Eisco Leslie's Cubes

<P>These Leslie's cubes have sides with different surface finishes. They are ideal for use in experiments to show how objects emit and absorb heat.</P><P>In use, the apparatus is filled with water which is maintained at boiling point by a low Bunsen burner flame. Infra-red sensors, etc., can be used to compare the relative radiant heat output from each of the four faces.</P>