AMERICAN INDUSTRIES SINCE COLUMBUS. 171 



to be hammered ; in which case the bar, with that portion of the 

 bloom which adhered to it, was taken to a fire and reheated ; 

 sometimes several of these reheatings were necessary before the 







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whole of the bloom was forged into a bar. At 1 (Fig. 16) is seen 

 a bar, B, whose end is being reheated as described. Whenever 

 it was desired to make round bars, the hammer was provided 

 with a groove of nearly semicircular section, located on one side 



