96 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
Cc D. 
57.78 | 58. 01 
16.28 | 15.72 
1.02 64 
4.92 3. 87 
4.60 2.07 
6. 65 2,15 
3.25 -10 
2.22 4.79 
34 31 
. 92 2.71 
1.07 1.08 
30 31 
-02 | none 
«15 -17 
07 | none 
12 | trace? 
«15 2. 86 
02 1.25 
accent 1.52 
ecaesed -12 
Sierersercts - 86 
ee Sietaeiie +05 
seesm@aes 1.65. 
99. 88 | 100. 24 
E. Altered rhyolite, De Lamar mine, Silver City. Contains quartz, sericite, pyrite, 
apatite, and rutile, with some undeterminable magnesian mineral. Analysis by H.N. 
Stokes, record No. 1731. 
F. Altered rhyolite, De Lamar mine. Contains sericite, quartz, kaolinite, and 
pyrite. Sp. gr., 2.655, 23°. 
G. Altered rhyolite, De Lamar mine. Contains quartz, sericite, kaolinite, and 
pyrite. Sp. gr., 2.576, 24°. 
H. Diabasic basalt, Trade Dollar mine, Silver City. Camptonose. Contains labra- 
dorite, augite, chlorite, magnetite, secondary quartz, etc. 
Analyses F, G, and H, by Hillebrand, record No. 1826. 
Heavy metals not looked for in E. 
I. Quartz monzonite, Schafer Butte, Boise County. Lassenose. Contains quartz, 
orthoclase, oligoclase, biotite, apatite, titanite, and magnetite. Analysis by George 
Steiger, record No. 1802. P. R. ©. 1520. 
J. Granodiorite, Silver Wreath mine, Boise County. Yellowstonose. Contains 
orthoclase, oligoclase, apatite, biotite, titanite, and magnetite. Described in 18th 
Ann., pt. 3, p. 642. Sp. gr., 2.714, 23°. 
