GUERNSEY COUNTY (OHIO) METEORITES. 331 



3.550, varying slightly in different specimens. In one hundred 



parts there are 



Nickeliferous iron 10.7 



Earthy minerals 89.3 



The nickeliferous particles separated by a magnet from the 

 crushed stone, and well washed, presented the following con- 

 stituents in one hundred parts : 



, Iron 87.011 



Nickel 12.360 



Cobalt .421 



Copper... minute quantity, not estimated 



Phosphorus 012 



Sulphur 1.080 



The sulphur comes from magnetic pyrites that the meteorite 

 contains, and that it is not easy to separate mechanically from 

 the small particles of nickeliferous iron. 



The earthy part, when freed as thoroughly as possible from 



nickeliferous iron (which can be done pretty effectually by the 



magnet), was treated with warm dilute muriatic acid thrown 



on a filter first washed thoroughly with water, then with a 



solution of potash to dissolve the last portion of the silica of 



the decomposed portion of the mineral. The result was, in 



one hundred parts, 



Soluble portion.... 63.7 



Insoluble 36.3 



The earthy material analyzed as a whole was found to 

 contain 



Silica 47.30 



Oxide of iron 28.03 



Alumina .31 



Magnesia 24.53 



Lime .02 



Soda 1 1 04 



Potash } i>U4 



Manganese trace. 



From these results it is very clear that the mineralogical 



constitution of these meteoric stones is about as follows, in one 



hundred parts: 



Nickeliferous iron 10.690 



Schreibersite 005 



Magnetic pyrites .005 



Olivine 56.884 



Pyroxene 32.416 



This sums up the history of this meteoric shower, with as 

 full an account as possible of the stones that fell at that time. 



