52 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
D. Red soda granite. Liparose. Contains feldspar, quartz, chlorite, some mus- 
covite, rutile, leucoxene, hematite, and apatite, with sometimes secondary calcite. 
Granular variety. Analysis by W. F. Hillebrand, record No. 495. Dried at 110°. 
E. Same as D, porphyritic variety. Toscanose. Called by Bayley a quartz kerato- 
phyre. Analysis by Hillebrand, record No. 497. 
F. Similar red porphyry, Little Brick Island, Lake Superior, near Pigeon Point. 
Liparose. Consists chiefly of feldspar and quartz, with augite occasionally present. 
Analysis by lL. G. Eakins, record No. 1059. 
G. Red feldspar, anorthoclase, separated from D. Contains hematite inclusions. 
Analysis by J. E. Whitfield, record No. 521. Dried at 104°. 
H. Dark vitreous quartzite. Contains quartz, a little red feldspar, some chlorite, 
some green mica, a few scales of biotite, and grains of magnetite. P.R. C. 1007. 
I. Lighter interbedded quartzite. Feldspar in it much altered. P. R. C. 1004. 
J. Epidotic quartzite. P. R. C. 1023. 
K. Unaltered quartzite. P.R.C.1006. 
Analyses by R. B. Riggs, record Nos. 569, 571, 572, 575. Material dried at 105°. 
