238 Ananlysis of Iron Ores from Tavoy and Mergui, [No. 135. 



No. 1. — Boulders of iron ore picked up at the landing place of the 

 island above mentioned. 



No. 2. — Pieces knocked off large masses at landing place. 

 No. 3. — Pieces dug up on the hill. 

 No. 4. — Specimens of limestone. 



London, 13, Charlotte Street, Bedford, Square, 1§th Nov. 1842. 



I have now the pleasure of handing you the details of my examina- 

 tion and analysis of the several ores of iron and the limestones from 

 Tavoy and Mergui, with which I have been almost constantly occupied 

 during the last fortnight. 



1st. Compact magnetic iron ore. — Tavoy, No. 1. 



Colour iron black with a metallic glimmer, fracture fine grained, 

 possesses magnetic polarity, specific gravity 3.511, compared to water 

 = 1,000. 



It yields in analysis the following constituents : 



Peroxide of iron 865 equivalent to 60*55 metal. 



Silica with a trace of phosphate ) «.* 

 of lime, J 



Water, — ... 100 



100.0 

 It contains no manganese or titanium. 

 2d. Compact magnetic iron ore. — Tavoy, No. 4. 

 External and Magnetic characters as above. 

 Specific gravity, 3 -462. 

 It yields in analysis : 



Peroxide of iron 86*0 equal to 60 2 metal. 



Silica 



lica with a trace of phosphate) ~ q 

 of lime, J 



Water, 13-1 



100 



It contains neither manganese nor titanium. 



3d. Tavoy ore, No. 2. — External characters as above. 



Specific gravity, 4369. 



4th. Tavoy ore, No. 3. — Characters as above, as to aspect and 

 magnetism. 



