106 



Europe. Quartz from North Wales and Eussia. 



South Africa. A large block of the famous banket will be found on a table 

 near the door. 



Gold quartz from Mysore will be found in case 103, and from 

 Ontario in 104. 



Case 81. SILVER. 



The earlier portion of this case contains a number of silver 

 minerals from Yarious parts of the world, arranged according to 

 composition. 



Native silver. 411, Zacalecas, Mexico ; wiry form occupying cavities. 



3498, Chihuahua, Mexico ; in calcite. 



432, Preiberg, Saxony ; a beautiful arborescent form. 



8633, Bull Hill, Colorado ; in stephanite. In this specimen 

 the native silver is growing out of the stephanite, from the 

 alteration of which it has resulted. 



405, Mexico ; a fine specimen of wire silver on galena. 



Others from Queensland (Croydon), Kussia, Tasmania, and 

 Preiberg. 



Electrum. Silver-gold alloy. 6800, Russia. 



Horn silver. Silver chloride ; a very soft waxy mineral, blackening on 



exposure. v 



409, Zacatecas, Mexico. 3551, Idaho ; on kaolin. The dull 

 grey crust of the horn-silver can be clearly seen against the 

 white background. 



Other specimens from Queensland, Idaho, and Chili. 



Bromyrite. Silver bromide. 381, from Chili. 



Argentite. Silver sulphide ; a very soft, black mineral, easily cut with 



a knife-blade, leaving a shining surface. 



8149, Comstock Lode, Nevada ; little black masses in quartz. 



380, Chili ; massive m^gentite. 



8664, Himmelsfiirst Mine, Freiberg, Saxony. 



