. Transactions. 3 4 5 Lb. Deposit, per oq. Ft. Fig. 2 3 4 Lb. Deposit iier Sq. Ft, Fig. 3.—Bully Hill ores, June, 1915. (Hansen.) Current density, 15 amp PER SQ. FT. Figs. 9 and 10, in turn, serve to collect all of the preceding data on,single curve sheets. 214 ELECTROLYTIC ZINC

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