At the earliest possible date, therefore, steel rails were used to replace iron on all railways then in existence. The approach to the main southbound platform at Dundee Station has a sharp curve. Other advantages are the careful handling of the material, particularly the rails, and better preparation of the subsoil sleeper bed. They set the British railways track laying by night by which future new things would be deemed new. Each impression is photographed and recorded. The rail seat of the chair is rounded to a radius corresponding with that of the underside of the rail-foot, which is 12 in.