Or we can accept Professor Lodge's theory, that aether is made up of positive and negative electricity.
This problem will also be dealt with from the standpoint of our new conception of the aether.
Young assumed different densities for the aether near bodies owing to its being attracted by those bodies (Art. 45).
It has already been pointed out in Art. 29 that aether is matter.
In these operations the elasticity of the aether is called into play.
We shall see that this is so when we come to deal with the density of the aether.
Different bodies, when heated to the same temperature, possess very different powers of agitating the aether: some are.
If aether be matter, therefore, then it must also possess inertia.
That the aether is universal is proved by the phenomena of light.
Let us therefore revert to our hypothesis of the aether as given in Art. 45.
late 14c., "upper regions of space," from Old French ether and directly from Latin aether "the upper pure, bright air," from Greek aither "upper air; bright, purer air; the sky," from aithein "to burn, shine," from PIE root *aidh- "to burn" (see edifice).
In ancient cosmology, the element that filled all space beyond the sphere of the moon, constituting the substance of the stars and planets. Conceived of as a purer form of fire or air, or as a fifth element. From 17c.-19c., it was the scientific word for an assumed "frame of reference" for forces in the universe, perhaps without material properties. The concept was shaken by the Michelson-Morley experiment (1887) and discarded after the Theory of Relativity won acceptance, but before it went it gave rise to the colloquial use of ether for "the radio" (1899).
The name also was bestowed c.1730 (Frobenius; in English by 1757) on a volatile chemical compound known since 14c. for its lightness and lack of color (its anesthetic properties weren't fully established until 1842).
ether e·ther (ē'thər)
Any of a class of organic compounds in which two hydrocarbon groups are linked by an oxygen atom.
An anesthetic ether, especially diethyl ether.