290 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. 
[NO. 228. 
L. The El Capitan iron, from near Bonito, New Mexico. Analysis 
by H. N. Stokes, record No. 1527. 
M. From La Bella Roca, Sierra de San Francisco, Mexico, State of 
Durango. Analysis by J. E. Whitfield, record No. 1037. Bull. 64] 
p. 28. 
N. Troilite nodule from L, outer part, somewhat altered. 
O. Troilite nodule N, inner part. Analyses N and O also by Whi 
field, record No. 1037. 
P. From Puquios, Chile. Sp. gr., 7.93, 25.2°. Analysis by L. G. 
Eakins, record No. 1181. See Bull. 78, p. 95. 
Q. The Abert iron, of unknown origin. Analysis by R. B. Riggs, 
record No. 356. Sp. gr., 7.89. See Bull 12, p. 91. 
: 
L. 
M. 
N. 
0. 
P. 
Q. 
Fe 
90. 51 
8.40 
.60 
.05 
.24 
t race 
91.48 
7.92 
.22 
9.37 
88. 67 
9.83 
.71 
.04 
.17 
.09 
trace? 
.04 
92.07 
Ni 
7.01 
Co 
.66 
Cu 
P 
.21 
.21 
.08 
S . 
.01 
Si 
C 
.06 
.05 
NiS 
2.07 
37.51 
37.80 
19.85 
2.13 
85. 27 
FeS ' 
Fe.,0 3 
Moisture 
99.80 
100. 10 
97.23 
96.77 
99.55 
99.88 
