near Mount Washington. 



Fig. 2. 



Fig. 2. Contour map of Huntington and Tuckerman Ravines. Same 

 scale and contour interval as in fig. 1. Made by the author in August, 1912. 



sharp semicircular rim of the ravine, at the foot of Mount 

 Washington. Altogether, the picture that one gets from a 

 modern reading of Hitchcock's report is that of a range whose 

 smooth sides have been grooved or channeled by glaciers. To 

 one accustomed to look to physiographic evidence to support 

 the theory of local glaciers of the Alpine type, it seems 

 strange that Agassiz and Hitchcock, enthusiastic advocates of 

 the local glaciation of the White Mountains, did not seize upon 

 the cirque form of these well-known ravines to more fully sub- 

 stantiate their belief. 



Although close scrutiny of the photographs accompanying 

 the present paper will, I think, satisfy many that no agency 

 except valley glaciers can have produced these peculiar ravines, 

 it is worth while, in view of other possible hypotheses, to con- 

 sider what facts in addition to the trough-like form and semi- 

 circular heads of these ravines must be accounted for. Two 

 facts, in particular, are made clear by the contour maps : 



