• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 4 · Society, Civilization, Culture
• 41 · material aspects of daily life
• 41B · heating, lighting, ventilating
• 41B1 · open fire (in general)

41B15 · deposits of combustion

• 41B151 · soot
• 41B152 · ash
• 41B153 · cinders, slag