Thomas Alva Edison (1847-1931) American inventor, listening to a recording on an electric model of his phonograph powered by a wet battery. Engraving

---

Size: 2886px × 3543px
Location:
Photo credit: © Photo12/Ann Ronan Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, 20th, century, cigar, listening, man, physics, science, scientist, smoking, sound, stethoscope, tool