109
Table showing the degree of pollution in each sample.
Name of Town supply.
UNFILTERED OR NATURAL
WATERS.
FILTERED WATERS.
WATER TAKEN FROM PIPES.
Tota
l lonies
per cc.
o n
agar at
37° c
Lactose fer
menters in
S p o r o g e n e s i n 2 0 c c .
T r u e c o l i c o m .
Total
colonies
per cc.
on
agar at
37° c.
Lactose fer-
menters in
S p o r o g e n e s i n 2 0 c c . T r u e i n c o l i c o m
Total
colonies
per cc.
on
aga at
37º c.
Lactose fer
menters in
S p o r o g e n e s i n 2 0 2 0 c c .
T r u e c o l i c o m
20 cc.
1 0 c c .
5 c c .
1 c c .
. 1cc
. 1 c c .
2 0 c c . 10 cc.
5 c c . 1 c c . . 1 c c . 0 1 c c .
2 0 c c . 1 0 c c .
5 c c .
5 c c . 1 c c . . 1 .
G r o u p A . — R i v e r w a t e r
Canal.
Cocanada
Stored...
Countless. + + + – – – – +
2,830
+ + + + – – – –
1,890
+ + + + + – — –
2,520
+ + + + + – – –
140
+ + + – – – – +
Conjeevaram
... ...
22
+ + + + + – – –
4 +
– – – –
– –
–
122
+
+ + –
– – –
–
82
+
+ – –
– – –
–
Gudiyáttam
...
...
2,520
+ + + + – – – –
3,150
+ + + + + – – –
3,780
+ + + + – – + +
1,630
+ + +
+ + – –
–
Countless. + + + + + – – + Countless. + + – – – – – – Countless. + + – – – – –
–
Kurnool
...
...
, ,
+
+
+
+
+
–
–
–
, ,
+
+ – –
– – –
–
, ,
+
+
+
+
– – – –
,,
–
– — –
– – –
–
1,400
+
+ + + + + – –
–
1,630
Madura
...
...
...
3,150 + + + + + + + +
+ + + + – – –
+ + + +
–
– — +
Nellore
... ...
... Countless
+ + + + + – – –
1,890 + + + – – – – –
640
+ + + –
– – – +
+ + +
–
– – – +
Tanjore
...
...
...
220 + + + + + – — µ
110 + +
+ – – – – –
8 0 +
– – –
– – +
–
320
+
+ – –
– – –
–
Trichinopoly
...
...
3,150
+ +
+ –
+ +
– –
630 + + + -
– – – –
330 + +
– –
– – –
–
32
+
— – –
– – –
–
Tirupati * ... ...
Countless. + + + + + – – – Countless. + + + + + + - —
+ + + + +
– – – –
,,
+
+ + + + +
– –
1,640 + + + + – – – –
6,227
3,300 +
2,704
Average ...
+ + + + + -
– –
+ + +
– – – –
+ + + -
– – 2 / 1 9
5 / 1 9
1,890 + + + + + + + –
210
+
+ – – –
– –
–
960
+ + –
– – – +
–
G r o u p B . — I m p o r t e d s u r f a c e w a t e r s .
Adóni
.. ...
182
– –
–
– + –-
Coonoor
...
...
480 + + +
– –
– –
–
60
+ + + - - - - -
1,890 + + + – – – – –
110
+
+ +
–
– – –
–
Madras
...
...
Countless. + + + + - – + –
+
+ +
+
– – –
–
+ ++ +
+
+
–
–
–
62 + + +
– – +
–
620 ++ + +
– – +
–
250
+
– –
– – –
– –
+
–
– – – – –
–
32
Ootacamund
...
+ + +
+ + – – –
– –
– – – – –
–
+ + + +
– – – –
+ + + – –
–
–
—
+ + –
– – – –
–
72
+
– –
– – – –
84
+ – –
– – – –
–
Vellore
3,150 + + + + – – – –
2,520 + + + + - – –
–
3,780
– – – –
– – –
–
4,310
– – – – – – –
–
Vizagapatam
...
...
470 + + + + + – –
–
160 + + + + – – – –
110 +
+ + – – – –
–
330 + + + – – – – –
+ + +
+ + +
–
–
----- - -
Average ...
1,891
+
+ +
–
–
–
3 / 1 4
–
963
+-
+
+ –
–
– –
–
994 + +
–
– – 4 / 1 4
–
G r o u p C . – W e l l s p r i n g w a t e r
Adóni (spring)
...
280 + + + – – – +
–
2,520 + + + + + + + –
110
– –
– – – –
–
–
Cuddapah ...
...
3,150 +
++ + + + –
320 + + + ++ – –
–
5,040 + + + + + + + –
3,780
+ +
+
+ – –
–
+
Dindigul
...
...
1,890 + + + + + -
-
5,200 + + + + - – –
–
+
Guntúr
140
+ +
+ – –
– +
2,520
+ + + +
– – – –
+ +
+ + – –
–
–
450 + + + + +
– – +
288 + + + + + – –
+
1,924 + +
2 . 7
2,520 + +
1,934
Average ...
+ + + -
4 / 7
+ +
–
– – –
+ + + + – –
–
2 / 6
NOTE.—For the purposes of averages "countless" is taken to be 10,000.
These waters are well waters in the bed of a river.
The various quantities of the sample that showed presence of fœcal bacilli are marked+; those from which such organisms
were absent are marked,–.
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