227 
Lincolnshire, Leicestershire, and Gloucestershire. These 
examples are sufficiently numerous to prove that a soil with 
less aluminous earth than 5 per cent, will not produce good 
grass; hut it may nevertheless be possible that soils contain- 
ing 10 or 11, or even 12 per cent, upon very dry subsoils, or 
that certain sandy soils with less alumina than 5 per cent, on 
moist or retentive subsoils, may have the same capability. 
Yet in Sinclair's experiments, neither the tenacious clay with 
13.7, nor the clayey loam which contained 14.5, was pos- 
sessed of this power, but the grasses degenerated upon them 
equally as much as upon the siliceous sandy soils. 
The quantity of sand in some of the above specimens 
varies from 9 in the banks of the Avon soil, and 23 in the 
Arksey soil, to 69 per cent, in the Wantage soil. The 
quantity of carbonate of lime also varies from none, as at 
Endsleigh, and 5 per cent, as in Sinclair's rich black clayey, 
to 57 in the banks of the Avon soil : so that the quantity of 
sand or lime is indefinite in the rich grazing pastures. Of 
course the above rule can only apply to soils which are of 
sufficient depth, do not rest upon a wet subsoil, and which do 
not super-abound in peaty earth.* 
Chemical Analysis. 
Water of absorption 5.5 
Matter soluble in water. \ ^^^P^^*^ ^^""^ 
I Chloride of Sodium 0. 1 
Siliceous Sand, insoluble in nitric and sulphuric acids 54 
Alumina 7 
Oxide of Iron 7.7 
Carbonate of Lime 15 
Carbonate of Magnesia 7 
Phosphate of Lime 0,6 
Potash 2.1 
Loss 0.6 
100 
* Synopsis of soils producing the superior perennial grasses : — 
Sand. Carh.Lime. Alumina. 
Sinclair's clayey Loam ) (neither of which J 47 2 14 5 
Ditto tenacious clay i would produce them) \ 39 6 13.7 
