. Transactions. Fig. 26.—Longitudinal section at section a-a of fig. 25. X Fig. 27. Fig. 28. Fig. 27.—^Longitudinal, fracture of tungsten ingot containing percent. Th02. Cold end in electrode clamp. X 5. Fig. 28.—Tungsten ingot containing per cent. ThOo, heated quicklyto 3200° C. AND held 30 min. X 5.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries