Tesla's ingenious design for the wireless transmission of electricity.
Figure 1. The sending and receiving magnifying transmitters are built essentially the same way. The length and size of the tower and transformer is in a harmonic relationship to the electromagnetic properties of the earth. It has a multipurpose function. Standing k waves generated in resonant relationship to known earth currents could be used as carrier frequencies for transmitting electrical power.
Real scientists have known for centuries that the earth is a giant electromagnet having a North and South magnetic pole. Tesla was using this knowledge to broadcast electricity just like radio and TV waves are broadcast.
The stationary earth is a giant electromagnet and absorbs millions of volts daily in the form of lightning.