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
Fig. 16.—A Forge Trip-Hammer.
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
