All along the line of machines, the men's hands and arms worked like the legs of spiders spinning a web. They wound wire and hammered bolts, tied knots and welded pieces of steel and fitted gears. They did not look at each other or sing or whistle or talk or laugh. And then—he made a mistake. Instantly he stepped back and a trouble shooter moved into his place. The trouble shooter's hands flew over the controls. The trouble shooter finished and the workman took his place. His arms moved ceaselessly again
