116 
liecords of the Geological Surveg of India. [vol. xiii. 
The water 
The water liere is very limpid with a faint bluisli-green tinge; a very 
slight sulphurous odour is given off. It is reported as 
good to the taste, savoring an apparent metallic flavour ; 
nitrate of silver gives a faint opaline cloud, and tannin produces no change of 
color. No deposit is formed on the boilers at the filature. The temperature 
at the orifice is 33® C. or fil'd®' F. Clots and fluffy masses of rusty-green vege¬ 
table matter soon gather on the surface of the water in the service well or 
receiving basin. 
The well is situated at about 1,880 yards from the seashore, and about 250 
yards from the right bank of the Edoupar, a small tribu- 
tar-y of the northern arm of the Ariankiip or Gingee river, 
a short distance outside and to the south-west of Pondicherry. The nearest 
high ground of older rocks than the alluvial deposits is the low Red Hills plateau 
which commences to'rise from the plain at about 2 miles to the north-west.^ 
The tube has an internal diameter of 5'57 inches, and a total length of 172'79 
feet, being made up of rivetted segments of 8'‘^0 to 
9'14 feet long. 
Table I.—The Savana Boring. 
Locality. 
Tubii)" 
o 
§•2 
W 
'a 
^ . 
O 
J=1 O 
rt't- 
>- o 
Beds. 
iekness of be 
iu meters. 
s 
M a 
o 
50 
be 5» 
Remabks. 
< 
CLi 
Surface soil, say about 
3-00 
3 00 
1 \ 
Coarse sand, with some rounded pebbles, 
quartz, and sub-angular particles of (?) 
basalt. 
I'OO 
4'00 
1st February 1877. 
2 
\ 
Coarse sand, such as is employed in the 
making of lime. 
8'40 
7-40 
3\ 
I 
Black clay with the same sand and 
pebbles mixed in it. 
0-40 
7-80 
As this clay was pierced, 
all the water disappear¬ 
ed from the tube. 
4 
Black clay more compact, scarcely any 
sand, -yearly spangles, fragments of 
shells. 
2'48 
10-28 
B 1 
Quai'tzose sand, stained with black clay, 
.about 
0-38 
10-66 
At 10'28, 1st rise. 
6 
Pure black clay, very plastic 
5 34 
16-00 
At 16-00, an accident. 
V 
Black clay, containing a little sand 
0-58 
16-58 
At IG'58, 2ud rise. 
8 
/ 
Pure black clay, and cl.ay mixed witli fine 
and coarse sand. 
2-42 
10-00 
^ 'J'lie lietglit of tUe surface at tlie well ov'cr mean sea-level is 9 feet. Before the boring the 
water-level in the ordinary wells was 11'48 feet; but now it has risen to 8'85 feet. Ihis increase 
has taken place since the surplus water of the artesian well has been allowed to How into the tank 
situated in the north part of the premises. 
