deaths
July 5, 1859
Charles Cagniard de la Tour, French physicist and engineer (born 1777)
Charles Cagniard de la Tour
Baron Charles Cagniard de la Tour was a French engineer and physicist. Charles Cagniard was born in Paris, and after attending the École Polytechnique became one of the ingénieurs géographiques. He examined the mechanism of voice-production, invented a blowing machine and contributed to acoustics by inventing an improved siren. He also studied yeast.