Manufactured Fuel Gases
Manufactured Fuel Gases : A mixture of gases usually composed of various proportions of some of the following: (1) coal gas - formed by distillation or cracking of bituminous coal, (2) coke-oven gas - produced in a similar manner as a by-product in the manufacture of coke, (3) carbureted water gas - formed by flowing steam through incandescent carbon, (4) oil gas - made by "cracking" petroleum oils