"Ether theories after the middle of the nineteenth century tended to posit that matter was not, in fact, material at a…"

"The spooky ether was persistent. It took an Einstein to remove it from the Universe. ...Gradually, over the last twen…"

"The physicist's concept of nothing—the vacuum... began as empty space—the void... turned into a stagnant ether throug…"

"The difficult surface conditions met with when light passes from one medium to another, including such subjects as el…"

"I hold in fact (1) That small portions of space are in fact of a nature analogous to little hills on a surface which …"

"Einstein's definition... does not differ in spirit from the definitions in classical science; its sole advantage is t…"

"These last two equations connote that varying electric and magnetic intensities will be propagated through the ether …"

"The most precise experiments have proved the correctness of the Einsteinian laws of mechanics and...Bucherer's experi…"

"Can we represent the electric field by something more like a temperature, say like the displacement of a piece of jel…"

"Under the influence of the elastic forces, the electrons can vibrate about their positions of equilibrium. In doing s…"