Transactions . Fig. 3.—The sameat 500 X- Small bubbles are Fig. 4.—Cylinder A. Remelted from Americanseen at this magnification. ingot iron in the gas furnace. Plate II.—Photomicrographs,vol. xlvii.—23 706 THE CRITICAL RANGES A2 AND A3 OF PURE Fig-5-— Cylinder Ag. Cylinder from Cains Fig. 6.—(Langheim-Pfanhauser) Cylinder iron, remelted in gas furnace. 26, remelted in Arsem furnace in vacuo.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries