Point and Shoot - WSJ.com: "Gatling was the prototypical Yankee tinkerer, a self-educated deviser of farm implements, including a mechanical planter that fed seeds from a hopper. From seeds, creators of life, it was an easy jump to bullets: Death too could be fed from a hopper. Gatling employed six rifle barrels in a tight cluster. A crank positioned each barrel in turn to have a new bullet dropped into its breech.
It was an elegant solution to a problem that had bedeviled armorers for a century – the best of soldiers could fire only two or three rounds a minute."