CLARKE.] 
SLATES AND SHALES. 
339 
J. Slate from Guilford, collected for the Educational Series of Rock 
Specimens. Analysis by L. G. Eakins, record No. 1310. 
K. Slate from the Lakeshore quarry, Hydeville. Analysis by 
Eakins, record No. 1159. 
teo 2 . 
ki 2 o 3 
Fe 2 3 
FeO . 
kgO. 
CaO . 
H 2 0. 
Ti,0 . 
pa_ 
MnO 
S0 3 . . 
a... 
60. 72 
22.59 
6.03 
2. 05 
.41 
.86 
3. 69 
3. 01 
.13 
trace 
57 
100. 06 
58.15 
18. 93 
2. 91 
5. 64 
2.70 
.60 
1.17 
3.92 
4. 56 
.93 
.12 
.07 
.16 
99. 86 
