74 Oil the Phosphoric Strata of the Chalk Formation. 
Insoluble silicious matter 
Soluble silica 
Organic matter 
Phosphoric acid 
Carbonic acid 
Lime .... 
Magnesia 
Oxide of iron and alumina 
Tlie 
marl, 
Tlie fossils. 
incluUii 
g iossils. 
. 39 
•59 
7-12 
. 18 
•42 
3 -27 
. 4 
■12 
3 04 
6 
•&9 
33 03 
. 4 
•52 
5^58 
. 9 
11 
46^50 
1 
•64 
traces. 
. 13 
55 
1-96 
97 
84 
100-50 
It has been already stated, that in the layer of rubbly broken-up rock 
upon which the green marl immediately rests, very great quantities of 
a purely white soft substance are interspersed. This substance, both at 
Bentley and at Farnham, frequently assumes the form of the large 
spongoid transition fossds prev iously described ; it is composed of 
Insolul)le silicious matter ..... 16-82 
Soluble silica 
Organic matter . 
Phosphoric acid 
Carbonic acid . 
Lime . . . . 
Magnesia ... 
Oxide of iron and alumina 
12-92 
2-29 
•78 
22-54 
34-68 
1-01 
6-29 
97-33 
After leaving Bentley, in proceeding in a S.W. direction, the phos- 
phoric band may be traced to Froyle, in which ])arish it crosses the 
Southampton road ; it then continues with the same bearing till it crosses 
the river Wey, below Alton, and is traceable, though occasionally much 
obscured by diluvial detritus, to Worldham. Here there is an immense 
longitudinal quarry, about 15 feet in depth, from which, at some remote 
period, thousands of loads have been removed. This quarry has recently 
been reopened by the present proprietor, in consequence of his having 
carted a few loads by way of experiment upon some adjacent pasture- 
land, where the benefit arising from its application was most perceptible, 
especially in developing a good herbage of clover. A small quantity 
■was also taken to another part of the estate about a mile distant, and was 
put upon an arable field; but in this case no advantage accrued. A 
recent examination of this field demonstrated the cause of the failure by 
indicating the presence of the identical phosphoric band in the subsoil 
lying immediately below the spot where the marl was applied. The 
proprietor also mentioned a circumstance which occurred upwards of 
20 years since, when some of the marl from the above pit was carted 
away to a neighbouring farm. The waggon once broke down, and its 
contents were thrown upon an adjoining field and spread very thickly 
over a small space; the spot was noticed during many successive years 
on account of the superiority of the crops which grew there ; yet, 
strange to say, this evidence was practically disregarded ! 
