OIL-TEMPERING HEAVY SHAFT. (See page 420.)

Showing a shaft weighing about 33,000 pounds being taken from the

vertical heating furnace and suspended over the oil-tank preparatory to

being lowered for tempering. The heating furnace and oil tank are served

by a sixty-ton traveling crane and forty-ton jib crane. The shrinking

pit for assembling is situated between the heating furnace and oil tank.