To see if this conception of the Universe is borne out by scientific data, we will now address ourselves more particularly to those fundamental truths which underlie the unity of the Universe. ART. 124. _The Unity of the Universe._--The Unity of the Universe is a dream which has passed before the imagination of many philosophers in by-gone times, and has been a fruitful source of speculation to old-world, as well as more modern philosophers. The researches of such living scientists as Sir William Crookes, Professor J. J. Thomson and others, have, however, made this dream come within the range of practical research and direct experiment. Professor J. J. Thomson believes that it is possible to break off from an atom, a part which is only 1/1000 part of the whole, and these infinitesimal parts he has called corpuscles, which he considers are the carriers of the electric current. If, therefore, it can be philosophically proved that the hypothesis of an atomic, gravitating, and condensing Aether can satisfactorily account for the physical existence of all atoms, and therefore of all matter, the dream of old-world philosophers will be helped on its way to a successful realization. We have already suggested, that nebulae are formed out of the condensation of the electro-magnetic Aether that fills the Universe; and as that nebula, according to the Nebular Hypothesis, ultimately resolves itself into a sun, or planet, or satellite, as the case may be, it follows that the condensation of this electro-magnetic Aether forms the basis of all the various elements, as Hydrogen, Nitrogen, Oxygen and the other seventy elements of which those bodies are composed. Thus the conclusion that we are compelled to come to in regard to the ultimate nature of matter, in its primordial condition, is, that all matter which exists in its varied forms throughout the entire Universe finds its physical origin and source in the universal electro-magnetic Aether, which is itself atomic, and possesses all the essential properties of matter. With the conception of the Aether as advanced in this work, this hypothesis is perfectly philosophical and logical. For the conception is simple, in that it supposes one form of matter to spring out of another form, that is, from an aetherial form to gaseous, in a similar manner to that in which a gaseous form changes into a liquid form, that is, by condensation, or a closer drawing together of the aetherial elastic envelopes that surround each atom; each particular gas, as Hydrogen, Nitrogen, or Oxygen, representing different quantities of aetherial condensations, as will be seen in the next article.