Plate Y. 



^ SHOWING 



the Modified Drift of 



Merrimack, CoNToocooK, 

 and Ashue lot Rivers. 



SCALE OF MILES 



Ex planat ion. -^'-^ 



Hdife of Glacial JDnfl -^" / ' 



BoimiuyMhTen lernicei, ' 



Grm el ridoes, orhamci,, «.«. 

 ^Tiicient tifverhedf, i i in.. 

 Jioarls with Iiouies.-^-^^^^ 

 IVt/ures denote JieU/hts 

 mjecl uhove the sea. ^ 



''^^isij 



