Abstract
Presents a photograph of James Henry Eastman's violet ray machine. In 1917, Eastman took advantage of the electrotherapy rage sweeping the United States and opened the Renulife Electric Co. to manufacture and sell violet ray machines. These quasi-medical devices, according to the company, could cure ailments ranging from abscess to writer’s cramp, and dozens of others in between. The machines employed a Tesla coil to produce a high-frequency, low-current beam, which was then applied to the skin via partially evacuated glass cylinders known as Geissler tubes. The high voltage ionized the gas within the tube, creating the purple glow that gave the device its name.
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