Giant tire manufacturer. Giant vulcanizer used in the vulcanization of bullet-sealing gasoline tanks, eight-foot high bomber tires and huge 3,600-pound earth mover tires. This unit at a large Eastern tire plant is the largest of its kind in the world. It must be thoroughly and constantly inspected as it is in frequent service on war production. Here the inspector is checking the steam and pressure fittings. The mold, when open, stands more than two-and-a-half stories high and weighs over 300,000 pounds. Firestone