Ether

Ether, a subtle element presumed to pervade all interstellar space, vibrations in which are assumed to account for the transmission of light and all radiant energy.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Ether * Etheredge, Sir George
Estrades, Count d'
Estremadura
Etéocles
Eternal City
Eternities, The Conflux of
Ethelbert
Etheldreda
Ethelred I.
Ethelred II.
Ether
Ether
Etheredge, Sir George
Ethics
Ethics of Dust, The
Ethiopia
Ethnology
Étienne, St.
Etive
Etna
Eton
Être Suprême