TLLU.STRATIONS. 



Figure 1. Relation of the segments of an esker to the ice front at the time of their 



formation. Page 180. 

 Figures 2 and 3. Diagrams illustrating a method by which an uneven crestline 



originates. Page 184. 

 Figure 4. Outline map showing the segmentation and relations of the Finland 



eskers. Page 199. 

 Figure 5. Contour map of the Rush esker. Plate XI. 

 Figure 6. Contour map of the Cartersville esker. Page 209. 

 Figure 7. Contour map of the Palmyra esker. Ridge A, Plate XII. 

 Figure 8. Contour map of the Palmyra esker. Ridges B and C. Plate XII. 

 Figure 9. Contour map of the Palmyra esker. Ridge D. Plate XII. 

 Figure 10. Contour map of the esker west of Mendon Pond. PlateXIII. 

 Figure 11. Contour map of the esker east of Mendon Pond. Plate XI \'. 

 Figure 12. Contour map of the Leroy esker. Page 224. 



Figrue 13. Contour map of the northern half of the Eagle Harbor esker. Plate X\'. 

 Figure 14. Contour map of the southern half of the Eagle Harbor esker. Plate X\'I. 

 Figure 15. Contour map of the Holley esker. Page 230. 



IXTRODUCTIOX. 



During the spring of 1910 the writer made a study of several 

 eskers in territory adjacent to Rochester, New York, in connection 

 with graduate work for the degree of Master of Science at the 

 University of Rochester. The results of this study were incor- 

 porated in a paper which was submitted as a Master's thesis. The 

 matter was then dropped until the winter of 1916-17. when the 

 general discussion of the paper was revised and rewritten.' During 

 the past summer (1917) the eskers described in the early ])a]:)er were 



