Boiler Heads, the Ends of the Boilers

Clear box, a nearly square space at one end of a boiler in which the fire is placed. Mud drum A cylindrical shaped receptacle at the bottom of the boiler similar to the steam dome at the top but not so deep. In a locomotive boiler the mud accumulates in the water lake below the firebox. Man holes Our large openings enter the interior of a boiler through which a man may pass to clean out to the inside. Smoke box The space at the end of the boiler opposite to that of the fire in which the smoke may accumulate before passing up the stack or through the small flues in the return type of boiler. Boiler heads, the ends of the boiler