Cross-section of Edison's lamp-black (carbon) button telephone transmitter (microphone). Wood engraving c1891 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / UIG / Universal History Archive |
Taille de l’image : | 5147 px × 6791 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |