R&R Ultra Violet Ray and Radiation Machine

The R & R Ultra Violet Ray and Radiation Machine is an ultra-violet therapeutic device, containing a high-voltage mercury vapor discharge tube, that was marketed as an instrument for use in ultraviolet light therapy. It was sold by Lawndale Laboratories of Lawndale, California.

(Though it has sometimes been conflated into the category of violet ray generators, the Ray & Radiation Machine is an ultra-violet generator, and was not used as an electro-therapeutic device.)