1904-04-16: The Hoisting Mechanism of the Great Roller Dam At Schweinfurt, Qermany, Showing the Rack in the Masonry Abutment, Upon Which the Cylinder Moves
1904-04-16: The Hoisting Mechanism of the Great Roller Dam At Schweinfurt, Qermany, Showing the Rack in the Masonry Abutment, Upon Which the Cylinder Moves
