318 GEOLOGY AND MIXING INDUSTRY OF LEADVILLE. 



Pago. 



R^sum6 — Coutinued. 



Decomposition of rock conBtituents 356 



Negative observations 357 



Chemical composition ; 357 



Notes on the Henry Mountain rocks 359 



Hornblendic rocks 359 



Augitic rocks - 361 



R6sumd 36-2 



