Halliwell-Shelton Violet Ray

The Halliwell-Shelton Violet Ray is a violet ray-type device that was marketed as an instrument for electro-therapy. It was sold by Halliwell-Shelton Electric Co. of New York, NY, a merger of Halliwell with the Shelton Electric Laboratories, manufacturer of the Shelton Violet Ray.

Resources

 * &mdash; promotional pamphlet