The =Mountain Ash= (_Pyrus Aucuparia_).—Although valueless, or nearly so, for the quantity of timber it produces, yet, as a hardy, free-growing tree, the mountain ash, or rowan tree, merits attention from planters of exposed seaside land. All along the coast of Great Britain this pretty tree may be found growing luxuriantly, and in such situations affording a great amount of shelter to other less hardy kinds of trees and shrubs. It may be planted without fear of harm, down even to highwater mark, and where the soil is of the poorest description. It is thus one of the most useful of trees for planting as shelter along the roughest and most wind-tortured parts of the coast. The =Hoary Alder= (_Alnus incana_) and the =Common Alder= (_A. glutinosa_) can hardly be excelled for planting in wet portions of cold, wind-swept ground, and in the vicinity of the sea. Both trees grow with the greatest freedom, and are perfectly hardy, standing the first brunt of the saline blasts in a most commendable and praiseworthy manner. I have found it to be a good plan where shelter is wanted on bare coast-tracts, if the quality of soil be at all suitable, to plant the alders pretty closely, and when they have attained to 15 ft. or 20 ft. in height, to cut every alternate one over at ground level. By so doing a number of stout shoots are thrown out early in the following spring, which, as they grow with great rapidity, soon fill up the blanks occasioned by cutting over the young trees. After these have had several years’ growth the remaining half of the original crop should be cut over, and when all have started from the stools a first-class shelter is obtained. Of course, damp portions of the ground should be selected on which to plant the alder. The =English Maple= (_Acer campestre_) can well hold its own as a tree for planting on exposed seaside grounds. It is one of the hardiest trees with which I am acquainted, growing on exposed hillsides and at considerable elevations in a way that seems to attract the attention of every one. Hedges or fringe fences of the native maple have succeeded amazingly in several maritime woods in which it was planted, and in places, too, where the wind blew loud and long. The =Scotch Elm= (_Ulmus montana_) comes next on the list of such trees as I would recommend for the purpose under consideration. It affords plenty of shelter, as it grows freely from the root-stock, sending up numerous suckers, and is so hardy and proof against damage from storms that it may safely be planted in wind-swept districts by the seaside. =Birch= (_Betula alba_) and =Ash= (_Fraxinus excelsior_) are other trees that repeated experiments have proved to be well suited for withstanding the ocean’s blast and for planting in poor, rocky soils.