362 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY 
The following partial analyses by H. N. Stokes, record No. 1260, all 
relate to tallow clays collected by W. P. Jenney. The same remarks 
apply as to B, C, D, E, and F. 
G. Cave Springs mine, Jasper Count} T , Missouri. 
II. Great Western mine, Granby, Missouri. 
I, J, K. Woodcock mine, Granby, Missouri. 
L. Coon Hollow, Boone County, Arkansas. 
Material dried at 103°. 
G. 
H. 
I. 
J. 
K. 
L. 
Insolul >le 
34.89 
16.75 
7. 38 
10. 34 
14.35 
1.55 
. 35 
10. 37 
11.25 
32. 89 
10. 78 
3. 89 
29.54 
2. 65 
.90 
8.22 
2.41 
36. 71 
8.21 
2.75 
38. 59 
2.77 
.78 
7.99 
16*17 
28.62 
8.93 
5.98 
26. 23 
2.01 
.46 
9.19 
3. 85 
37. 08 
0. 46 
3. 49 
38 90 
2.56 
.42 
7.52 
18. 18 
Soluble SiO 
Al 2 O s 
29.02 
6.34 
Fe 2 3 
4.40 
ZnO 
30. 50 
CaO 
1.91 
MgO 
.75 
Ignition 
8.36 
95. '.is 
100. 12 
100.21 
97. 59 
100. 28 
99. 46 
