At the Jewel City Bowl in Glendale, Calif., 300 spectators gathered for an unusual bowling event. They had come not to watch bowlers but machines. As a bowler sent his ball crashing into the tenpins, the ball hit the cushion, set off an automatic switch. Almost before a spectator could say "Strike," an intricate machine swept the alley clean of pins, set them in place on a rack, dropped a second set of pins into place, and sent the ball back to the bowler. It was an impressive demonstration of the American...
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