CHAPTER I.

_Silver._

Silver, Characteristics of 5 Silver for Filigree Work 5 Indian Filigree Workers 5 Malleability of Silver 6 Ductility of Silver 6 Test for Pure Silver 6 Silver known to the Ancients 6 Silver Currency 6 Polished Silver 7 Tarnishing of Silver 7 Density of Silver 7 Fusibility of Silver 7 Heating Power of Silver 7 Action of Silver under Great Heat 8 Hardness of Silver 8 Nitrate of Silver 8 Silver resists Aqua-regia 8 Chief Places of Filigree Manufacture 8 Chief Uses of Silver 9 Price of Silver, Commercial 9 Ores of Silver 9 Dissolution of Silver 9 Caustic Alkalies 10 Nitre 10 Vegetable Acids 10