The Giant Arborvitæ (_Thuja gigantea_) is peculiarly suitable for planting in chalky soils: and the Lebanon Cedar (_Cedrus Libani_) is never found in greater perfection than when growing in the chalk with a fair depth of loam atop. _Wellingtonia gigantea_ also does well. (3) =Gravelly and Sandy Soils.=—The Corsican pine is an excellent tree for planting on gravelly soils, and some of the largest and finest specimens in this country are growing in a disused gravel-pit, and this may also be said of the Douglas fir (_Pseudothuga Douglasii_). The Scotch pine is well known to be one of the best conifers for planting in gravelly soils, where it reproduces itself in great numbers, when the conditions of growth are at all favourable. _Pinus Pinaster_, the cluster pine, is, perhaps, one of the most valuable conifers for planting either in gravelly or sandy soils. The great value of the tree in reclaiming sandy tracts, both at home and abroad, has been so often described that further reference here is not required. The Aleppo pine is a good companion to the Pinaster, and grows with great freedom in a sandy or gravelly soil, within the influence of the sea. Gravelly soil also suits the Weymouth pine, on which it produces a fair quantity of very resinous timber. Both the beech and oak produce a large volume of timber on poor gravelly and sandy soils. (4) =Clay Soils.=—The soil here referred to is genuine clay, devoid of stones, and without a particle of sand or loam in it. It occurred on the slopes, and for some considerable distance along the sides of one of the park roads on an estate in England. This is recorded simply to show what species of trees are best able to succeed when planted in pure clay. The pits, in this case, it may be well to mention, were dug and the soil thrown loosely up for a month previous to planting, but no soil was added to the stiff clay. Nearly one hundred kinds of trees and shrubs were used, but out of all these not more than eight are doing well, the others having gradually died out, or become so rusty and miserable looking that their removal was compulsory. First among the trees that have succeeded is the giant arborvitæ (_Thuja gigantea_), which seems to revel in what is generally considered the most unkindly of soils. _Cryptomeria japonica_ has also done well, but the trees of this kind, though bushy and well-furnished, have grown at a comparatively slow rate.