HAMILTON SCIENTIFIC ASSOCIATION 55 



Changes In Composition Due To Annealing. 



It has been found pos.sible to repeatedly anneal malleable 

 iron without injuring it, the only important change after the 

 first anneal being the gradual reduction of the carbon. Un- 

 less an excessive temperature is reached the quality seems to 

 undergo neither deterioration nor improvement by greatly 

 extending the period of the anneal. 



