National Geographic : 1944 May
Bethlehem Steel Baking Coal into Coke, These Ovens Extract By-products Essential to ThousandsofChemical Compounds Piped off from the top cylinders are gases and distillates wasted by old-style beehive ovens. Mounted on rails, a charging cardrops coal into theovens. Below it, incandescent coke shoots into a car for quenching. Two cars carry coke, the porous, partly consumed residue of coal (page 589). Coke consists largely ofcarbon.