Three devices for ventilating mines with bellows. In the centre the horse turns the wheel and cams, I,I, work the bellows. At the top, a horse turns a crown wheel which engages with a lantern on the camshaft and the cams engage with tappets to work the bellows. At the bottom, a man works the bellows

Battle of Britain (July10-October 31, 1940): Hawker Hurricane of Fighter Command, as first line of defense, on its way to engage German bombers as they crossed the south coast of England. First major battle fought and won in the air, World War II