The larger part of the Columbia Valley west of the Cascade Mountains is, in its natural state, densely timbered. Here are found "the continuous woods where rolls the Oregon and hears no sound but his own dashings." These great fir, spruce, cedar, and pine forests, extending a thousand miles along the Pacific Coast from Central California to the Straits of Fuca (and indeed they continue, though the trees gradually diminish in size, for nearly another thousand miles up the Alaska coast), constitute the world's largest timber supply. The demands upon it have been tremendous during the past twenty years, and the stately growths of centuries have vanished largely from all places in the near vicinity of shipping points. Yet one can still find primeval woods where the coronals of green are borne three hundred feet above the damp and perfumed earth, and where the pillars of the wood sustain so continuous a canopy of foliage that the sunlight is stopped or filters through only in pale and watery rays. Hence all manner of vines and shrubs grow with almost tropic profusion, though with weak and straggling stems. Throughout the entire Pacific North-west the soil is of extraordinary fertility. It is largely of volcanic dust as fine as flour and seems to contain the constituents of plant life in inexhaustible abundance. Even in the arid belts of Eastern Oregon, where to the eye of the stranger the appearance is of a hopeless waste, those same elements of plant food exist, and with water every manner of tree or vine or flower bursts quickly into perfect life.