A rod of five metals is radially spaced equally on a brass hub. Each rod has a cavity at the outer end. To demonstrate relative thermal conductivity of brass, copper, aluminium, iron and stainless steel.
A rod of each metal is radially spaced equally on a brass hub. Each of the rods 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.