A Ramesside smelting furnace. In the circular bowl in the center the ore was melted. A bellows was inserted in the wall of the furnace, now destroyed, to fan the fire to a liquefying temperature so that the heavier molten copper could sink to the bottom. Through a hole made in the upper wall of the furnace the lighter slag was tapped off into the pit flanked by the two long stones. The remaining “bun” of copper on the bottom of the circular furnace was then lifted out.