164 



THE SAN EMIGDIO METEORITE. 



in order to avoid being gnilty of any intentional exaggeration, I have 

 merely indicated these obscure portions by the finely dotted areas in 

 Figs. 1 and L'. 



The chemical investigation of the stone was rendered somewhat nil- 

 satisfactory owing to the badly oxidized condition of the metallic por- 

 tions. For the results given below I am indebted to Mr. J. E. Whitfield, 

 of the U. 8. Geological Survey. 



The complete analysis gave: 



The metallic portion yielded 



Fe 

 Ni 

 Co 



Per cent. 



88. 25 

 11. 27 



100.00 



The soluble portion is presumably all olivine together with pyrrhotite 

 and secondary iron oxides. An analysis of this portion was rendered 

 of no value from the fact that the first attempt at a complete separa- 

 tion of the two silicate minerals by digestion in dilute hydrochloric 

 acid was a failure, and the badly weathered condition of the stone ren- 

 dered a second attempt scarcely worth the while. The insoluble por- 

 tion was separated by prolonged digestion in dilute hydrochloric acid, 

 followed by boiling sodic carbonate. The remaining powder showed 

 under the microscope very pureenstatite fragments, together with rarely 

 a minute grayish particle that acted but faintly on polarized light and 

 the exact mineralogical nature of which could not be ascertained. Mr. 

 Whitfield's results on this powder were as follows: 



This, it will be observed, is a highly ferriferous enstatite (bronzite)J 

 with perhaps a small admixture of a lime- bearing pyroxenic mineral, as 



indicated by the microscope. The relative proportions of the various 



