It was in the 1930’s, in the town of Loma Linda in Southern California where Dr. Rife was doing his work. His activities involved, 1st, the development of the strongest optical microscope, and 2nd, matching a frequency to biological organisms that would have a negative effect on those organisms. His obvious goal was to target cancer cells with a resonant frequency that would result in their destruction.
By viewing the targetted cells being vibrated by a specific frequency, he would be able to observe how they behaved.
Eye on the Ball 