When man first began experimenting, he produced a current by frictional means, and collected the electricity in a bottle or jar.
There always will be, however, some frictional unemployment.
Electric gas lighting, unless it is the frictional system, must not be used on the same fixtures with the electric light.
The flames were arranged so as to form one electrode of a frictional machine.
Thus old and incrusted pipes give twice as great a frictional resistance as new and clean pipes.
This is accomplished by frictional means to indicate the power, and by the use of weights to determine the lift.
frictional Electricity is that produced by the friction of one substance against another.
frictional electricity is electricity suddenly liberated under the effects of the motion, or the mechanical disturbance of bodies.
The arc light is the result of frictional not chemical electricity.
Naturally, the strings are absent, but here is to be found a perfect example of the excitation of frictional vibration.