"We know that electricity acts like an incompressible fluid; that there must be a constant quantity of it in Nature; that it can be neither produced or destroyed... and that electricity and aether phenomenon are identical."
Tesla had acquaintance with Maria Orsic (go figure what that means...)
Anyhow, he was not omniscient, neither infallible !
Then there is that language interface always muddying the waters.
Finally there was times when he simplify so much an explanation, to be understood by the "monkeys", that his speech was borderline with error.
It seems to me that electricity is a higher lever phenomena that emerge from the Aether. Not "identical":
http://www.protonpublishinghouse.com/?p ... etaphysics
Hierarchies and equalities are always fraught with misconceptions, when applied to definitions.
Aether and Electricity are both such huge paradigms, that probably only comparison will even come close.
The Aether is omnipresent and pervades all of space and all of matter (as the fifth state of matter). Attributes like "Incompressible", crystalline, infinite, solid-packed, neural & etc all lend some valid measure; while analogy as a matrix, or an architecture of a matrix, work best for me.
Electricity, wrote large, is more like a common denominator transitioning across all phases of the Aether and along its corresponding axies;
as well as transmitting and transposing charge among the elemental states of:
matter, gravity, light and aether.
That i think is why Electricity manifests in multiple modes such as Volts, Amps, Power, Impedance, Permeability and so on.