Even the hypothetical ether, held as the interplanetary medium of light in the undulatory theory, can be discarded on the einsteinian grounds that the geometrical properties of space render the theory of ether unnecessary.
"Autobiography of a YOGI"
Paramhansa Yogananda
How simple her reply, how einsteinian!
"Autobiography of a YOGI"
Paramhansa Yogananda
But that minute fraction of a per cent was enough to show that the known universe was not totally einsteinian.
"Psichopath"
Gordon Randall Garrett