CLARKE.] 
CLAYS, SOILS, ETC. 
303 
NEVADA. 
A. Grayish cla} T from Upper Lahontaa lake beds, Humboldt River 
bridge, Mill City. 
B. Grayish clay, Lower Lahontan beds, same locality. Analyses by 
T. M. Chatard, record Nos. 32, 33. 
C. Adobe soil, Humboldt. Analysis by L. G. Eakins, record No. 
981. 
D. Halloysite, pale greenish, Lucia mining district, Elko County. 
Analysis by George Steiger, record No. 1472. 
A. 
B. 
c. 
D. 
Si0 2 
56. 30 
16.52 
5.08 
50.70 
\ 19.01 
44.64 
13. 19 
5.12 
42.11 
33. 83 
.04 
.28 
.30 
. 33 
ALO, 
Fe 2 3 
FeO 
MgO 
2.64 
5. 45 
2. 60 
2.17 
• 9. 78 
3.19 
10.26 
1.91 
2.16 
■ 13. 03 
2.96 
13. 91 
.59 
1.71 
> 3. 89 
.94 
.13 
CaO 
Na 2 
K 2 
H 2 at 100° 
(>. 54 
1.07 
1.26 
12.04 
trace 
H 2 at 200° 
H 2 at 300° 
H 2 ignition 
P 9 0c 
MnO 
CuO 
2. 83 
co 2 
8.55 
.64 
.14 
3.43 
so, . 
CI 
100. 54 
100. 26 
99.84 
100. 63 
