CLARKE.] 
CLAYS AND SOILS. 
IDAHO, UTAH. 
3(37 
A. Adobe soil, Salt Lake City, Utah. Analysis by L. G. Eakins, 
record No. 996. 
B. Lava soil, near Shoshone Falls, Idaho. Described by Russell 
In Bull. 199. Analysis by W. F. Hillebrand, record No. 1950. 
Si( >, 
Fe 2 3 (total Fe; 
MgO 
Ca( ) 
Na 2 
H 2 
TiO, 
R,(), 
19. 24 
3.26 
1.09 
2.75 
38. 94 
trace 
trace 
1 . 67 
CO, 
so, 
CI 
MnO 
Organic matter 
29. 57 
. 53 
.11 
trace 
2.96 
100. 35 
52.48 
7.10 
2.63 
2. 93 
14. 00 
. 93 
1.76 
4. 96 
.38 
.20 
12. 40 
trace 
100. 37 
