15. Casting Double-Barreled Cannons to Fire Chains

When it exited a cannon’s muzzle, chain would swirl around at incredible speeds, and chop down people in its path like an electric saw going through watermelons. That got some people to think: what if instead of one cannon that fired chain, we had twin cannons that fired a chain stretched between them? The idea was to have an artillery piece that simultaneously fired from two side-by-side barrels a pair of iron balls, with a chain between them. As the balls whirled around each other, the chain between them would scythe down enemy soldiers in its path like wheat. So in 1642, a Florentine gun maker named Antonio Petrini cast a double-barreled cannon to test out the concept.



