The ether considered and its nature explained. Further proofs
given by Dr. Crookes's work, of its material substance 244
Highest vacuum yet produced. Absorbents cannot absorb
the ether 246
Dr. Crookes's definition of a gas. Not satisfactory. Why 247
A fluid required to pump matter out of a vessel 248
Gas as described by Dr. Crookes would not suit 249
The ether the only elastic fluid we have. The only real gas,
if it is a gas 250
A possible measure of the density of the ether 250
Causes of dark and light zones in high vacua 251
The real conductor of light in a high vacuum 252
How a vacuum tube glows, when electricity passes through it 254
Conclusions arrived at through foregoing discussions 255
Some exhibitions of light explained 256
Gases can be put in motion, but cannot move even themselves 257
The ether shown to be attraction. And primitive matter also 258
All chemical elements evolved from it. Its nature stated 259
Action at a distance explained by the ether and attraction
being one and the same 259