xviii CONTENTS 



mountains The hardness of rocks Nature's building 

 principle The self-supporting globe The lines of the 

 earthShadow of the earth upon the sky The arch of 

 the sky Horizon lines at sea and on the prairie The 

 curved line and "the line of beauty" The law of the 

 circle Shown in the forms of nature And in the 

 elements and the solar system Circles in physical and 

 intellectual life The uttermost rim of thought The 

 Tanity of progress The universal law 197 



CHAPTER XI. Mountains and Hills. Mountain ridges 

 How the mountains are formed The wrinkle or fold 

 theory The Alps The age of mountains Denudation 

 and erosion The old Appalachians The worn-down 

 mountains Exposed crusts Mountains cut out by water 

 The approach to the mountains from the plains Seen 

 from a distance Mountain-climbing The view The 

 panoramic scene From the high Alps The look down- 

 wardDistorted light and color The look upward The 

 clouds and the sky The mountains from the valley 

 Mountain colors The lower ranges Sky lines Moun- 

 tains at sunrise At noon At sunset The western 

 barrier Looking eastward at sunset Mountain glow at 

 sunset The Alps in storm Storm in the lake-reflection 

 Mountain individuality Changes of form Of color- 

 Influence of atmosphere Light changes The green 

 hills English bills New England ranges Hills in 

 landscape The levelling down 213 



CHAPTER XII. Plains and Lowlands. Impressions 

 received from lines Valley silence Echoes and rever- 

 berations Valley shadows Sunset valleys The age of 

 the valley The brook again Valleys in autumn and 

 in winter The valley home The table-lands In Mon- 



