Sujet
Carbon microphone, invented in 1878
Légende
Carbon microphone, invented in 1878 by David Edward Hughes (1831-1900), English inventor. From R. Wormell "Electricity in the Service of Man"London, 1890. Engraving
Date
1890
Crédit
Photo12/Ann Ronan Picture Library
Notre référence
ARP07102_390005770
Licence
Droits gérés
Format disponible
33,1Mo (1,4Mo) / 30,0cm x 27,7cm / 3543 x 3267 (300dpi)