Take an egg-shell, and from each end break out a piece as large as the end of this pencil. Extract its contents, and then you will have a perfect representation of Olaf Jansen's earth. The distance from the inside surface to the outside surface, according to him, is about three hundred miles. The center of gravity is not in the center of the earth, but in the center of the shell or crust; therefore, if the thickness of the earth's crust or shell is three hundred miles, the center of gravity is one hundred and fifty miles below the surface. In their log-books Arctic explorers tell us of the dipping of the needle as the vessel sails in regions of the farthest north known. In reality, they are at the curve; on the edge of the shell, where gravity is geometrically increased, and while the electric current seemingly dashes off into space toward the phantom idea of the North Pole, yet this same electric current drops again and continues its course southward along the inside surface of the earth's crust. In the appendix to his work, Captain Sabine gives an account of experiments to determine the acceleration of the pendulum in different latitudes. This appears to have resulted from the joint labor of Peary and Sabine. He says: "The accidental discovery that a pendulum on being removed from Paris to the neighborhood of the equator increased its time of vibration, gave the first step to our present knowledge that the polar axis of the globe is less than the equatorial; that the force of gravity at the surface of the earth increases progressively from the equator toward the poles." According to Olaf Jansen, in the beginning this old world of ours was created solely for the "within" world, where are located the four great rivers--the Euphrates, the Pison, the Gihon and the Hiddekel. These same names of rivers, when applied to streams on the "outside" surface of the earth, are purely traditional from an antiquity beyond the memory of man. On the top of a high mountain, near the fountain-head of these four rivers, Olaf Jansen, the Norseman, claims to have discovered the long-lost "Garden of Eden," the veritable navel of the earth, and to have spent over two years studying and reconnoitering in this marvelous "within" land, exuberant with stupendous plant life and abounding in giant animals; a land where the people live to be centuries old, after the order of Methuselah and other Biblical characters; a region where one-quarter of the "inner" surface is water and three-quarters land; where there are large oceans and many rivers and lakes; where the cities are superlative in construction and magnificence; where modes of transportation are as far in advance of ours as we with our boasted achievements are in advance of the inhabitants of "darkest Africa."