the tower is tall, giving a drop distance for the lead shot from the crucible room of . the crucible room has a diameter of and originally housed a gas fired cast iron cauldron, for melting the lead ingots. a lift provided access to the crucible room for both personnel and ingots, along with an emergency staircase. the lead shot fell into a tank of cooling water at the foot of the tower, and were transferred by a conveyor belt to hoppers in the roof of the processing building.