Berthollet, Count, a famous chemist, native of Savoy, to whom we owe the discovery of the bleaching properties of chlorine, the employment of carbon in purifying water, &c., and many improvements in the manufactures; became a senator and officer of the Legion of Honour under Napoleon; attached himself to the Bourbons on their return, and was created a peer (1744‒1822).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Berthier, Alexandre * Berthoud