Sujet
Carbon microphone, invented in 1878
Légende
Carbon microphone, invented in 1878 by David Edward Hughes (1831-1900), English inventor. From Theodore Eckardt "Physics in Pictures", London, 1882
Date
1882
Crédit
Photo12/Ann Ronan Picture Library
Notre référence
ARP07103_460000371
Licence
Droits gérés
Format disponible
23,7Mo (844,6Ko) / 19,8cm x 30,0cm / 2335 x 3543 (300dpi)