Art. VII.] 

 Analyses. 



Watson, Virgilina Copper District. 



113 



X. Andesite, Edmund's Hill, Aroostook county, Maine. Analysis by W. 

 F. Hillebrand. Herbert E. Gregory, American Journal of Science, 1899, 

 volume viii, page 36^. 



XI. Pyroxene andesite. Agate creek, Yellowstone National park. 

 Analysis by Whitfield, Bulletin 168, U. S. Geological Survey, 1900, page 108. 



XII. Hornblende andesite, Mount Shasta, California. Analysis by H. N. 

 Stokes, Bulletin 168, U. S. Geological Survey, 1900, page 176. 



XIII. Dark massive greenstone. Lower Quinnesec falls, Michigan. 

 Analysis by R. B. Riggs. G. H. Williams, Bulletin 62, U. S. Geological Sur- 

 vey, 1S90, page 91. 



XIV. Dark schistose greenstone, forming a band in XIII. Analysis by 

 R. B. Riggs. G. H. Williams, Bulletin 62, U. S. Geological Survey, 1890, 

 page 91. 



XV. Greenstone, summit of ridge at Cliff mine. Quoted by A. C. Lane, 

 Geological Report on Isle Royale, Michigan, Geological Survey of Michigan, 

 1898-1897, volume vi, page 215. 



XVI. Meta-andesite, 1.5 miles northward from Jenny Lind. Analysis by 

 W. F. Hillebrand. Bulletin 168, U. S. Geological Survey, 1900, page 203. 



