“An invention with great healing properties, but attacked, banned, forgotten and labeled quack medicine. It is important to understand its history, how it works, how it developed and what results can be expected. This article attempts to give you this basic information about what is commonly called the Violet Ray, but also goes under several other names.
One of the early observed and remarkable features of the high frequency currents, and one which was chiefly of interest to the physician, was their apparent harmlessness which made it possible to pass relatively great amounts of electrical energy through the body of a person without causing pain or serious discomfort.”
Nikola Tesla, in his 1898 paper High Frequency Oscillators for Electro-Therapeutic and Other Purposes
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