Xll 



CONTENTS. 



Oxidising Silver 

 Protection of Silver Surface 

 Cleaning of Silver 



PAGE 



125 

 126 

 126 



ELECTRO-GILDING. 



Preparation of Solution of Gold, 



Battery Process for Preparing Gold Solution . 



Process of Gilding .... 



Conditions required in Gilding 



Method of maintaining the Gold Solution 



Method of regulating the Colour of the Gilding 



Colouring of Gilding .... 



Method of dissolving Gold from Gilt Articles 



Objections to Electro-Gilding . 



Effects of Cyanogen upon Health 



Practical Suggestions on Gilding 



127 

 128 

 129 

 129 

 129 

 130 

 131 

 131 

 131 

 132 

 123 



RESULTS OF EXPERIMENTS ON THE DEPOSITION OF 

 OTHER METALS AS COATINGS. 



Coating with Platinum . . . . . . .135 



Coating with Palladium . . . . . .136 



Coating with Nickel . . . . . . .136 



Deposition /if Antimony, Arsenic, Tin, Iron, Lead, Bismuth, and 



Cadmium .... ... 136 



Deposition of Alloys . . . . . . .137 



Deposition of Bronze . . . . . . .138 



THEORETICAL OBSERVATIONS. 



Action of Sulphate of Copper upon Iron 



Faraday's Theory of Electrolysis 



Graham's Theory of Electrolysis 



Daniell's and Miller's Views . . . ' 



Proposed Theory .... 



139 

 139 

 140 

 141 

 142 



INDEX 



145 



