The tires are propelled by some mysterious force to the same spot; as the two elements coincide, workmen quickly put them together.

In a long room the bodies are slowly advanced on moving platforms at the rate of about a foot per minute.

At the side stand groups of men, each prepared to do his bit, their materials being delivered at convenient points by chutes.

As the tops pass by these men quickly bolt them into place, and the completed body is sent to a place where it awaits the chassis.

This important section, comprising all the machinery, starts at one end of a moving platform as a front and rear axle bolted together with the frame.