244 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. xxxn. 



and V), and the alkalies (VI), each being determined in .separate por 

 tions. The values obtained are as follows: 

 7 



Fe 

 Ni 

 [Co 

 II. 8 . 

 III. P. 



IV., 



07 



.73 



.031 



1.42 



.03 



SiO., IcS. 28 



FeO 9.06 



AUO3 - 50 



Cat) ! 99 



MgO 1<S. 16 



SiO, 23.00 



FeO 4. 92 



AI2O3 2.10 



V.-ICaO 1.51 



MgO 8. 27 



Fe.^04 ( magnetite ) 15 



C (graphite) 015 



Vl/l^'^O 16 



^ ^- \Na2O 68 



Insoluble silicates 40. 670 



Magnetite 150 



Graphite 015 



99. 736 



From these several values the approximate composition of the mass 

 may be arrived at as given below: 



Iron 7. 070 



Nickel 7:^0 



Cobalt 031 



Troilite 3. 890 



Schreibersite 200 



Ohvine 46. 990 



In the analyses alcove given the absence of copper in the native 

 metals and chromite among the compoiuids is to be noted. Attention 

 is also to be called to the presence of carbon as graphite, occurring as 

 graphitic chondrules, which may or may not be contained in or sur- 

 roLuiding particles of the native metals. The occurrence of the graph- 

 ite is especially interesting, since the relatively large amounts of it 

 do not appreciably affect the color of the groundmass. 



