Farming of CormmlJ. 
447 
Olit'iuicAl Ingredients 
of the 
Soil and Sub-soil. 
Surface Soil 
Pl.-mtation of 
Sir C. lemon's, 
Bart., on 
Mylor Downsi 
Sub-soil 
18 Inches 
below the 
Surface Soil. 
Clay 
from the same 
spot below 
the 
Surface Soil. 
Surface Soil 
from a 
Piece of Waste 
Havlc. 
SlliCfl 311(1 silic60US StllJll • • 
83' 25 
76-50 
72-5 
C3.2C6 
4- 10 
10- 10 
12' 8 
1 0 • 0 1 3 
0^11)01)3.(6 of lime . • • . 
1 '0 
1 "20 
1 ■ 0 
3- 000 
Carbonate of magnesia • • 
O'lo 
0-25 
1" 15 
0'C66 
Sulphate of lime • • ■ • 
0-75 
1-25 
1-0 
1 • 320 
Per and proto-oxides of iron . 
4-50 
5 - 10 
5 '75 
10-310 
Deuto-oxide of iron • • . 
2-nio 
2-25 
3-0 
4-25 
1-000 
2-0 
1 • 15 
0*75 
3 OCO 
Insoluble vegetable matters 
1'58 
0-30 
1-50 
5 030 
0-42 
0-75 
0-47 
Pliospliate of lime 
0-25 
0*010 
Phosphate of magnesia . • 
0-15 
a trace 
0 ( 05 
0-010 
a trace 
1-000 
]Mr. Collins, of Truthan, lias also reclaimed about 120 acres of 
the wastes in the parish of St. Erme, worth now 20s. per acre, 
which would not let at 2s. 6c?. per acre previously. His system 
is to manure the land well with bone for turnips, one-half of 
which is eaten on the land by sheep folded on it — after this, bar- 
ley, seeded out for 2 years, at the end of which time he breaks 
for rape, which is also eaten by sheep, and followed by wheat, 
turnips, barley, &c. Mr. Hawkins, too, of Trewithen, has re- 
claimed about 120 acres of the wastes bordering on Trelyon Com- 
mon, in the parish of St. Stephen (68), chiefly through the agency 
of bone-dust. His system is to break the wastes for turnips, 
manured with bone-dust ; after which oats, and then grass-seeds 
laid down for permanent pasture. One-half of the turnips are 
consumed by sheep folded on the land — and by these means he 
has brought land which would not fetch 2s. per acre, into a rich 
cultivated soil. There are a great many thousands of acres of 
wastes of this character of land in this district. (^See anali/sisGS.) 
We have other descriptions of wastes in different parts of the 
county.* 
* On the serpentine formation we have an immense tract of waste. 
This is decidedly the most unproductive soil in the county, and I should 
hesitate in advising its being cultivated, except in a few places where 
it is intersected by greenstone rocks (29). The whole of this land must 
be thoroughly drained, and would require an immense quantity of lime. 
The disintegrated greenstone and hornblende rocks have been employed 
as a fertilizing mixture for this kind of soil. The difference between this 
and the remains of decayed granite is that the potash of the felspar in the 
