174 



SPECIMENS OF IRON ORE, 



No. 5. 

 PAOLTA KANOWA. 

 Sp. Gr. 3587. 



' JBlowpipe — Scintillates, becomes magnetic, and acquires the metallic 

 lustre ; with borax on charcoal, fuses with slight ebullition into a very 

 opaque green glass. 



CONSTITUENTS. 



Water, .... 

 Silex, .... 

 Alumine, 

 Lime, .... 

 Phosphate, 

 Manganese, 

 Peroxide Iron, 



7 



7 90 



60 



00 

 Trace. 



10 25 



74. 00—51 5 Iron. 



99 75 



. '. . No. 6. 



NO LABEL WITH THIS SPECIMEN. 

 Sp. Gr. 2857. 



Sloivpipe—hecomes magnetic, and externally of a metallic lustre ; 

 with borax on charcoal, a dark enamel. 



The pulverised ore, like No. 1, is of a pale yellow brown, changing to 

 a deep chocolate red in calcination. 



CONSTITUENTS. 



Water and Carbonic Acid, .... 9 50 



Silex, .... 27 50 



Alumine, . . .... .... 1 50 



Oxide Manganese, .... 9 00 



Deut-oxide Iron, .... 51 00 — .37 Iron. 



98 50 



NOTE. 



■ir?i Like No. 1, this specimen acquires weight (about 8^ per Cent.) by digestion in N. Acid: it is 

 certainly too poor an ore to be smelted, unless under very favourable circumstances, but trials might 

 be made of its effect on the qualities of iron produced from mixtures of it with other ores ; there 

 seems to be ground for supposing that Silica sometimes combines with Iron in the metallic state. 



