"Whether space is a mere geometrical abstraction, or whether it has definite physical properties which can be investigated, is a question which in one form or another has often been debated. As to the parts which are occupied by matter, that is by a substance which appeals to the senses, there has never been any doubt; and the whole of science may be said to be an investigation of the properties of matter. But from time to time attention has been directed to the intervening portions of space from which sensible matter is absent; and this also has physical properties, of which the complete investigation has hardly begun.

"These physical properties do not appeal directly to the senses, and are therefore comparatively obscure; but there is now no doubt of their existence; even among those who still prefer to use the term space. But a space endowed with physical properties is more than a geometrical abstraction, and is most conveniently thought of as a substantial reality, to which therefore some other name is appropriate. The term used is unimportant, but long ago the term ETHER was invented; it was adopted by Isaac Newton, and is good enough for us. The term ether therefore [61] connotes a genuine entity filling all space, without any break or cavity anywhere, the one omnipresent physical reality, of which there is a growing tendency to perceive that everything in the material universe consists; matter itself being in all probability one of its modifications...

"Thus an ether is necessary for the purpose of transmitting what is called gravitational force between one piece of matter and another, and for the still more important and universal purpose of transmitting waves of radiation between one piece of matter and another however small and distant they be...

"The properties of the ether are not likely to be expressible in terms of matter; but, as we have no better clue, we must proceed by analogy, and we may apologetically speak of the elasticity and density of the ether as representing things which, if it were matter, would be called by those names. What these terms really express we have not yet fathomed; but if, as is now regarded as very probable, atomic matter is a structure in ether, there is every reason for saying that the ether must in some sense be far denser than any known material substance...

"Matter therefore is comparatively a gossamer structure, subsisting in a very substantial medium..."
- Encyclopedia Britannica, 13th Edition: Article: Ether.

"Whence, I ask if it be unworthy of a philosopher to inquire of a philosopher if there be not in nature an incorporeal substance, which, while it can impress on any body all the qualities of body, or at least most [62] of them, such as motion, figure, position of parts, etc... would be further able, since it is almost certain that this substance removes and stops bodies, to add whatever is involved in such motion, that is, it can unite, divide, scatter, bind, form the small parts, order the forms, set in circular motion those which are disposed for it, or move them in any way whatever, arrest their circular motion, and do such similar further things with them as are necessary to produce according to your principles light, colors, and the other objects of the senses... Finally, incorporeal substance having the marvelous power of cohering and dissipating matter, of combining it, dividing it, thrusting it forth and at the same time retaining control of it, by mere application of itself without bonds, without hooks, without projections or other instruments; does it not appear probable that it can enter once more in itself, since there is no impenetrability to frustrate it, and expand itself again, and the like."

In discussing Henry More, Dr. Burtt goes on to say: "In this passage More extends his reasoning from the conclusion of an incorporeal substance in human beings to the assumption of a similar and greater incorporeal substance in nature as a whole, for he was convinced that the facts of science showed nature to be no more a simple machine than is a human being."
- Burtt. Edwin Arthur, Ph.D., Metaphysical Foundations of Modern Physical Science, pp. 131-132.

Sir Oliver Lodge, though often criticized for his views as to communication between the living and the dead, is, in matters of pure science, in the front rank of this age. He says:

"What about the Ether which holds the atoms together, the welding ether which is essential to the characteristic configuration of a body - which is as essential as the matter itself?

"We do not usually attend to the ether aspect of a body; we have no sense organ for its appreciation, we only directly apprehend matter. Matter we apprehend clearly when young children, but as we grow up we infer the Ether, too, or some of us do. We know that a body of characteristic shape, or indeed of any definite shape, cannot exist without the forces of cohesion - cannot exist therefore without the Ether; - meaning by the Ether now, not the whole, but the unmaterialized part of it, the part which is the region of strain, the receptacle of potential energy, the substance in which the atoms of matter are embedded. Not only is there a matter body, there is also an ether body: the two are coexistent."
- Lodge, Sir Oliver, Ether and Reality, pp. 161, 162.

He takes up the same subject again in an article which appeared in The Hibbert Journal and presents some most interesting and suggestive conclusions, as follows:

"Light is an affection of the ether. Light is to ether as sound is to matter... Subject to all the laws of [65] time and space, fully amenable to the laws of energy, largely the source of terrestrial energy, governing all the manifestations of physical forces, at the root of elasticity and tenacity and every other static property of matter, the ether is just beginning to take its rightful place in the scheme of physics:...

"Electric charges, composed of modified ether, are likely to prove to be the cosmic building material... There is the great bulk of undifferentiated ether, the entity which fills all space and in which everything material occurs. A duality runs through the scheme of physics - matter and ether - .

"All kinetic energy belongs to what we call matter, whether in the atomic or the corpuscular form; movement or locomotion is its characteristic. All static energy belongs to the ether, the unmodified and universal ether; its characteristics are strain and stress. Energy is always passing to and fro from one to the other - from ether to matter or vice versa - and in this passage is all work done.

"Now, the probability is that every sensible object has both a material and an etheric counterpart. One side only are we sensibly aware of, the other we have to infer. But the difficulty of perceiving this other side - the necessity for indirect inference - depends essentially and entirely on the nature of our sense organs, which tell us of matter and do not tell us of ether. Yet one is as real and substantial as the other, and their fundamental joint quality is coexistence and interaction. Not interaction everywhere and always, for there are plenty of regions without matter - though there is no region without ether; but the potentiality of interaction, and often the conspicuous reality of it, everywhere prevails and constitutes the whole of our purely mundane experience." [66]