Comprising a cylinder 100 x 25 mm dia. Half of which is wood and other metal if paper is wrapped tightly round the cylinder and the rod is held above the flame, the portion in contact with the wood will be quickly scorched while the portion in contact with the metal will remain unchanged.
To demonstrate relative thermal conductivity of brass, copper, nickel, aluminium and iron. A rod of each metal is radially spaced equally on a brass hub. Each of the rod has a cavity at the outer end for holding paraffin. Using the wooden handle, hold the brass hub over a flame, the wax will melt at different times.
