English inventor from r wormell Stock Photos and Images
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 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-carbon-microphone-invented-in-1878-by-david-edward-hughes-1831-1900-57305231.html
RMD96DBB–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
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 Stock Photohttps://www.alamy.com/licenses-and-pricing/?v=1https://www.alamy.com/stock-photo-carbon-microphone-invented-in-1878-by-david-edward-hughes-1831-1900-135678203.html
RMHTMJX3–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
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