198 



THE GEOLOGY OF MINNESOTA. 



SYSTEMATIC TABLE OF THE QUALITIES 



1. CRYSTALLINE. 



2. QUAKTZYTE. 



12 0.09 



2.31 



84 52 



12 33 



2 12 



31 



Trace. 



0.11 



31 



3. DOLOMITES. 



4. DO LOM ITIC MM ESTO N ES . 



*Analyzed by \V. A. Noyes. 

 traces of titanium (Noyes). 

 trace of lithia. 



tAnalyzed by S. P. Peekham. JWith a small amount of iron. SWith some silica. **Witli 

 ttWitu a small amount of alumina. JtWith traces of silica and nlumina. j?With a minute 



