xii ILLUSTRATIONS 



FIG. PAGE 



20. Glacier of the Blumlis Alp. (After Eeclus) . . 228 



21. Cotopaxi. (After Judd) . ... 237 



22. Lava Stream. (After Judd) .... 239 



23. Stromboli, viewed from the north-west, April 1874. 



(After Judd) .... . .242 



24. Upper Valley of St. Gotthard 257 



2-5. Section of a river valley. The dotted line shows a 



slope or talus of debris . . ... 260 



26. Valley of the Rhone, with the waterfall of Sallenohes, 



showing a talus of debris . ... 261 



27. Section across a valley. A, present river valley ; B, 



old river terrace .... 262 



28. Diagram of an Alpine valley, showing a river cone. 



Front view .... . .263 



29. Diagram of an Alpine valley, showing a river cone. 



Lateral view 265 



30. Map of the Valais near Sion . ... 266 



31. View in the Rhone Valley, showing a lateral cone . 267 



32. Do. showing the slope of a 

 river cone ... .... 268 



33. Shore of the Lake of Geneva, near Vevey . . . 269 



34. View in the district of the Broads, Norfolk . . 271 



35. Delta of the Po . . 273 



36. Do. Mississippi 274 



37. Map of the Lake District . . . . 281 



38. Section of the Weald of Kent, o, a, Upper Cretan 



ceous strata, chiefly Chalk, forming the North and 

 South Downs; 6, 6, Escarpment of Lower Green- 

 sand, with a valley between it and the Chalk ; 

 c, c. Weald Clay, forming plains ; d, Hills formed 

 of Hastings Sand and Clay. The Chalk, etc., once 

 spread across the country, as shown in the dotted 

 lines . . 283 



39. Map of the Weald of Kent 284 



