This 27-chapter volume arose from a symposium held in Lyon, France, in June of 1999, that sought to integrate information from academic scientific studies of olfaction, largely psychological in nature, with knowledge derived from the perfume industry. It is dedicated to the French perfumer Edmond Roudnitska, known for creating such classic fragrances as “Femme” (1944, Rochas), “Diorama” (1948, Dior), L'Eau” (1951, Hermès), “Diorissimo” (1956, Dior), “Eau Savage” (1966, Dior), and “Diorella” (1972, Dior), and addresses such topics as odor classification, odor memory, odor conditioning, and the plasticity of chemosensation.