48 



MERRILL AND STOKES 



The analysis of the non-metallic portion, a, gave : 



100.58 



No BaO or SrO could be detected. The .66 percent CrjOg 

 corresponds to about 1,3 percent chromite. I have isolated a 

 small amount of chromite in a state of imperfect purity by treat- 

 ing a large quantity of the silicate repeatedly with hydrofluoric 

 and sulphuric acids. .1147 gram of this gave : 



Cr^Oj 



AI2O3 



FeO 



MgO 



TiO, 



50.31 

 9.67 



28.78' 

 2.76 

 1.20 



The portion b^ containing all the metal, gave 



II. 



82.748 percent metal. 



17.48 percent stony. 



100.228 



' Total iron as FeO. 



