356 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. [no. 22^ 
Clays collected by G. H. Eldridge. 
D E. From the Sandlin place, 2 miles southeast of Marion, Hamil 
ton County. 
F. From Richmond's, 6 miles south of Leesburg, Lake County. 
G, H. From Bartow Junction. 
Analyses D, E, and F by H. N. Stokes, record No. 1493; G and 
by George Steiger, No. 1545. 
SiO a 
A1A 
Fe 2 3 
FeO 
MgO 
CaO 
H 9 at 100 c 
co 9 
15.68 
.61 
.45 
17.28 
26.11 
1.97 
trace 
37.90 
100. 00 
78. 23 
7. 30 
1.85 
2.11 
1.60 
"8.48 
trace 
99.5' 
F. 
84. 41 
11.02 
trace 
trace 
.20 
«4. 25 
I race 
99.88 
G. 
79. 99 
10.82 
3.25 
.25 
.07 
.23 
.90 
4.09 
none 
99. 87 
79.4; 
12.1 
2.64 
.J 
.0/ 
.31 
.86 
4.7S 
100. 32[ 
"Includes a little C< >•_.. 
I. "Filtering clay," Ocala. Received from D. T. Day. Analysis 
by H. N. Stokes, record No. L738. 
Si0 2 36. 73 
A1 2 3 27.78 
Fe 2 3 - -- 3.21 
MgO 64 
CaO 81 
Na 2 none 
K 2 42 
H 2 at 110° 7.38 
H 2 above 110° 
Tin., 
12.14] 
1.27't 
P..O\ 
5. 54 ^ 
Co., 
none] 
( )rganic matter 
3.61 
99. 531 
