1905, Knapp. Halle.). Kiliani (Berg. uncl Hiittenmann. Ztg., 1883, 251) found that at very high current-densities, namely, between 18 and 100 amperes per sq. dcm., zinc could be deposited from the neutral sulphate solution without any appreciable evolution of hydrogen, and in a hard, bright condition. On account of the resistance of this solution, these current-densities could, of course, only be obtained by the application of high voltages. Scope of Ezperiment8.-In the present work a

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... investigation has been made of the different factors which regulate and influence the deposition of zinc by electrolysis. As mentioped above, it has been invariably found by earlier