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But, if such a thing were a metallurgical possibility, I should say that it was gold treated in some manner that gives it as great a hardness as bronze receives when treated with phosphorus, but with some chemical change wrought in its constitution that gives it also the tempered quality of steel.
Many parts of machinery will be electro-deposited like the small articles already mentioned in aluminium or hard copper at the metallurgical works where ore is being treated for the recovery of metal, or even at the mines themselves. Side by side with this movement there will be one for developing the system of stamping mild steel and then tempering it.
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