From Art. 92 we learned that the electro-magnetic Aether currents not only circulate round the sun, but they also circulate round each planet. Thus we found there were electro-magnetic Aether currents circulating round each planet, while those planets themselves were circled round the sun by the Aether currents generated by the sun; the planetary Aether currents in their turn propel the satellites round their primary planets. It can easily be seen, therefore, that such phenomena as rest and return of a planet in its journey are physical impossibilities, for either the circulating Aether currents would have to cease circulating, or would have to return upon themselves in some inconceivable manner. Thus there is ever going on this conjoint motion, so to speak, of the sun's aetherial currents which circle all the planets round that body, and the planetary aetherial currents which circle all the satellites round their central body, and it is the effect of the conjoint working of these currents on the planets and satellites to which I wish to call the reader's attention. Let us in starting represent the earth's orbit by a perfect ellipse _A_ _B_ _C_ _D_, with the sun occupying one of the foci _S_ (Fig. 27). We will suppose that the earth is at point _A_ of its orbit and is being circled round the sun with uniform velocity. As it is circled round the sun by the sun's aetherial currents, at the same time its satellite the moon is being circled round the earth by the electro-magnetic Aether currents which circulate round that planet. We will represent the orbit of the moon by part of a smaller circle _D_ _E_ _F_, and suppose the moon to be at point _D_ of that orbit. The mean distance of the moon from the earth is about 240,000 miles, so that the diameter of the orbit is 480,000 miles, therefore the circumference of the orbit is 480,000 × 3.1416, which gives us about 1,500,000 miles. [Illustration: Fig: 27.] That distance is traversed in about 28 days, so that the moon's average velocity in its orbit, as it is circled or pushed round the earth, is about 2200 miles per hour. While, therefore, the moon is travelling 2200 miles, the earth in its journey round the sun has travelled about 64,800 miles in the same time. So that by the time the moon has travelled half its orbit, that is, from _D_ to _F_, which would take about 14 days, the earth has also travelled in its orbit 64,800 × 24 × 14 = 21,772,800 miles, with the result, that instead of the moon arriving at point _F_, which it would do if the earth were stationary, it really arrives at a point about 21,772,800 miles in front of that point.