CHAPTER I.

Of Physical Geography—Position of the Earth in the Solar System— Distance from the Sun—Civil Year—Inclination of Terrestrial Orbit—Mass of the Sun—Distance of the Moon—Figure and Density of the Earth from the Motions of the Moon—Figure of the Earth from Arcs of the Meridian—From Oscillations of Pendulum—Local Disturbances—Mean Density of the Earth—Known Depth below its Surface—Outline of Geology PAGE 13