18 

 Arsenic. 



9 



Chromium. 



Molybdenum. 



Tungsten. 



Uranium. 



Tantalum and Yttrium. 



Metals of the Cerium Group : 



Cerium. 



Lanthanum. 



Didymium. 



Magnesium : 



General experiments. 



Experiments on the production of phosphide of magnesium. 



Alloys of magnesium. 



Glucinum. 



Aluminium : 



Experiments. 



Various forms of the metal. 

 Alloys of aluminium. 



Illustrations of the process of making aluminium alloys by 

 means of Cowle's electric furnace. 



Indium. 

 Miscellaneous Metals. 



Various Non-metals occurring in Metallurgical Opera- 

 tions : 



Selenium. 

 Tellurium. 

 Boron. 

 Silicon. 



Manganese : 



Metal and compounds. 



Alloys. 



