. Transactions. Fig. 8.—Tantalum wire ax- Fig. 9.—Tantalum wire an- nealed 5 MIN. at 1600° C. IN VACUUM. NEALED 1 MIN. IN HYDROGEN ATMOS- X 125. PHERE. X 125. 632 METALLOGRAPHY OF TUNGSTEN. Fig. 10.—Containing1 PER CENT. Th02. Fig. 11.—Containing2 PER cent. Th02.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries