CONTKNTS. 
xxix 
Page. 
Chapter XXVII. — concluded. 
Possibility of washing, concentrating, and 
briquetting smalls and fines . . . . 574 
Methods of Mining, Washing, Briquetting, etc., used 
Abroad 574 
Briquetting in Brazil ..... 574 
H3^draulicking and washing at Crimora in Virginia 575 
Methods of mining, washing, etc., employed in 
Panama ....... 577 
Mining of manganese-ore deposits in other parts 
of the world 578 
Grant of Mineral Concessions in India . . . 580 
Chapter XXVIII.— The Uses of Manganese. 
Uses in Metallurgy ...... 
History of the application of manganese in the 
iron and steel industry 
Spiegeleisen and ferro -manganese 
Manufacture of spiegeleisen and ferro-manganese 
Manufacture of ferro-manganese in India . 
Use of spiegeleisen and ferro-manganese 
Quantity of manganese required in the manufac 
ture of steel ..... 
Phosphorus and silicon in spiegeleisen and ferro 
manganese. 
Use of the Indian phosphoric ores 
Use of manganese for de-sulphuriz'ng 
Manganese in foundry practice. 
Manganese -steel 
Effects of manganese on iron and steel 
Other manganese alloys . 
Silicon-spiegel 
Manganese-bronze . 
Metallic manganese 
The smelting of manganese-ores by the natives 
of India .... 
Kheri 
Use of manganese as an oxidizer 
For the decolourization of glass 
For bleaching powder, bullion melting, and 
potassium permanganate .... 
582 
582 
583 
584 
586 
588 
588 
589 
mo 
500 
591 
591 
592 
594 
594 
594 
594 
595 
595 
597 
600 
601 
