454 BE. W, FLIGHT, GKEENLAND METEORITES. 



magnetite in or near other Ovifak irons, Wohler, regards the 

 substance constituting the veins as an intimate mixture of 

 magnetite, of which there would be 40 • 20 per cent., with metallic 

 iron, of which there would then be 46 '60 per cent., the sulphide, 

 carbide, and phosphide, as well as the alloys with nickel and co- 

 balt, and some carbon in isolated particles. The latter probably 

 undergo no change when the magnetite and carbide, by the action 

 of heat, generate carbonic oxide. 



A specimen of the iron from the basalt has also been investi- 

 gated by Daubree ; he descril)es it as having a metallic lustre and 

 being nearly black. He found its composition to be : — 



I. 



Iron in the free state 





- 40-940 



Iron in combination 





- 30-150 



Carbon in the free state 





- 1-640 



Carbon in combination 





- 3-000 



Nickel - 





- 2-650 



Cobalt 





- 0-910 



Phosphorus 





- 0-210 



Arsenic - 





- 0-410 



Sulphur - 





- 2-700 



Silicium - 





- 0075 



Nitrogen - 





- 0-004 



Oxygen - 





- 12-100 



Water (hygrometric) 





- 0-910 



Water in combination 





- 1-950 



Chromium, copper, &c. 



- 



- 1-010 



Calcium sulphate, chloride, &c. 



- 1-354 



100-013 



In his second paper he gives analyses of two more specimens : 

 II. Light-grey iron, possessing metallic lustre. It is not 

 homogeneous, as it might be assumed to be from its lustre and 

 colour. When crushed in a mortar, it is divided into two parts : 

 the one crumbles to fine powder, the other is flattened into plates, 

 requiring much trituration to break them up. III. Metallic grains 

 mechanically separated from the rocky portion in which they were 

 distributed. These spherules exhibit figures, when etched, and 

 contain silicate distributed in very fine particles throughout their 

 mass ; in one rounded fragment the silicic acid of this silicate 

 amounted to 11-9 per cent, of the total constituents. 





II. 



III. 



Iron in the free state 



- 80-800 



61-990 



Iron in combination 



- 1-600 



8-110 



Carbon in the free state - 



- . 0-300 



1-100 



Carbon in combination - 



- 2-600 



3-600 



Silicium - - - 



- 0-291 



— 



Water - 



- 0-700 



— 



Calcium chloride 



- 0-233 



0-146 



Iron chloride 



- 0-089 



0-114 



Calcium sulphate 



- 0-053 



0-047 



Copper - - - 



trace. 



trace. 



