MINERALS. 287 
LEPIDOLITE. 
Micas A to G from various localities in Maine. Analyses by R. B. Riggs. Discus- 
sion by I. W. Clarke in Bull. 42. 
A. From Black Mountain, Rumford. Lilac-purple, granular. 
B. From Mount Mica, Paris. Broadly foliated. 
C. From Hebron. Purple, coarsely granular. 
D. From Auburn. Purple border on plates of muscovite. 
E. From Auburn. Purple, coarsely granular. 
F. From Norway. White, coarsely granular. 
G. From Norway. Brownish, finely granular. 
A B c D. E F a. 
49.62+| 51.11 | 49.52] 50.17 
27.30 | 25.26 | 28.80} 25.40 
31 +20 -40 -87 
07 .07 224 245 
55 elt -07 .23 
daeaeees -12 -13 | undet. 
este -O1 -02 | undet. 
434] 4.98] 3.87 4.03 
2.17) 1.43 13 
8.03} 10.51] 8.82 || 13.40 
2.44| 1.29] 3.73 
.72 245 -08 
1.52 94] 1.72 2.02 
5.45] 6.57 | 5.18 5.05 
102.52 | 103.11 | 102.71 | 101.62 
2.29] 276) 2.18 2.13 
100.23 | 100.35 | 100.53 | 99. 49 
Analyses H to L, of lepidolites from San Diego County, California, by W.T. Schaller. 
H. Red purple lepidolite, Pala. Tourmaline Queen mine. 
I. Blue purple, same locality as A. 
J. Purple lepidolite, Pala. 
K. White lepidolite, Pala. 
L. Lepidolite border on muscovite, Mesa Grande. 
M. Lithia mica, Cassiterite Creek, Cape York, Alaska. 
Intermediate between lepidolite and zinnwaldite. Analysis by Schaller. 
