CHAPTER X.

_Enriching the Surfaces of Silver._

Production of the best and richest Surface 139 Oldest Method for Whitening 140 East Indian Silversmiths 141 Indian Mode of Whitening Silver 142 Another Mode of Whitening 142 Boiling-out Pan 143 Boiling-out Mixture 143, 144 Our Mode of Whitening 145 Surface Refining of Silver 146 Brown Colour on Silver Goods 146 Common Articles of Silver 147 Whitening Powder or Mixtures 147 Nitrate of Silver Mixture 148 Improving the Colour of Electro-plate 149 Electro-plating 149 Discoverer of Electro-plating 149, 150 Constant Battery 150 Best Battery for Plating 151 Strength of Battery Solution 151 Bunsen's Battery 152 Exciting Mixture for Battery 152 Zinc Amalgamation 153 Conducting Wires 154 Preparation of Plating Solution 155 Cyanide Solution 156 Black Cyanide 157 Strength of Plating Solution 157, 158 Inferior Plating Solution 159 Recovery of Silver from Plating Solutions 160 Scratch-brushing 161 Scratch-brush Lathe 161 Burnishing Silver Work 161, 162 Oxidizing Silver Work 163 Solution No 1. 163 Solution No 2. 164 Solution No 3. 164 Producing various Shades 165