CONTENTS 
Paob 
I. America the Old World . . . . 1 
II. The Silurian Beach 29 
III. The Fern Forests of the Carboniferous 
Period 64 
IV. Mountains and tiieir Origin ... 94 
V. The Growth of Continents . . .120 
VI. The Geological Middle Age ... 148 
V II. The Tertiary Age, and its Characteristic 
Animals 181 
VIII. The Formation of Glaciers . . . 208 
IX. Internal Structure and Progression of 
Glaciers 233 
283 
X. 
Fxternal Appearance of Glaciers . 
