des the repeated heats to whichthe substance of the mass is subjected, renders theinterior structure granulous, spongy and unconsoli-dated. In nearly all of these heavy forgings it is onlythe outside of the mass which is laminated and con-solidated from impact of the hammer, the impress ofimpact or… … YEAKELS MODE OF MAKING CANNON. charcoal iron, called ingots, welded together. Mr.Krupp, of Essen, in Prussia, is the inventor of thismild or semi-steel, and although the explosion of histrial gun, at Woolwich, England, on the sixteenth fire,was not by any means a fair test of his principle, stillit…
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