The Ingen-Hausz's Apparatus comprises six equal rods of differing materials each measuring 130mm x 3mm diameter.Rod Materials:CopperIronLeadBrassZincAluminiumThe rods are mounted in corks with their lower end inside a tank which measures 210mm x 75mm x 75mm.The tank is supported on four legs at a height of approximately 170mm above the bench.In use the rods are lightly coated with paraffin wax and the rates of melting compared.Painted with ceramic paint to withstand high temperatures.