ILLUSTRATIONS xiii 



FIG, PAGE 



40. Sketch Map of the Swiss Rivers 291 



41. Diagram in illustration of mountain structure . . 296 



42. Sketch Map of the Aar and its trihutaries . . . 299 



43. River system round Chur, as it used to be . . . 308 



44. River system round Chur, as it is . . . . 309 



45. River system of the Maloya 311 



46. Final slope of a river 317 



47. Do. do. -with a lake . . . .318 



48. Diagrammatic section of a valley (exaggerated). B B, 



rocky basis of a valley ; A A, sedimentary strata ; 



B, ordinary level of river ; C, flood level . . 329 



49. Whitsunday Island. (After Darwin) .... 359 



50. A group of Lunar volcanoes ; Maurolycus, Barocius, 



etc. (After Judd) 380 



51. Orbits of the inner Planets. (After Ball) . . .388 



52. Relative distances of the Planets from the Sun. (After 



Ball) 389 



53. Saturn, with the surrounding series of rings. (After 



Lockyer) 395 



54. The Parallactic Ellipse. (After Ball) . . .413 

 56. Displacement of the hydrogen line in the spectrum of 



Kigel. (After Clarke) . . ... 416 



PLATES 



BuRNHAM Beeches 



Windsor Castle. (From a drawing by 



J. Finnemore) . ... To face page 13 

 Aquatic Vegetation, Rio. (Published 



by Spooner and Co.) ... " " 145 



Tropical Forest, West Indies. (After 



Kingsley) " "179 



Summit op Mont Blanc . . . . " " 203 



