Copper Fire-Box

In earlier American and in foreign locomotive practice the sheets exposed to the fire in the firebox have been made of sheet-copper, ab. inch thick. The advantages were its high conductivity for heat and the ease with which it could be shaped and would endure expansion strains. The objections are its cost, and its softne , which will not resist abrasion from cinders nor withstand abuse from firing tools. Copper Glance. See CHALCOCITE. Copper-Head.