EXPLANATION OF PLATE. 



From •'Some typical eskers o1 southern New England," by J. B Woo. I worth, in 

 Bos. Soc. Nat. Hiet., I'roc . vol. 26. 



Fig. 1. A-B=map of crest-line of the Aubnrndale esker. C-D = 

 variaiion in height of crest-line, showing relations between 

 changes in the two lines. E - F = general level of the surround 

 ing country. 



Fig. 2. Diagrams showing relation between probable cross section of' 

 ice-tunnel (A BCD) and present cross-section of esker (EFGi. 



Fig. 3. Section showing relation between esker and esker-tunnel (0), 

 swampy areas or kettle holes (D), hillside kames (E), and resid- 

 ual ice blocks (B) beside the esker. 



