Electrochemical and metallurgical industry . day morningan excursion is planned to Nazareth, with visits to the quaintMoravjan buildings, Nazareth Hall, school, Indian buryingground and the Whitefield house. For the afternoon theoption of either an excursion to Mauch Chunk or the attend-ance of the opening exercises of Lehigh lniversity is offered. .?y inquiries are to be addressed to the secretary of thelocal committee. Mr. Walter S. Landis. Met. Eng., Bethle-luin. Ia. September, 1905.] ELECTROCHEMICAL AND METALLURGICAL INDUSTRY. 327 Report of the Karlsruhe Meeting of the GermanBunsen Society
Electrochemical and metallurgical industry . day morningan excursion is planned to Nazareth, with visits to the quaintMoravjan buildings, Nazareth Hall, school, Indian buryingground and the Whitefield house. For the afternoon theoption of either an excursion to Mauch Chunk or the attend-ance of the opening exercises of Lehigh lniversity is offered. .?y inquiries are to be addressed to the secretary of thelocal committee. Mr. Walter S. Landis. Met. Eng., Bethle-luin. Ia. September, 1905.] ELECTROCHEMICAL AND METALLURGICAL INDUSTRY. 327 Report of the Karlsruhe Meeting of the GermanBunsen Society. Bv l\. Daxneel, Ph. D., and J. K. Clement, Ph. D. The following is a concise report of the papers presented atthe general meeting of the Bunsen Society for Applied Phys-ical Chemistry, held in Karlsruhe from June I to 4. Electrolysis With Alternating paper on this subject was presented by Prof. MaxLeBlanc. When an alternating current is passed through asolution of CuSOi, with copper electrodes, the metal is dis- Ni in 4n KCX. 5000 Alternations pov minute. 10000 FIG. I.—electrolysis WITH ALTERNATING CURRENTS. solved by one-half wave of the current (during one half ofthe period) and is immediately redeposited by the next halfwave. The total effect is that the electrodes remain undis-solved. If, however, there is an opportunity for the metal toenter when dissolved, into a compound from which it cannotbe deposited, even by direct current (e. g., in a KCN solutionof Cu), H2 and not Cu is liberated in one-half- period, whileCu is dissolved in the next half period, i. e., the total effectobserved is the solution of the metal in accordance with Fara-days law. This holds only with alternating currents of lowfrequency. When the frequency is so high that the Cu hasnot time to enter into the complex cyanic compound, theaction is the same as with copper electrodes in CuSOj: thetotal effect is no solution of Cu. With high frequencies Cudoes not dissolve; with low frequencies it
Size: 2134px × 1171px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectmetallurgy
