4 · Society, Civilization, Culture
49 · education, science and learning
49E · science and technology
49E3 · chemistry
49E39 · alchemy
49E393 · alchemistic equipment
49E3932 · alchemistic furnace
49E3932(...) · alchemistic furnace (with NAME)
49E3932(ATHANOR) · alchemistic furnace: athanor