The same principle can easily be proved from an electrical standpoint; for if we consider the Aether currents as electric currents, no one would think of suggesting that the intensity of the currents was the same at a distance of several million miles away, as it is near the source of the currents, which in this case may be looked upon as the sun, because at its surface we have the greatest electric potential (Art. 80). So that we see from this reasoning, that not only is there a decreased mass of the Aether at the distance of Venus, compared with Mercury, but there is also a decreased velocity in the rotatory electro-magnetic Aether currents, with the result that the impressed force exerted upon Venus is less than the impressed force exerted upon Mercury, and therefore Venus should move slower through space than Mercury, which is exactly what happens, as Mercury has an orbital velocity of 29 miles per second, while Venus has an orbital velocity of 22 miles per second. As the angular velocity decreases in proportion as the distance increases, it follows that at the respective mean distances not only of Venus, but also of Mars, Jupiter, Saturn, Uranus and Neptune, the capacity of the Aether to exert its impressed force upon the various planets will decrease as the distance increases, with the result that the farther a planet is from the sun, the less force will the Aether currents exert upon that planet, with the result that its orbital velocity should decrease as the distance increases, and this is perfectly in accordance with planetary phenomena. Here, then, we have at once a physical basis for Newton's Second Law of Motion, the results of which are entirely in harmony with observation and experiment, and whose conception fully satisfies all the Rules of Philosophy; as it is simple in conception, fully agrees with observation and experiment, and satisfactorily explains the Second Law of Motion sought to be explained. Thus we find that from the physical standpoint, as well as from the mathematical standpoint, "Change of motion is proportional to the impressed force, and takes place in the direction in which the force is impressed," that is, in a circular direction.