Heaviside hat geschrieben:
Perhaps the simplest view to take of the medium which plays
such a necessary part, as the recipient of energy, in this theory, is to
regard it as continuously filling all space, and possessing the mobility
of a fluid rather than the rigidity of a solid. If whatever possess the
property of inertia be matter, then the medium is a form of matter.
But away from ordinary matter it is, for obvious reasons, best to call
it as usual by a separate name, the ether.