This Universal Ether is purely hypothetical. It has been called a "necessity of Science"--something assumed for the purpose of explaining or accounting for certain phenomena. It is undemonstrated and unproved--in fact, may truthfully be said to be undemonstrable and unprovable. Some have gone so far as to say that its claimed properties and qualities render it "unthinkable" as well. And yet, Science finds itself compelled to assume that the Ether, or "something like it" exists, or else cease speculating about it. It belongs to the realm of pure theory, and yet, many writers treat it as if it were a positively demonstrated and proven fact. Let us examine into the nature of Science's problem, and her attempted solution, and the trouble arising therefrom. Light travels at the rate of 184,000 miles a second. Remember, that Light and Heat are that which we call by those names only when considered in connection with Substance. According to the theory, Light in the Sun's atmosphere is transformed into a Light-wave of the Ether on its travels to the earth, and only when the "wave" comes in contact with the Substance on the earth's body or atmosphere does it become again transformed into Light as we know it. In its travels through space it meets with no Substance, and has nothing to "turn into light"--consequently Space (between worlds) is in a state of absolute darkness. The same is true of Heat, and inter-world Space is absolutely cold, although passing through it are countless heat-waves of great intensity, which, later on, will be transformed into Heat when they reach the Substance, the earth. The same is true of Electricity and Magnetism.