Tin is named from the Anglo-Saxon tin. The symbol is derived from the Latin stannum and tin has been known since ancient times. Tin is chiefly found in cassiterite and most of the world's supply comes from Malaysia, Bolivia, Indonesia, Zaire, Thailand and Nigeria. Tin is obtained by reducing the ore with coal in a reverbatory furnace. Ordinary tin is a silvery-white metal, is malleable, somewhat ductile and has a high crystalline structure. Tin takes a high polish and is used to coat other metals to prevent corrosion or other chemical action. Such tin plate over steel is used in the so called tin can for preserving food. Alloys of tin are used for making solder, pewter, bronze and bell metal.