. Transactions. Fig. 29a.—Tungsten ingot contain- Fig. 30.—Fine-grained tungsten ingot ING PER CENT. THO2, HEATED 20 WITH FUSED CENTER. X AT 2600° C. AND THEN HEATED 10 MiN. AT 3200° C. X Fig. 30a.—Fine-grained tungsten in-got WITH FUSED CENTER. X 144. Fig. 31.—Coarse-gr.\ined tungsten in-got WITH FUSED center. X 17.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries