Vlll CONTENTS. 



SECTION III. 



ELECTRO-DEPOSITION. 

 CHAPTER VIII. 



NICKEL-PLATING. 



PAGE 



Electro-deposition Nickel Physical Properties of Nickel Chemical 

 Properties of Nickel Heat due to the Formation of Double Salts of 

 Nickel Nickel-plating Preparation of Nickel Baths Table of the 

 Principal Solutions for Nickel Baths Chloride of Nickel Sulphate 

 of Nickel Solution used byM. Pdrille Auxiliary Baths for Nickel- 

 plating Cleaning Solutions Potash Solutions Cyanide Solutions 

 Whiting Solutions Hydrochloric Solutions Copper Dipping 

 Baths Coppering Baths for Zinc Preparation of Pieces for Nickel- 

 plating Watt's Method Pfanhauser's Method Julius Weiss's 

 Method Gaiffe's Method Perille's Method Works of M. Pe'rille 

 Elmore's Method Nature of Anodes Surface of Anodes Modus 

 Operand! Nickel-plating of Small Pieces Electromotive Force of 

 the Current Treatment of the Plated Objects after being taken out 

 of the Solution Re-nickel-plating Duration of the Baths Vats for 

 Nickel-plating Nickel-plating of Zinc Meidinger's Process for 

 Nickel-plating Zinc Works of Messrs. Neumann, Schwartz, and 

 Weil Scrubbing-brush ing Machine Special Polishing Machines 

 Drying Oven for Nickel-plated Pieces Nickel-plating of Zinc 

 Sheets Powell's Processes for Nickel-depositing .. .. .. 101 



CHAPTEE IX. 



SILVER AND GOLD PLATING. 



Importance of Silver Electroplating Quantity of Silver used in Electro- 

 plating by Messrs. Christofle Composition of Silver Baths Con- 

 centration of Baths Anodes Preparation of Articles for Silver- 

 plating Cleaning Scouring Cleansing Amalgamation Process 

 of Silver-plating Polishing Observations relating to Organic 

 Matters Oxidised or Antique Silver Weakened Solutions Silver- 

 plating by simple Immersion Gold-plating Composition of Baths 

 for Gold-plating Preparation of Articles for Gold-plating De- 

 scription of the Process Rapidity of the Deposition Variety of 

 Colours of Gold Deposits Incrustations of Gold and Silver 

 Weakened Solutions .. .. .. .. .. .. 142 



