Radio Hypnotic Crystal device, c.1950, by Knowles

Made:
1940-1960

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Radio Hypnotic Crystal device, c.1950, by Knowles

Details

Category:
Therapeutics
Object Number:
1982-1450
Materials:
container, metal and contents, sand, ? material
type:
hypnotisers and quackery hypnotisers and quackery
credit:
Natural History Museum