TABLE OF CONTENTS 



CHAPTER I. 



PAGE 



General Introductory Considerations. ... : i 



The Earth as a Whole i 



I. The Atmosphere i 



II. The Hydrosphere 2 



Transgression and Regression 3 



' The Terrestrial Part of the Hydrosphere 4 



III. The Lithosphere 5 



The Mean Sphere Level (6) ; The Continental Block (7) ; Isostacy 

 (9); Thickness of the Earth's Crust (10); Material of the 

 Earth's Crust (12); Deformation of the Earth's jErust (Dias- 



trophism) 6-12 



IV. The Pyrosphere 12 



V. The Centrosphere 13 



Temperature of the Earth's Interior (13); Increase of Density. . 13-15 



VI. The Organic or Biosphere 16 



Interaction of the Spheres 16 



Sculpturing Processes 16 



Definition and Subdivision of Geology ig 



Table of Division of Geological Time 22 



Bibliography 1 22 



A. THE ATMOSPHERE. 



CHAPTER II. 



Constitution, Physical Characteristics, and Movements of the 



Atmosphere; Geologic Work of the Atmosphere 24 



Composition of the Atmosphere 24 



Nitrogen; Oxygen; Argon; Carbon Dioxide; Water Vapor (25); 

 Absolute and Relative Humidity (26) ; Source of Water Vapor 



(27) ; Impurities 25-27 



Optical Characters of the Atmosphere 28 



Light; Diffusion of Daylight 28 



xi 



