Label Type
curated descriptionLabel
Violet Ray Machine
Amos M. Cato, Little Rock, AR
1930s
Popular in the first half of the 20th century, violet ray machines used high-voltage, high-frequency, low-current electricity for supposed electrotherapy. The machines generated a violet glow from a gas-filled glass electrode and a small amount of ozone. Manufacturers claimed that these machines could cure all manner of human ailments, including hysteria, arthritis, gout, hemorrhoids, brain fog, gray hair, and wrinkles.