XVI CONTENTS, 



PLATE 



XVI. The Configuration of the Earth . To face page 211 

 XVII. Orbital Motions of Mercury and 



THE Earth „ „ 223 



XVIII. The Spinning Top . . . . „ „ 255 



WOODCUTS. 



PIG. PAGE 



19. The Action of Astral Gravitation ... 88 



20. The Retardation of the Normal Equatorial 



Velocity of Rotation 236 



21. Normal Velocities and Retardation . . . 242 



22. Meridional and Vertical Circulation op the 



Ocean and Atmosphere 258 



23. Eastward Motion along the Temperate Zone . 262 



