Berthelot, Pierre Eugène, a French chemist, born at Paris; professor in the College of France; distinguished for his researches in organic chemistry, and his attempt to produce organic compounds; the dyeing trade owes much to his discoveries in the extraction of dyes from coal-tar; he laid the foundation of thermo-chemistry; (b. 1827).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Berthelier * Berthier, Alexandre