Thus by the rotating Aether currents working in conjunction with the centrifugal and centripetal forces, can be accounted on a physical basis the first of Kepler's Laws in a manner which is strictly philosophical, as the explanation is simple in conception, does not violate experience or experiment, and satisfactorily accounts for, on a physical basis, the law which it is required to explain. If we consider the rotating Aether currents as purely currents of electricity, then exactly the same results follow. For, as we shall see later, Professor Lodge in his _Modern Views of Electricity_ proves that electricity possesses both inertia and momentum, and if electricity possesses these properties, then it also possesses the requisite properties to enable the currents to propel or push any planet around its central body, or a satellite round its primary planet. Therefore the same course of reasoning that applies to the rotating Aether currents, equally applies to the currents of electricity that circulate round each satellite, planet, and sun and star, and by that circulation gives rise to the electro-magnetism associated with each body, while at the same time they supply the kinetic energy which enables any dependent or associated body to be propelled round their controlling centre. ART. 103. _Second Law of Kepler._--According to Kepler's Second Law (Art. 27), we learn that the radius vector, which is the imaginary straight line joining any planet to the sun, describes, or sweeps over, equal areas in equal times. So that, while Kelper's First Law describes the path which a planet takes in revolving round the sun, the Second Law shows how the velocity of that planet varies in different parts of its orbit. While, however, there is a difference in the velocity of any planet at various points in the orbit, there is still a proportion existing between its various velocities, in that equal areas are covered in equal times. We have now to apply the hypothesis of our rotatory Aether currents, in conjunction with the centripetal and centrifugal forces, in order to see whether the Second Law of Kepler can be explained on a physical basis, in the same way that Newton explained it from the mathematical standpoint.