David Edward Hughes, English electrician and inventor, c 1880s.
© Science Museum / Science & Society Picture Library
Etching by Delzers after a photograph. Hughes (1831-1900) emigrated to America in 1837 where he patented the improved type-printing telegraph in 1855. In 1878 he invented the microphone almost simultaneously with Ludtge. Published by the International Telecommunication Union. Dimensions: 230 mm x 190 mm.