Take as example the chapter in which he explains electrostatic attractions by pressures and tensions in the dielectric medium.
You see, the dielectric constant of this material isn't constant at all.
A condenser is a device composed of two or more conductors insulated from each other by a medium called the dielectric.
A portion of the charge was absorbed by the dielectric itself.
Of course this limit of resistance varies with every dielectric; but we are now dealing only with air at ordinary pressures.
According to Faraday's theory the particles of air, the dielectric, between A and C play a most important part in the process.
The first difficulty is insulation, for the dielectric must be very thin, else the volume of the condenser is too great.
The following is an example of the division of a charge by the two apparatus, air being the dielectric in both of them.
The dielectric is glass while the conducting surfaces are tin-foil, arranged in a pile of alternate sheets of glass and foil.
As an illustration of the condition of the polarized particles in a dielectric under induction, I may describe an experiment.
A material that conducts (see conduction) electricity poorly or not at all. If a voltage is applied to a dielectric, the atoms in the material arrange themselves in such a way as to oppose the flow of electric current. Glass, wood, and plastic are common dielectrics. (See insulator.)