What exactly is the difference between Tesla Coil and Tesla Tower? What does the tower do? How does it affect the propagation of electric energy?
A Tesla coil can generate voltages of high potential. I have seen videos of how this thing works but never saw a Tesla coil in combination with the tower.
What is the original purpose of Tesla tower?
"In the course of certain investigations (...) I observed that sensitive receiving instruments (...) at times failed to respond when they should have done so, and (...) I discovered it to be due to the character of the electrical waves which were produced in the earth by the lightning discharges and which had nodal regions following at definite distances the shifting source of the disturbances. From data obtained in a large number of observations of the maxima and minima of these waves I found their length to vary approximately from twenty-five to seventy kilometers, and these results and certain theoretical deductions led me to the conclusion that waves of this kind may be propagated in all directions over the globe (...). Recognizing in the existence of these waves an unmistakable evidence that the disturbances created had been conducted from their origin to the most remote portions of the globe and had been thence reflected, I conceived the idea of producing such waves in the earth by artificial means with the object of utilizing them for many useful purposes for which they are or might be found applicable." -- NIKOLA TESLA U.S. PATENT 787,412
Here's how Nikola Tesla began to think about creating lightning discharges artificially. Through observation of the results of measurements and theoretical deductions, he came to conclusion that electric waves created by lightning travel all over the globe.
What do you think about the accuracy and validity of his conslusions? What kind of instruments did he had? Do electric waves really travel throught he Earth as he described?