MINERALOGY. 51 



OXIDE OF ARSENIC. 



This is the common arsenic of the shops, and is import' 

 ed from Bengal. 



8?d 8f[g a o3l. ©^o 



RED ORPIMENT. 



Red orpiment, or realger, is found in great quantites 

 in Burmah, and is constantly seen in the bazars. 

 Red sulphuret of arsenic* 



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g5go3( 



YELLOW ORPIMENT. 



This is also a production imported from Burmah, 

 which has not been found in the Provinces. 

 Yellow sulphuret of arsenic. 



2CC?of8a 00080^0^01" 



TUNGSTEN. 



The tungstate of iron, or wolfram sand, much resembles 

 tin, and it is found in most neighborhoods where that ore 

 js obtained, and for which it is often mistaken. One of the 

 Assistant Commissioners at Mergui a few years ago, re- 

 ported several valuable deposits of tin, not before known, 

 and he raised furnaces on the ground to smelt the ore ; 

 but although he tried hard, and increased the heat to the 

 highest point he was capable of doing ; still the ore re- 

 mained refractory, and would not turn into tin. He attri- 

 buted the fault to his furnaces, and came away with large 

 specimens of his tin ore, which proved on examination to 

 be tungsten, or wolfram sand. A magnet will distin- 

 guish the two ores at once, for the iron in the tungstate of 

 iron is attracted by the magnet, while the tin is not. 



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