Search Perfumer & Flavorist: Page 11
A good method of teaching him to memorise the various fragrances is to group them in "families" or "series." In the case of the young people for whose training I was partly responsible, I restricted the number to 15 different series: Citrus, Rose, Orange, Flower, Jasmine, Violet-Iris, Anise-like, Herbal, Green, Spice, Woody, Tobacco, Fruity, Balsamic, Animal, and Leather.