234 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. 
[BULL. 168. 
4:. TANEY COUNTY, MISSOURI. 
Analysis by J. E. Whitfield, record No. 736. See Bull. 60, p. 106. 
Sp. gr., 4.484. 
A. The separated nickel-iron. 
B. The stony portion as a whole. 
C. Silicates soluble in hydrochloric acid, recalculated to 100 per cent. 
D. Insoluble silicates, recalculated to 100 per cent. 
A. 
B. 
c. 
D. 
Fe 
89. 41 
10.41 
.29 
.16 
Si0 2 
45.88 
7.89 
19. 73 
6.02 
17.96 
1.67 
.54 
26.95 
17.69 
35.98 
15.98 
3.40 
52.39 
7.11 
14.68 
4.49 
21.33 
Ni 
A1 2 3 
Co 
FeO 
P 
CaO 
MgO 
100. 27 
MS 
FeS 
99.69 
100. 00 
100. 00 
5. WASHINGTON COUNTY, KANSAS. 
Fell July 25, 1890. Analyzed by L. G. Eakins, record No. 1227, -and 
described in Bull. 90. 
45. Sp. gr. 3.49, 21. 
Composition of the mass. 
Nickel-iron 7. 7 
Troilite 5.0 
Soluble silicates 46. 
Insoluble silicates 41. 5 
100.2 
Separate analyses. 
A. The nickel-iron. 
B. Silicates soluble in hydrochloric acid, calculated to 100 per cent. 
C. Insoluble silicates, calculated to 100 per cent. 
Fe 
Ni 
Co 
86. 
76 
12 
18 
83 
99.77 
Si0 2 .. 
A1 2 3 . 
OA- 
FeO.. 
MO.. 
CoO.. 
MnO. 
CaO.. 
MgO. 
38. 50 
Na 2 
23.54 
.69 
trace 
.34 
.12 
36.81 
100. 00 
53.80 
4.32 
1.41 
• 11.98 
trace 
4.08 
22.37 
.27 
1.77 
100. 00 
