Nicolas Clément

Nicolas Clément (1779-1841) was a brilliant chemist and entrepreneur, although he lacked a formal education. Alone, or in collaboration with his father-in-law, Bernard Desormes, he developed the theory of the manufacture of sulfuric acid by the lead chamber method, discovered the correct formula of carbon monoxide and carbon disulfide, and the composition of lapis lazuli, as well as carrying on the industrial manufacturing of alum, ferrous sulfate, alcohol, etc.