. The beauties of nature and the wonders of the world we live in. Natural history; Physical geography; Astronomy. 308 THE BEAUTIES OF NATURE The Schyn also gradually worked its way upwards from Thusis till it succeeded in sapping the Albula, and carried it down the .^actua. Fig. 43. — Biver syBtem round Chur, as it used to be. valley to join the Vorder Rhine near Thusis. In what is now the main valley of the Rhine above' Chur another stream ate its way back, and eventually tapped the main river. 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.