19
DINDIGUL.
WATER SAMPLES TAKEN—23 RD MAY 1911.
R E M A R K S — W a t e r i s d e r i v e d f r o m t w o s o u r c e s : ( 1 ) a n i n f i l t r a t i o n g a l l e r y a n d ( 2 ) a d e e p w e l l . I n f i l t r a t i o n g a l l e r y w a s u s e d a s a
source of supply when samples were taken. The supply is intermittent. There has been about 3.05 inches of rain since
last analysis.
Bacteriological Analyses.
S A M P L E I . — T A P I N F R O N T O F P U M P I N G S T A T I O N ( D E E P W E L L . )
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 . 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 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.—600.
Bile salt lactose, medium.
+
–
1 tube of 20 cc.
. . .
. . .
. . .
. . . 1 ... 1 + - - - - - + - I B. Vesiculosus ... Group I, 7.
2 tubes of 10 cc.
... . . .
. . .
. . . 2 ...
3 „ 5 cc.
. . .
. . .
3
. . . 2 + - - - - - + - I
Do.
... „ II, nil.
3 „ 1 cc....
. . .
. . .
. . . 3
3 + - - - - - + - I
Do
... „ III, nil.
3 „
. 1
c c .
. . .
. . .
. . .
. . . . . .
3 4 + - - - - - + - I
Do.
... „ IV, 3.
3 „
. 0 1 c c .
. . .
. . .
. . .
. . . . . .
3 5 + - - - - - + - I
Do.
6 + + - - - - + - VI B. Coscoroba
Fœcal bacilli in 1 cc. and upwards.
7 + + - - - - + - VI
Do.
8 + - - - - - + - I B. Vesiculosus . . . Class I, nil.
9 + - - - - - + - I
Do.
... „ II, 3.
No vibrios in 100 cc.
10 + + - - - - + - IV B. Coscoroba
... „ III, 7.
SAMPLE II—FOUNTAIN No. 19 IN EASTERN END.
1 + + - + - + - - IV B. Lactis ærogenes. Group I, nil.
Total colonies per cc. on agar at 37° C.—50.
...
. . .
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.
...
. . .
. . .
. .
. . . 2 8 + + - + - + - - IV
Do.
Class I, nil.
3 „ 5 cc.
... ...
. . .
. . .
. . . 3 9 + + - + - + - - IV
Do.
, ,
I I , 1 0 .
3 „ 1 cc.
. . .
. . .
. . .
. . .
. . .
3 10 + + - + - + - - IV
Do.
„ III, nil.
3 „
. 1 c c .
. . .
. . .
. . .
. . . .
. . . 3
3 ,
. 0 1
c c .
. . .
. . .
. . .
. . .
. . . 3
Fœcal bacilli in 20 cc. and upwards.
No vibrios in 100 cc.
S A M P L E I I I . — F O U N T A I N N o . 1 0 I N D R O U P A D I A M M E N S T R E E T .
No lactose fermenters
Total colonies per cc. on agar at 37° 0.—100,
Bile salt lactose, medium.
+
-
1 tube of 20 cc. ...
. . .
. . .
. . . . . .
1
2 tubes of 10 cc.
... ... ... ...
2
3 „ 5 cc. ... ... ... ... ...
3
3 „ 1 c c . . . . 3
3 . , , . 1 c c . . . 3
3 „
. 0 1 c c .
. . .
- . . .
. . . ...
3
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
REPORT.
Bacteriologically the water distributed to the town keeps up its high standard of purity. The low bae-
t e r i a l c o u n t s i n t h e w a t e r f r o m t h e d i s t r i b u t a r y s y s t e m a s c o m p a r e d w i t h t h a t o f t h e s a m p l e c o l l e c t e d f r o m t h e
t a p i n f r o n t o f t h e p u m p i n g s t a t i o n o f t h e w e l l p o i n t s t o a m i x e d s o u r c e , t h e w a t e r f r o m t h e i n f i l t r a t i o n g a l l e r y
p r o b a b l y b e i n g o f a m u c h p u r e r q u a l i t y .
Chemically the water is much the same as usual, very hard and saline but otherwise fair.