Investigating the electrical activity of the brain. From 'Le Petit Inventeur', Paris, 1926.

---

Size: 2187px × 3205px
Location:
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1920s, electric, france, french, helmet, ill, medicine, patient, physician, progress, twenties