. Transactions . N^y_ ;»l rruiii the left, and slowlv No. 4.—Hardened, and tempered from the Metal in Cast Ingots. Pirate VI. The Mickostructure of From niicrophotographs taken by A. Martens, at the Royal Mechanico-Technical Experimental Station, Charlottenburg, Germany. B, liard ; per cent, carbon. V- ? Y^^ Mi ^o 1 —In oii^iiiil luiuliLion ^i^^A^ ^(). 2.—Heaied from liie lefi, uiui .lucn^iicJ in water.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries