'Jean-Daniel Colladon' (born on
15 December 1802 in
Geneva and died on
30 June 1893), was a
Swiss physicist. He studied
law but then worked in the labs of
Ampère and
Fourier. He received an
Académie des Sciences award with his friend
Charles Sturm for their measurement of the
sound speed in water in
Lake Geneva in 1826. He then became professor of
mechanics at
Ecole Centrale Paris in 1829. He returned to
Switzerland in
1839 and organised the
gas lighting of
Geneva and
Naples.
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