FROM BURDWAN. 



173 



No. 3. 



NO LABEL WITH THIS SPECIMEN. 

 Sp. Gr. 3400 



JBlowpipe — becomes magnetic, and fuses with borax into a very dark 

 and somewhat dirty green glass. 



CONSTITUENTS. 



Water, , 



Silex, .... . . . , 



Alumine, 



Lime Pliospliate Iron, 

 Oxide Manganese, 

 Peroxide Iron, . . . , 



6 25 

 8 .50 

 30 

 Traces. 

 



84) 50—59 Iron. 



99 50 



NOTE. 



Ochr)'-red Iron Ore, or red Ochre of Jameson, Vol. III. p. 210. (?) 



No. 4. 



MAL CHAITL 

 Sp. Gr. 3141. 



Blowpipe — becomes magnetic, and acquires the metallic tarnish : 

 with borax on charcoal, fuses into a pitchy slag. 



CONSTITUENTS. 



Water .... 



6 







Silex, ...« «... .. 



4 



50 



Alumine, .... 



1 



75 



Carbonate of Lime, «... 



3 



35 



Oxide of Manganese (red) .... 



16 



00* 



Peroxide of Iron, . . .... 



68 



00—47 5 Iron. 





99 



60 



NOTE. 



The large proportion of Manganese in this specimen is remarkable, but the process used for 

 obtaining it leaves no doubt as to its identity, for the solution of muriate of Ammonia will not dis- 

 solve oxide of Iron. It may be found useful to mix with other ores, which may thus afford better 

 Steel than they otherwise would. See Jameson, Vol. 111. p. 232. 



W 2 



