David Edward Hughes, English electrician and inventor, c 1880s.

Delzers, A

 
David Edward Hughes, English electrician and inventor, c 1880s.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Description

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.

© Science Museum / Science & Society Picture Library

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