An Elementary Treatise on Iron Metallurgy, Up to the Manufacture of Puddled Bars, Built Upon the Atomic System of Philosophy: Comprising Suggestions Relative to Important Improvements in the Manufacture of Iron and Steel, and the Conduct of Extensive Iron Works

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Simpkin, Marshall, & Company, 1860 - 528 стор.
 

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Сторінка 249 - ... additional hammering, that part of the bar immediately becomes crystallized, and so extremely brittle that it will break to pieces by merely throwing it on the ground, though all the rest of the bar will exhibit the best and toughest quality imaginable- This change, therefore, has been produced by percussion as the primary agent...

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