Charles Bernard Desormes

Charles Bernard Desormes (French: [dezɔʁm]; 3 June 1777 – 30 August 1862) was a French physicist and chemist. He determined the ratio of the specific heats of gases in 1819. He did this and almost all his scientific work in collaboration with his son-in-law Nicolas Clément (1779–1841). Clément and Desormes correctly determined the composition of carbon disulfide (CS2) and carbon monoxide (CO) in 1801–02. In 1806 they elucidated all the chemical reactions that take place during the production of sulfuric acid by the lead chamber method, as used in industrial chemistry. In 1813 they made a study of iodine and its compounds.