518 G. P. Merrill — Minor Constituents of Meteorii 



Copper ..: _ 0-30$ 



Nickel 7-00 



Cobalt 0-20 



Iron 92-04 



99-54$ 

 A bulk analysis, in which all the combined and oxidized iron 

 was determined as ferric oxide, yielded : 



Silica (Si0 9 ) 38-340$ 



Ferric oxide (Fe 2 3 )_._ 8*551 



Alumina (A1 2 3 ) _ 8'259 



Chromic oxide (Cr 2 O s ) 0*587 



Lime (CaO) 1-180 



Magnesia (MgO) 24-040 



Metal (FeNi) ._ 15-000 



Loss on ignition 3-500 



99*457 



Recalculating the first analysis in order to include the com- 

 ponents of the metallic portions, and thus obtain the composi- 

 tion of the stone as a whole, we have : 



Silica (SiOJ 38*340$ 



Ferric oxide (Fe 2 3 ) 8551 



Alumina ( A1 2 3 ) 8*259 



Chromic oxide (Cr 2 3 ) _ . 0*587 



Lime (CaO) 1*180 



Magnesia (MgO)... 24*040 



Loss on ignition _ 3*500 



Iron (Fe) . _ 13*860 



Nickel (Ni).__ 1*050 



Cobalt (Co) 0*030 



Copper (Cu) 0*050 



99*447$ 

 None of the rarer elements were found. 



(8) Meteoric stone. Cullison, Kansas. Described by Mer- 

 rill.* Thin sections showed it to be of the normal chondritic 

 type containing olivine, enstatite, monoclinic pyroxene, plagio- 

 clase feldspar, with the usual sprinkling of metal and metallic 

 sulphides. The separation of the component parts by an 

 electro-magnet and treatment with iodine resulted as follows : 



Troilite ._ 6*07$ 



Metal 19*40 



Silicates _ 74*50 



Schreibersite n -1 



100*07^ 

 * Proc. U. S. Nat. Mus., xliv, pp. 325-30, 1913. 



