Charles Cros

Charles Cros (October 1, 1842 - August 9, 1888) was a French poet and
inventor. He was born in Fabrezan, France.

Cros was a well regarded poet and humorous writer. He developed various
improved methods of photography including an early color photo process. He
also invented improvements in telegraph technology.

He is perhaps most famous as the man who almost, but not quite, invented the
phonograph. In April 1877 he submitted a paper to the Academy of Sciences in
Paris suggesting that the vibrations of sound waves could be traced with a
pen attached to a vibrating membrane, then the waves could be engraved into
metal, and then a stylus attached to a membrane could be run over the
engraved wave to reproduce the sound. Before Cros had a chance to follow up
on this idea or attempt to construct a working model, Thomas Alva Edison
introduced his first working phonograph in the USA. Edison and Cros
apparently did not know of each other's work at the time.

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