G. P. Merrill — Minor Constituents of Meteorites. 521 



on July 19th of the present year. Contains very little metallic 

 iron, but is correspondingly rich in sulphide. Analyses by 

 Whitfield yielded : 



Schreibersite 0-11$ 



Troilite - 7'56 



Metal 4-85 



Silicates 87"48 



100-00$ 

 The metallic portion yielded : 



Nickel 8-68$ 



Cobalt ._ 0-64 



Copper 0-29 



Iron 90-50 



100-11$ 

 The silicate portion yielded : 



Silica (Si0 2 ) 41-93$ 



Alumina (A1,0 3 ) 4*30 



Ferrous oxide (FeO) 21-85 



Lime (CaO) 2*40 



Soda (N a 2 0) trace 



Magnesia (MgO) 29-11 



Manganous oxide (MnO) 0-25 



Nickel oxide (NiO) 0*08 



None of the rarer elements under consideration were found, 

 even in traces. The sulphide occurs in such forms as to be 

 readily separated mechanically, and yielded on analysis : 



Iron 63-62$ 



Sulphur 36-50 



Nickel, cobalt and copper none 



100-12$ 



This analysis shows the mineral to be troilite, though its 

 specific gravity (4*61) is low. It is, however, wholly unat- 

 tracted by the magnet and apparently there is no question as 

 to its true nature. Its occurrence in this form is interesting 

 in a stone so low in the metallic constituent. 



(11) In addition to the above recorded analyses a 26-gram 

 fragment of the Krasnojarsk pallasite was" sacrificed in a search 

 for arsenic and tin. No trace of either was found. 



The results recorded in the preceding pages afford oppor- 

 tunity for interesting comparisons between the meteorites and 



