CLARK K.] 
CLAYS AND SOILS. 
361 
MISSOURI, ARKANSAS. 
A. Typical loess, Kansas City, Missouri. Dried at 100°. Described 
by Chamberlin and Salisbury, 6th Ann., p. 282. Analysis by R. B. 
Rig'gs, record No. 291. 
B, C, 1), E. Tallow clays, Joplin, Missouri. Collected by AY. P. 
Uenney. Analyses by T. M. Chatard, record No. L210. 
F, Tallow clay, Aurora, Missouri. Collected by Jenney. Analy- 
sis by Chatard, No. 1210. In analyses B, C, D, E, and F the per- 
centages of bases relate to the portion soluble in hydrochloric acid. 
Analyses only partial. 
♦ 
A. 
B. 
c. 
IX 
E. 
F. 
Insolul )le 
-10.64 
43. 07 
39. 34 
39. 62 
34. 04 
SiO, 
74. 46 
12.26 
3. 25 
.12 
1.12 
1.69 
1.43 
1.83 
A1 2 3 
Fe 2 ? 
5. 72 
1.30 
7.60 
1.12 
6. 1 7 
1.16 
6. 45 
1.53 
10.01 
3. 62 
FeO 
Mg< ) . 
CaO 
.27 
1.80 
.32 
1.70 
.27 
2.13 
.30 
1.77 
.25 
2.09 
Na.,< ) 
K.,0 
H.,0 
2.70 
.14 
.09 
17.19 
16.74 
17.63 
16. 95 
16. 96 
Ti0 2 
P,(\ 
MnO _ _ 
.02 
.49 
.12 
.06 
.05 
ZnO .. 
CO, 
32.46 
29. 43 
34. 28 
:;:;. 55 
33. 49 
C, organic 
S0 3 
CL. 
99. 83 
99.38 
99.98 
100.98 
100. 17 
100. 46 
