National Geographic : 1928 Dec
Photograph byEwing Galloway THE LACK OE AN ADEQUATE HOME SUPPLY OF GOOD FUEL HINDERS GERMAN INDUSTRY Quantities of oil, gasoline, and coal are imported. Brown coal, usually made into briquettes, is stripped from vast open pits inseveral parts ofGer many. Generations from now, when such open-pit mines are exhausted, how people may speculate on the origin of these vast, craterlike depressions! An open-pit coal mine in Prussia.