ELECTRO-METALLURGY (A Treatise on): Embracing the Application of Electrolysis to the Plating, Depositing, Smelting, and Refining of various Metals, and to the Reproduction of Printing Surfaces and Art Work, &c. By WALTER G MCMILLAN, F.I.C., F.C.S., Lecturer on Metallurgy, Mason College, Birmingham. With numerous Illustrations. Large Crown 8vo. Cloth, 10s. 6d. "One of the BEST and MOST COMPLETE manuals hitherto published on ElectroMetallurgy."-Electrical Review. ELEMENTS OF METALLURGY: A General Treatise on the Art of Extracting Metals from their Ores. By J. ARTHUR PHILLIPS, C.E., F.C.S., F.G.S., and H. BAUERMAN, F.G.S. THIRD EDITION. In Royal 8vo. With numerous Illustrations, 36s. "The value of this work is almost INESTIMABLE."-Mining Journal. METALLURGY (An Elementary Text-Book of). By Prof. HUMBOLDT SEXTON, F.I.C., Glasgow and West of Scotland Technical College. With numerous Illustrations, 68. ASSAYING (A Text-Book of). By J. J. BERINGER, F.C.S., F.I.C., Lecturer to the Mining Association of Cornwall, &c.; and C. BERINGER, F.C.S. FOURTH EDITION, 10s. 6d. "A REALLY MERITORIOUS WORK, that may be safely depended upon."-Nature. MINE-SURVEYING: For the Use of Managers of Mines, Collieries, By B. H. BROUGH, F.G.S., formerly Instructor of Mine Surveying, Royal School of Mines. FIFTH EDITION, Illustrated, 7s. 6d. &c. "No English-speaking Mine Agent or Mining Student will consider his technical library complete without it."-Nature. ELECTRICAL RULES AND TABLES FOR THE USE OF ELECTRICIANS AND ENGINEERS. By J. MUNRO, C.E., and Professor A. JAMIESON, F.R.S.E., M.Inst. C.E., M.Inst. E. E. TWELFTH EDITION, Leather, 8s. 6d. "Wonderfully perfect. it."-Electrician. Worthy of the highest commendation we can give GRIFFIN'S METALLURGICAL SERIES. EDITED BY W. C. ROBERTS-AUSTEN, C.B., F.R.S., Chemist and Assayer of the Royal Mint; Professor of Metallurgy in the Royal College of Science. In Large 8vo, Handsome Cloth. With Illustrations. INTRODUCTION TO THE STUDY OF METALLURGY. By the EDITOR. FOURTH EDITION. Large 8vo. Shortly. GOLD (The Metallurgy of). By THOMAS KIRKE ROSE, Assoc. R.S.M., D.Sc., Assistant-Assayer of the Royal Mint. SECOND EDITION, 21s. IRON (The Metallurgy of). By THOMAS TURNER, Assoc. R. S. M., F.I.C. 16s. STEEL (The Metallurgy of). By F. W. HARBORD, F.I.C., Assoc. R.S.M. SILVER AND LEAD (The Metallurgy of). By HENRY F. COLLINS, Assoc.R.S.M., Assoc. Mem. Inst.C.E. ALLOYS. By the EDITOR. Other Volumes in Preparation. LONDON: CHARLES GRIFFIN & CO., LTD., EXETER STREET, STRAND. Lawrence Scloud" - ELECTRIC SMELTING AND REFINING: THE EXTRACTION AND TREATMENT OF METALS BY MEANS OF THE ELECTRIC CURRENT. BEING THE SECOND EDITION OF "ELEKTRO-METALLURGIE." BY DR. W. BORCHERS. TRANSLATED, WITH ADDITIONS, BY WALTER G. MCMILLAN, LECTURER ON METALLURGY IN MASON COLLEGE, BIRMINGHAM; AUTHOR OF A “TREATISE Witb 3 Plates and Numerous Illustrations in the Text. LONDON: CHARLES GRIFFIN AND COMPANY, LIMITED; 1897. [All Rights Reserved.] PREFACE. IN bringing before English readers an English version of a manual so well known as that of Dr. Borchers-on a subject which has so rapidly attained to the prominent position now held by Electro-Metallurgy-but little by way of introduction is needed. The Author, in his preface to the Second German Edition (that of 1896, from which the present volume has been translated), refers to his twelve years' practical work in chemical and metallurgical industries, and states that in preparing the first edition he had hoped to be of service to his fellow-labourers by laying before them the results of the experience with electro-metallurgical processes which he had gained in conducting experimental tests on a scale sufficiently large to enable him to form a trustworthy opinion as to their practical value. During the four years which elapsed before the appearance of the Second Edition, electro-technology had made enormous progress; and at the end of that time the Author found himself at liberty to publish much information which previously, owing to personal considerations and business obligations, he had been prevented from giving to the world. He, therefore, re-wrote and greatly extended the work in the edition from which this version is taken. A short sketch only is given of the newer electro-chemical theories, and the student is referred for fuller and more elaborate explanations to the works of Ostwald on General Chemistry and Electro-Chemistry, and to that of Nernst * Nernst's Theoretical Chemistry from the Standpoint of Avogadro's Rule and Thermodynamics. Translated by C. S. Palmer. |