278 ANALYSES OF ROCKS’ AND MINERALS, 1880—1908. 
G. North fork of Washougal River, Skamania County, Washington. Analyses E, 
F, G, by W. T. Schaller, and discussed by him in Bull. 262. 
100.77 | 100.03 
a Loss on ignition. 
TOURMALINE. 
LITHIA TOURMALINE. 
Analyses A to H, inclusive, by R. B. Riggs. Discussed by Riggs in Bull. 55. 
A. Pink center of crystals having a green margin, from Calhao, province of Minas 
Geraes, Brazil. Sp. gr., 3.028. 
B. Pale green, border of A. 
C. Olive green, also from Calhao, Brazil. 
D. Rose colored, massive, from Black Mountain, Rumford, Maine. Sp. gr., 2.997. 
E. Dark green, massive, same locality as D. 
3.19 - 26 6. 43 
2. 22 ~35 32 
04 - 07 none 
38 - 56 34 
1.61 1. 59 95 
2. 70 2.18 2. 86 
28 44 38 
14 - 28 16 
99. 53 | 100. 29 99. 81 
0 -12 07 
F. Colorless to very pale pinkish or greenish crystals, Auburn, Maine. Sp. gr., 3.07. 
G. Light-green crystals, Auburn, Maine. 
H. Dark-green, massive tourmaline, Auburn, Maine. 
I. Pink, Mesa Grande, San Diego County, California. 
J. Pale green, Mesa Grande. 
K. Pale-rose color, Island of Elba. Sp. gr., 3.04-3.05. Analyses I, J, K, by W. 
T. Schaller. Titherto unpublished. 
