LIST OF ILLUSTRATIONS 



General map of the southern part of the Beach area Plate XXXVII 



General map of the northern part of the Beach area Plate XXXVIII 



Diagram showing the successions exhibited between the 



plant associations of the Beach area Plate XXXIX 



Wind direction ; sunshine and temperature curves Plate XL 



Diagrams showing precipitation Plate XLI 



Diagram showing snowfall Plate XLII 



Fluctuations of Lake Michigan, 1854-1908 Plate XLIII 



An oak ridge near Kenosha, Wisconsin Plate XLI V, Fig. i 



A beach pool near Waukegan, Illinois Plate XLIV, Fig. 2 



Little dunes of Euphorbia polygonifolia Plate XLV, Fig. i 



Diagrams illustrating the character of the shore south of 



Kenosha, Wisconsin Plate XLV, Fig. 2 



Relic dunes south of Kenosha Plate XLVI, Fig. i 



A Juncus balticus littoralis relic dune Plate XLVI, Fig. 2 



A relic dune partly destroyed by freezing water Plate XLVII, Fig. i 



A Calamovilfa dune Plate XLVII, Fig. 2 



The blufif at Camp Logan, Illinois Plate XLVIII, Fig. i 



Ammophila, Salix glaucophylla, and Populus caudicaiis dunes. Plate XLVIII, Fig. 2 



Section of a Juniperus dune Plate XLIX, Fig. i 



Salix glaucophylla dune in winter Plate XLIX, Fig. 2 



Growth habit of Sporobolus cryptandrus Plate L, Fig. i 



Andropogon scoparius bunch-grass prairie Plate L, Fig. 2 



Growth habit of Petalostemum purpureiiin f. arenariiim Plate LI, Fig. i 



Blowout in Quercus velutina association Plate LI, Fig. 2 



The heath at Beach, Illinois Plate LII, Fig. i 



Blowout in the heath association Plate LII, Fig. 2 



Blowout in the edge of the Quercus velutina association Plate LIII, Fig. i 



Marsh associations in the Dead River, near Beach, Illinois. ...Plate LIII, Fig. 2 



Scirptis amcricanus and Scirpus validus associations Plate LIV, Fig. i 



Swale showing the Cladium association Plate LIV, Fig. 2 



Swale and ridge, showing Calaniagrostis and aspens and 



willows Plate LV, Fig. i 



Prairie showing the Phlox glabeiriina aspect Plate LV, Fig. 2 



Prairie showing Uatris spicata Plate LVI, Fig. i 



The invasion of the prairie into the pines Plate LVI, Fig. 2 



