On the Agricultural Geology of the Weald. 255 
Lower Greensand loses its marks of division, and with this its 
hilly character ; so that in looking- from the Weald towards the 
Chalk there is no marked feature of the ground. It still, however, 
has a slight rise from the clayey beds on either side. This light 
land averages somewhat over half-a-mile in breadth, spreading^ 
more widely at Chalvington and Selmeston. It is here a soft 
sand, yellowish and greenish, and forms a good soil. 
Before leaving the Lower Greensand it may be well to say 
a few words on its water-bearing qualities. Setting aside the 
Atherfield Clay, which, as regards such questions, must be ranked 
with the underlying Weald Clay, we find that, with the exception 
of the inconstant middle division, the beds are highly porous and 
absorbent. The greater part of the rain falling on them sinks 
underground, and is thrown out as springs along the face of the 
escarpment, or in those valleys which either reach down to the 
clay or touch the line of saturation. Hence, with few exceptions, 
due to local causes, water may readily be got by wells. 
The great abundance of the springs in the Hindhead and 
Leith Hill district, and the purity and softness of their v/aters, 
have led to proposals for partially supplying London from this 
source. Many analyses of the waters have been made : and 
the following are selected from those by Professors Graham, 
Miller, and Hofmann.* 
p 
Vellwood, 
11 Mile from 
Haslemere. 
The Punch 
Bowl, near 
the summit 
of Hindhead. 
Barford 
millstream. 
Springs at 
the Moors, 
Gosford 
House. 
Grains ia an Imperial Gallon. 
2 
39 
8-31 
0-86 
0 
59 
0 
40 
2-48 
0-45 
1 
00 
1-17 
0 
30 
Carbonate of Magnesia 
trace. 
0 
27 
0-60 
0-87 
0 
74 
0 
94 
1-40 
0-44 
0 
04 
0-22 
Chloride of Potassium 
0 
03 
0-40 
0 
09 
0 
20 
0-77 
0-93 
0 
10 
0 
72 
Iron, Alumina, and Phosphates 
0- 
02 
0 
08 
0-08 
1-24 
1 
30 
1 
05 
0-95 
Solid residue obtained on cvapo-l 
.5-19 
5-17 
trace. 
1-86 
4-18 
4-34; 
trace. 
2-45 
6-08 
5-C5 
trace. 
2-70 
15-98 
15-75 
trace. 
10-8 
It will cause no surprise that rocks which yield so small a 
* Pari. Eeports, 1851, and ' Quart. Jour. Chem. See.,' vol. iv., p. 375. 
