from the melting of the Quaternary Glacier. 187 
tween the two falls, 31 feet. 
me additional exaggeration is made apparent in the course 
of the following discussions. 
From the facts presented in the section and others connected 
with the Connecticut valley and its terraces, we may obtain ap- 
proximate results with regard to the mean depth of the flooded 
river, its mean width, the mean slope or pitch of the stream, and 
its mean velocity. 
extent of this lower terrace, it appears to be necessary to deduct 
60 to 80 feet from the whole height of the flood in most parts 
