CONTENTS 



Preface ......... RICHARD SWANN LULL 



^ Chapter I. The Origin of the Earth . . JOSEPH BARRELL 

 \Chapter II. The Earth's Changing Surface and 



Climate ..... CHARLES SCHUCHERT 



Chapter III. The Origin of Life . LORANDE LOSS WOODRUFF 

 Chapter IV. The Pulse of Life . . RICHARD SWANN LULL 

 Chapter V. Climate and the Evolution of Civilization 



ELLSWORTH HUNTINGTON 



Index . 



PAGE 



v 

 1 



45 



8 



109 



147 



195 



