Another unsung hero of electrotherapeutics was the late Dr. Strong. He was an eclectic and metaphysician who lectured on Cosmic Forces and vital force as the principal of existence for the bodies of plants, animals, and humans, stating - "We have no name for this force, but through its action the great cosmic scheme of evolution goes on. In India they call it by a Sanskrit name - prana... In 1893, Nikola Tesla described in a magazine article the remarkable effects upon himself and his assistants resulting from their exposure to the action of alternating currents of exceedingly high voltage and frequency during some research work. He prophesied that when electrical oscillations were fully understood and applied by physicians that a universal healing agent - one which would so increase the vital energy and resistive reaction of the human body as to enable it to throw off all disease... The high frequency currents, in short, act as vitality boosters - no other form of electricity will do this. Galvanism, Faradism, Static electricity are all valuable agents in the hands of the Electrotherapeutic specialist, but have little direct action in promoting cell vitality and growth, as do the high-frequency currents when properly applied."
Strong demonstrating the appearance of the human aura when exposed to high voltage, high frequency current with the aid of psychic perception or by which the person can see by gazing through special cyan chemical filters.