Geology. 275 
molecule to molecule under the form of heat or temperature. The 
energy applied to the bar does not change its character ; it passes 
right along from molecule to molecule under the form o 
temperature. But the nature of the process must be wholly differ- 
ent if the transference takes place through a bar of ice at the tem- 
perature of 32°. Suppose we apply the heat of the fire to the end 
can molecule A take on, under the form of heat, the energy re- 
« 
de. 
The question is susceptible of a clear and definite answer. 
When heat is applied to a molecule of ice at 32°, the heat applied 
zing. The heat thus given out may be employed to meet the 
next adjoining molecule. The ice-molecules take on energy from 
a heated body by melting. The peculiar form of motion or energy 
a 
he 
accepts of 
