CLARK R.] 
SLATES AND SHALES. 
341 
E. Red slate from quarry 3 miles north of Raceville. 
F. Green spot in E. 
(t. Purple rim of green spot F. 
Analyses by W. F. Hijlebrand, record No. 1656. 
Si0 2 
A1A 
Fe,0 3 
FeO _. 
MgO 
CaO 
Na/_) 
Lo 
H 2 OatllO° 
H 2 () above 110° 
Ti0 2 
I J A 
MnO 
BaO 
bo 2 
FeS, 
88 
77 
86 
44 
.37 
.53 
.20 
.45 
.27 
.48 
.47 
.08 
.21 
.05 
.08 
ace 
100. 14 
65. 44 
9.38 
1.09 
1.06 
4.92 
- 4. 53 
,22 
3. 57 
.25 
2.10 
. 52 
.08 
.32 
. 06 
6.55 
.04 
100. 13 
64. 59 
10. 23 
1.79 
1.19 
5.12 
4.07 
.23 
3. 70 
.28 
2.29 
.51 
.08 
.26 
.05 
5.84 
trace 
100. 23 
Contain trace of lithia and nickel. Fluorine not determined. 
