318 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SURVEY. [no. 228. 
E. Iron carbonate, SE. J sec. 20, T. 47 K, R. 43 W., Michigan. 
F. Iron carbonate, south side of Sunday Lake, Michigan. 
G. Iron carbonate, Palms mine, Gogebic district, Michigan. 
Analyses E, F, and G by W. F. Hillebrand, record Nos. 769, 770, 
771. 
H. Iron carbonate, Miner and Wells option, sec. 13, T. 47 K, R. 
46 W., Michigan. Analysis by T. M. Chatard, record No. 893. 
I. Iron carbonate, NW. 1 sec. 18, T. 47 N., R. 45 W., Michigan. 
Analysis by Chatard, No. 895. 
E. 
F. 
G. 
H. 
I. 
SiO, 
3.16 
28.86 
.20 
1.29 
1.01 
37.37 
.97 
.74 
3.64 
| .68 
trace 
25. 21 
46.47 
.10 
.70 
.86 
28. 57 
.40 
.49 
2.30 
I .60 
trace 
19.24 
46.01 
.12 
.83 
1.35 
26.07 
2.09 
.63 
2.86 
I 1.71 
.07 
17.72 
.15 
36.73 
1 
Ti0 2 
.19 
ALO„ 
.08 
.93 
15.18 
1.15 
26.65 
11.01 
I .54 
.06 
41.10 
.38 
Fe 2 0., 
.98 
FeO 
34.81 
MnO 
.52 
CaO 
.48 
MgO 
2.74 
H 2 at 105° 
.12 
H 2 ign 
1.40 
P 9 0, 
.01 
CO, 
22.44 
so 3 
.16 
CI 
trace 
.34 
(?) 
FeS, 
100. 20 
99.97 
99.73 
99.61 
100. 96 
