X CONTENTS. 



SECTION IV. 



ELECTRO-METALLURGY. 

 CHAPTEE XIII. 



REFINING OF COFFEE AND LEAD. 



PAGE 



Refining of Copper Calculations relating to the Refining of Copper 

 Elkington's Patent Hamburg Refining Establishment Works of 

 Messrs. Oeschger, Mesdach, and Co. Experiments of M. Mascart, 

 manager of the Biache Works M. Andre's Works at Frankfort 

 M. Hilarion Roux's Works at Marseilles The Selly Oak Works of 

 the Elliot Metal Company, near Birmingham Wilde Machines for 

 Electrolysis Siemens Machines for Electrolysis Oker Foundry 

 (Germany) Of the Economical Conditions of Copper Refining by 

 Electricity Experiments of M. Gramme on Baths of Sulphate of 

 Copper Table of Experiments with Soluble Anodes in Baths con- 

 nected in series Table of Experiments with Anodes varying in sur- 

 face Table of Experiments with Insoluble Anodes Conclusions on 

 M. Gramme's Experiments Experiments of M. Becquerel 

 Observations on the Deposition of Copper on the Walls of the Vats 

 'Thickness of Copper Electro-depositions in a given time Table 

 of Experiments on Copper deposited in one week Specific Resis- 

 tance of Baths Table of Power Expended in various factories 

 Capital Absorbed Cost of First Establishment Recapitulation 

 Table Table of Absorbed Capital in various factories Cost Price 

 of Refining Copper Table showing the Cost Prices in various 

 factories Of the Use of Hydraulic Power Refining of Lead 

 Experiments of Mr. Keith Experiments of M. Hampe .. .. 195 



CHAPTER XIV. 



TKEATMENT OF ORES. 



Of the Importance of the Subject Bunsen's Method of Preparing 

 various Single Bodies Saint-Claire Deville's Method of Preparing 

 various Single Bodies Becquerel's Method for the Treatment of 

 Gold, Silver, and Copper Ores Conclusions of M. Becquerel 

 Lambotte-Doucet's Method Luckow's Method Letrange's Method 

 for the Treatment of Zinc Ores M. Cadiat's Experiments on 

 Letrange's Method Treatment of Sulphates, Deligny's Method 

 Bias and Miest's Method Marchese Process, in use at Genoa 

 Lambert's Method for the Treatment of Gold and Silver Ores 

 Werdermann's MethodCobley's Method Trial of the Treatment 

 of Argentiferous Copper Ores .. .. .. .. .. .. 236 



