Radio Hypnotic Crystal device, c.1950, by Knowles
- Made:
- 1940-1960
Radio Hypnotic Crystal device, c.1950, by Knowles
Details
- Category:
- Therapeutics
- Object Number:
- 1982-1450
- Materials:
- container, metal and contents, sand, ? material
- Measurements:
-
height 69 mm
width 45 mm
depth 7 mm
- type:
- hypnotisers
- credit:
- Natural History Museum