SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Leonardo sketched a number of machine guns designed to increase the volume and speed of firing. The top sketch shows a` multi-barelled cannon which Leonardo called an "organ-pipe musket". Three rotating gun racks, each with eleven guns, are mounted on a cart and the racks are fired in sequence. The remaining sketches illustrate a gun with a number of barrels arranged in a fan shape to widen the field of fire.
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