XVili CONTENTS 
mountains—The hardness of rocks—Nature’s building 
principle—The self-supporting globe—The lines of the 
earth--Shadow of the earth upon the sky--The arch of 
the sky—Hlorizon lines at sea and on the prairie—The 
curved line and ‘*the line of beauty "’—The law of the 
cirele—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 
vanity of progress—The universal law............. 197 
Cnapter 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- 
ward—Distorted 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 hills—New England ranges—Hills in 
landscape—The levelling down............-.0-.-- 213 
Crapter 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- 
