IX. 



EXAMINATION AND ANALYSIS 



OF SOME 



SPECIMENS OF IRON ORE, 



FROM BURDWAN. 



By H. PIDDINGTON, Esq. 



In the following Analysis of Iron Ores from Burdwan, much care has 

 been taken to ascertain correctly the presence and quantity of Phosphate 

 of Iron and Manganese,* which two substances principally affect the 

 qualities of the Iron when smelted ; the process was conducted in the 

 humid way, and the separation of the Manganese was obtained by Mr. 

 Faraday's method — ^digestioii of the Oxides in a solution of muriate of 

 Ammonia with sugar. 



No. 1. 



BETWEEN JAMDE AND SUKHRAJ. 

 Sp. Gr. 3143. 



Blowpipe — acquires a metallic tarnish and a shaggy, porous appear- 

 ance, becomes magnetic : with borax or charcoal, fuses into a dark and 



dirty 



* Oxide of Manganese. 



