704 



GEOLOGY AND MINING INDUSTRY OF LEADVILLE. 



Complete analyses of slags. The writer made the following analyses of slags, which 

 reveal a few points which had not been observed before, such as the presence of small 

 quantities of carbonate of lime and of carbon : 



ANALYSES XXX, XXXI, AND XXXII. SLAGS. 

 Elementary. 



a In magnetic oxide. 



ft Reported with FeO and FeiOi. 



