Heat transmits readily through this

Pure ice transmitted only in the proportion of 6 rays in the 100 from the lamp, and entirely excluded those * from other sources. The discovery of the fact that heat ... Heat from. very intense sources is more refrangible and passes more readily through most substances than heat of low intensity. Thus, the heat of the sun passes

Can you be more specific?

... Diamond is the best conductor of heat, but heat also transmits readily through many other substances. Do you have multiple choice?