Chladni

Chladni, Ernst Florens Friedrich, was born at Wittenberg in 1756. Brought up as a lawyer, he devoted much attention to music, and having a knowledge of mathematics and physics, was led to investigate the theory of sound. He discovered the laws of vibration, and was the first to notice the figures formed by fine sand on a sheet of glass in response to the vibrations of a violin bow. He also invented the euphone and the clavi-cylinder. His scientific works were numerous, the principal being his Discoveries on the Theory of Sound (1787) and his Treatise on Acoustics (1802). He also wrote on meteors. His death took place at Breslau in 1827.