_Mountains are the backbones of continents._ A glance at a map of the world will show that there is evidently a close connection between continents and great mountain-chains. This connection shows itself both in the shapes and general direction of continents. Thus, the long continuous line of mountain-chain which extends from the southern spur of the Andes to the northern end of the Rocky Mountains,--a distance of about nine thousand miles,--corresponds with the general trend of the North American continent, and forms the axis or backbone of that vast tract of land. It seems as if the sea on its western side were kept at bay by this great rocky wall, while on its eastern side the rivers have formed new land. A line of mountains is often the coast line, for the sea cannot overcome it unless subsidence takes place. The backbone of Asia and Europe runs east and west, and the continental area of the Old World follows the same general direction. These are the chief uses of mountains, and the facts which we have brought forward will serve to show how indispensable they are. The following eloquent passage from "Modern Painters" may form a fitting close to the present chapter:-- "And thus those desolate and threatening ranges which in nearly all ages of the world men have looked upon with aversion or with horror, and shrunk back from as if they were haunted by perpetual images of death, are in reality sources of life and happiness, far fuller and more beneficent than all the bright fruitfulness of the plain. The valleys only feed; the mountains feed and guard and strengthen us. We take our ideas of fearfulness and sublimity alternately from the mountains and the sea; but we associate them unjustly. The sea-wave, with all its beneficence, is yet devouring and terrible; but the silent wave of the blue mountain is lifted towards heaven in a stillness of perpetual mercy; and the one surge, unfathomable in its darkness, the other unshaken in its faithfulness, for ever bear the seal of their appointed symbolism:-- "'Thy _righteousness_ is like the great mountains, Thy _judgements_ are a great deep.'" CHAPTER III. SUNSHINE AND STORM ON THE MOUNTAINS. I would entreat your company To see the wonders of the world. _Two Gentlemen of Verona._ "The spirit of the hills is action, that of the lowlands repose."[9] The plains, with their peaceful meadows and meandering streams, might almost be said to be asleep; but the mountains are wide awake. They are emphatically scenes of violent or rapid action. The wind blows more fiercely among the mountain-peaks than over the plains below; heat and cold are more extreme; and every process of change or decay seems quickened. [9] Ruskin, "Modern Painters."