44 



SOIL PHYSICS AND MANAGEMENT 



Fio. 37. Drumlins remnants of former terminal moraines. (U. 8. Geol. Survey.) 



Fia. 38. Drumlin transverse view. By Aldcn. (U. S. Geological Survey.) 



Fio. 39. Adeline eaker, Ogle County, Illinois. Thin esker is over nine miles in length 



(rl. W. Dickeneon.) 



