THREE NEW PHYSIOGRAPHIC TERMS 



715 



Fig. 5. — A second type of youthful topography, from the Highwood, 111., quad- 

 rangle. Scale, about a mile to the inch. 



term has suggested itself. Superimposed youth hardly seems to be 

 appropriate, for there is here no evidence, which the student who 

 is not yet a master of topographic maps may recognize, that the 

 stream has been superimposed. 



RoLLiN D. Salisbury. 



