Telephonic set of instruments (Edison's system), c 1880s.
© Science Museum / Science & Society Picture Library
Engraving by Kohl. The American scientist and inventor Thomas Alva Edison (1847-1931) redesigned the telephone shortly after its invention by Alexander Graham Bell (1847-1922) in 1876. Edison was also the inventor of the phonograph and the electric light bulb. Illustration from 'Electricity and Magnetism' by Amedee Guillemin (1826-1893), published in London in 1891.