… Coal gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous hydrocarbons. …
Explanatory notes
… C oal gas, water gas, producer gas and similar gases, other than petroleum gases and other gaseous hydrocarbons. Coal … works or coke ovens. It is a complex mixture of hydrogen, methane, carbon monoxide, etc., and is used for lighting or … lighting purposes and in the synthesis of chemicals, e.g., methanol, ammonia. In the latter case, they are sometimes …