It has been shown that for an aerial two hundred feet in height the corresponding resonating frequency is about one and a quarter million.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming
In making this adjustment of inductance, we are tuning, as it is called, the Leyden jar discharge circuit to the resonating bobbin.
"Hertzian Wave Wireless Telegraphy"
John Ambrose Fleming
It shows a little solenoid arrangement, with one end of the plunger attached to the diaphragm of a speaking or resonating chamber.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin