236 NICHOLS: THE VEGETATION OF CONNECTICUT 
Fic. 1. Diagrams showing various stages in the development of a river. 
Tue Lire History or A RIVER 
Various stages in the life history of a river are graphically 
represented in Fic. 1. In a young stream the current is swift an 
wears away the floor and sides of its channel. Vertical erostom, 
