we are then presented 



and then suddenly losing this power, and it is very difficult to be- 

 lieve that such can be the case ; whilst another difficulty is the 



fact of the carbon being capable of changing its condition and 



nialoo-y of what takes phice in the case of a 

 silver) how if the metal he cooled slowly the 



iii slowly coo le.l steel and east iron being 



How tin 



