366 DANVILLE (ALA.) METEORITE. 



orite, it is nevertheless an important guide. It was found to 

 consist of 



Silica 50.08 



Alumina 4.11 



Protoxide of iron 19.85 



Magnesia 20.14 



Lime 3.90 



98.08 

 From all the circumstances connected with this mineral, its 

 physical characters, etc., it is doubtless a pyroxene of the augite 

 variety. 



The soluble portion, owing to the unavoidable presence of a 

 little iron and pyrites, simply furnished results on analysis that 

 showed it to be mostly olivine. The stony matter, as a whole, 

 freed as much as possible from pyrites and nickeliferous iron, 



Silica 45.90 



Protoxide of iron ; 23.64 



Magnesia 26.52 



Alumina 1.73 



Lime 2.31 



Soda 51 



Potash .64 



Oxide of manganese, a minute quantity, not estimated. 



Oxide of chrome, 



Phosphorus, 



Lithia — marked reaction with the spectroscope. 



Sulphur * 1.01 



The excess in the footing up of the analysis above one 

 hundred per cent, is due to the fact that a part of the iron, 

 estimated as protoxide, is combined with sulphur, forming sul- 

 phide of iron. 



This meteoric stone is similar in every respect to that which 

 fell, March 28, 1859, in Harrison County, Ind. (which locality I 

 see referred to in catalogues of meteorites as Harrison County, 

 Ky.) This meteorite is therefore composed of nickeliferous 

 iron, olivine, pyroxene, protosulphide of iron, with minute 

 quantities of schreibersite, chrome iron, and probably albite. 



In concluding these observations on the Danville meteorite 

 I can not but feel more and more convinced of the importance 

 of a thorough re-examination of the mineral nature of the me- 

 teoric stones; and in the present case I am not at all satisfied 

 that the mineral characteristics are perfectly made out. 



