. The beauties of nature and the wonders of the world we live in. Natural history; Physical geography; Astronomy. 260 THE BEAUTIES OF NATURE chap. approach so near that there is not even room for the river and the road: in that case Nature claims the supremacy, and the road has to be carried in a cutting, or perhaps in a tunnel through the rock. In other cases Nature is not at one with herself. In many-. Fig. 25. — Section of a river valley. The dotted line ehowe a slope or talue of debris. places the debris from the rocks above would reach right across the valley and dam up the stream. Then arises a struggle between rock and river, but the river is always vic- torious in the end ; even if dammed back for a while, it concentrates its forces, rises up the rampart of rock, rushes over trium- phantly, resumes its original course, and gradually carries the enemy away.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Lubbock, John, Sir, 1834-1913. New York, London, Macmillan and Co.