. The beauties of nature and the wonders of the world we live in. Natural history; Physical geography; Astronomy. RIVERS AND LAKES 311 indicates this; they seem as if they regretted the unwelcome change, and yearned to rejoin their old companions. Moreover, as rivers are continually cutting back their valleys they m;ist of course sometimes meet. In these cases when the valleys are at different levels the lower rivers have drained the upper ones, and left dry, deserted valleys. In other cases, especially in flatter dis- tricts, we have bifurca- tions, as, for instance^ at Sargans, and several of the Italian lakes. Every one must have been struck by the peculiar bifurcation of the Lakes, of Como and Lugano, while a very slight depression would connect Kg. 45.-R^er system of the the Lake Varese with the *'°^''" Maggiore, and give it also a double southern end.. 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.