Elisha K. Root, forging and the American system / Paul Uselding.
Abstract:
"Root's achievements came at a crucial juncture in the evolving system of interchangeable manufacture, that is, the time at which its principles would be transmitted from the firearms industry to a wide array of metal-fabricated products entering the growing industrial commerce of America of the mid-19th century."
Technology and culture Vol. 15 (1974), p. 543-568