Longitudinal Magneto Dielectric Waves vs. ElectroMagnetic Waves

[Farmhand]

http://www.tfcbooks.com/tesla/nt_on_ac.htm

Four paragraphs below figure 82.

There is another difference.  The electromagnetic energy travels with the speed of light, but see how the current flows.  At the first moment, this current propagates exactly like the shadow of the moon at the earth's surface.  It starts with infinite velocity from that point, but its speed rapidly diminishes; it flows slower and slower until it reaches the equator, 6,000 miles from the transmitter.  At that point, the current flows with the speed of light -- that is, 300,000 kilometers per second.  But, if you consider the resultant current through the globe along the axis of symmetry of propagation, the resultant current flows continuously with the same velocity of light.

The resultant net propagation velocity is all that counts. Light speed. This is why I tried to tune my coil to have a net propagation velocity of light speed across the oscillating section of the circuit [ ground-secondary-extra coil-elevated terminal ]. 

Cheers

[sparks]

    Voltage appearing on his top terminal is accumulation of force.   Force is not energy.    Like what is the velocity of a sustained electrical field through the vacuum.   What is the velocity of gravity?  What is the velocity of voltage?   What is the velocity of pressure.   Tesla was going after changing energy into force.  I think he did a damn good job of it.