1904 - 5 .] Mr J. Fraser on Electricity based on Bubble Atom. 693 
14. We are now in a state to account for the attractions and 
repulsions existing between electrified and neutral bodies. But 
first induction must be accounted for. Induction, then, is the 
effect of the increase or diminution of ethereal pressure on the 
atoms of bodies (see par. 5). By increase of pressure in the ether 
the atoms contract or tend to contract in size, the orbits of their 
particles are more confined by the increased pressure, and if the 
body be a good conductor, and the inducing body is positive, a 
good deal of the motion of the particles escapes, as it were, to 
where the pressure is least, i.e. to the further end of the body under 
induction, and the end nearest the inducing body becomes negative, 
through its loss of motion, while the end farthest away becomes 
positive through increase of motion received from the end under 
induction. On the other hand, if the inducing body be negative, 
the atoms of the body under induction expand owing to the 
decrease in the pressure, and if it is a good conductor a good 
deal of the motion of the particles at the far end of the body flies 
to the end where pressure is least, and the end nearest the induc- 
ing body becomes positive, while the far end becomes negative. 
Good conduction or bad conduction (of which more hereafter) 
depends on the facility or difficulty with which an increase of 
motion in the particles of the atoms of different substances can be 
transferred from one end of the conducting body tp the other. 
15. Let us now see how repulsion between two positively 
electrified bodies is brought about. The space between them is 
more strongly energised than that outside, hence there would be 
repulsion equivalent to the difference ; but if the electrified bodies 
are good conductors, they would, by mutual induction, drive, as 
it were, the greater part of the electricity to the sides farthest from 
one another, the sides next each other becoming more neutral ; but 
still there would be repulsion, though not so strongly as before. 
If the positive bodies happened to be bad conductors there 
would be less collapse of their atoms under their mutual induction, 
owing to the difficulty of the escape of their electricity, or motion, 
to the sides farthest away from one another, consequently there 
would be proportionately more electricity, or pressure, in the space 
between, and repulsion would be stronger than between good 
conductors. 
