308 



THE BEAUTIES OF NATURE 



The Schyn also gradually worked its way 

 upwards from Tliusis till it succeeded in 

 sapping the Albula, and carried it down the 



.Jaclua 



Fig. 43. — River system 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 



