Search every volume:

Volumes

1. Vol 1 The Handset and Its World What a violet-ray wand is, its velvet-lined cased set and fan of glass electrodes, and how a mains 'health generator' was sold to American homes from the 1910s to the 1940s.
2. Vol 2 What It Actually Did: The Physics The real signal path from wall socket to skin — interrupter, resonant coil, gas-discharge glow, and ozone — and why the violet light was never ultraviolet therapy.
3. Vol 3 The Makers and Their Machines The manufacturers and models behind the violet-ray wand — Renulife of Detroit as archetype, its rivals Master, Fitzgerald, Fisher and Bleadon-Dun, the ocean of drugstore-brand handsets, and how a collector reads a cased set to identify and roughly date it.
4. Vol 4 The Promise and the Reckoning What the violet-ray wand was sold to cure, why the medicine never held up, and the long regulatory road — JAMA's 1917 dismissal, the 1938 Food, Drug, and Cosmetic Act, and the 1950–51 FDA action that ended the trade — plus the device's strange modern afterlife.
5. Vol 5 Collecting, Restoring, and Displaying The glass-electrode catalogue and its uses, how to identify and date a set, condition assessment, the safety case for treating every surviving unit as an unsafe antique mains appliance, and how to display one.