Note 23 — Chapter VIII · CARBON AND THE HYDROCARBONS
George Kamensky translation
Gaseous and volatile hydrocarbons decompose when passed through a heated tube. When hydrocarbons are decomposed by heating, the primary products are generally other more stable hydrocarbons, among which are acetylene, C2H2, benzene, C6H6, naphthalene, C10H8, &c.