
..
.. Group I, 6.
2 tubes of 10 cc.
,,
..
..
2
..
2 + + — + —+ + — IV Do.
..
..
, , II, n i l .
3
„
5 cc.
,,
..
..
3
..
3 +
——————
I B. Mutahilis
..
, ,
III, 2.
3
, ,
1 cc.
,,
3
. . 4 + + + —— ———
I I I
?
, ,
IV, 2.
3
„
.1 cc.
,,
..
..
3
. . 5 + — — — — + —
I B. Vesiculosus.
3 ,,
. 0 1 c c .
,,
..
. .
3
6 + —— ———+ — I
Do.
7 + —— ——— + +
I B. Grunthal
.. Class I, nil.
8 +
—— ——— + +
I
Do.
• .
, , II, n i l .
9 + + + + —+ + — III B. 76
• .
..
, , III, 6.
Fœcal bacilli in .1 cc. and upwards.
10 + —— ——— + —
I B. Vesiculosus
.. Undetermined, 4.
No vibrios in 100 cc.
REPORT.
On this occasion the water from the well to the east of the Headworks is remarkably pure. Chemically
and bacteriologically it leaves little to be desired. With only one excremental germ in 60 cc. it seems
almost invidious to point out that there are too many species present.
The second sample from the west well is also very good though a long way from being so good as the
previous one. Although there are six times as many fœcal germs there is less admixture, but the total
count is very high.
The filtered water is not so good as either of the two former ones. It shows a high total count and
an increased excremental count with a large number of varieties present. It is not at all bad however.
The samples from the distributary system are very much worse and are fairly alike though the low total
count in sample IV is a point in its favour. They both show a large number of fœcal germs and an
undesirable variety of species. Considering the relatively pure state of the water at the headworks, this
state of affairs seems to point to something wanting attention as regards the pipes.
Chemically the waters from the west well and from the general supply are fair though by no means so
good as the water of the east well. They contain more total solids, they are harder and the figure for
oxidised nitrogen is higher. What unoxidised organic matter is left is of animal origin.
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 ..
28.000
44.000
Temporary hardness
.
..
..
..
Do.
..
12.500
21.500
Permanent hardness
..
..
..
..
Do.
..
0.500
0.500
Total hardness ..
..
..
• .
..
Do.
..
13.000
22.000
Chlorine ..
..
..
..
..
..
Do.
..
1.065
1.420
Ammoniacal nitrogen ..
..
..
..
Do. . .
0.003
0.002
Albuminoid nitrogen
..
..
..
..
Do. ..
0 . 0 0 5
0.003
Oxygen absorbed ( Tidy's Process ) ..
..
Do . ..
0 . 0 1 3
0.008
Nitric nitrogen ..
..
.....
..
Do. ..
0 . 0 3 7
0.112
QUALITATIVE.
Nitrites
..
..
..
..
..
..
.. .. ..
Nil.
Nil.
Sulphates
..
..
..
..
..
..
..
..
Present.
Present.
Phosphates
..
..
..
..
..
..
..
..
. .
Nil.
N i l .
Iron, poisonous metals
..
..
..
..
..
..
..
N i l , n i l .
Nil, nil.