ECONOMICAL GEOLOGY. 
245 
abundance of ore beneath the surface, but no openings on the beds which 
have furnished these fragments have been made.” 
The following table presents the analyses of sixteen samples, collected, 
as stated, by Dr. Genth, along the whole length of this range of ore beds 
in 1871 : 
28 
29 
30 
31 32 
33 
34 35 
36 
Silicic Acid, 
. 0.76 
5.68 
0.40 
1.84 1.76 
1.30 
13.75 1.30 
26,80 
Titanic Acid, 
. 13.52 
11.67 
11.95 
13.28 12.35 
13.60 
15.35 1.27 
16.20 
Mag. Ox. Iron, 
. 79.53 
72.74 
81.89 
77.62 77.90 
76 04 
57.93 93.63 
30.90 
Ox. Man. and Cobalt,. 
0.81 
0.64 
1.02 
0.95 1.10 
0.96 
1.15 0.93 
1.55 
Ox. Chomium, ........ 
. 0.46 
0.48 
1.07 
0.65 1.10 
0.72 
1.25 1.43 
0.43 
Alumina, 
. 1.63 
5.08 
1.06 
2.30 2.54 
4 26 
5.17 0.55 
8.87 
Magnesia, 
. 2.79 
2.61 
1.99 
2.01 2.41 
2.33 
4.14 0.75 
10.30 
Lime, 
. 0.45 
0.-76 
0.24 
0.58 0.51 
0.60 
0.90 0.14 
1.40 
Water, 
0.34 
0.38 
0.77 0.79 
0.18 
1.36 
3.55 
100.00 
100.00 
100.00 
100.00 100.00 
100.00 
100.00 100.00 
100.00 
Metallic Iron, 
. 57.68 
52.68 
59.03 
56.21 56.41 
55.06 
41.95 67.60 
21.63 
37 
38 
39 
40 
41 
Silicic Acid, 
0.50 
1.S0 
0.74 
1.39 
0.98 
Titanic Acid, .... 
12.27 
11.46 
13.92 
0.78 
2.42 
Mag. Ox. Iron, . . . 
79.16 
74.81 
76.80 
42.77 
46.29 
Ox. Man. and Cobalt,. . , 
1.21 
1.53 
1.30 
1.00 
1.27 
Ox. Chomium,.. 
0.5J 
0.97 
1.07 
0.30 
trace. 
Alumina, ....... 
3.62 
2.66 
3.82 
52.24 
44.86 
Magnesia, 
/ 
2.0-1 
3.09 
1.80 
0.68 
3.27 
Lime, 
0.63 
0.69 
0.55 
0.84 
0.91 
Metallic Iron 
3 * ’ * • B 
. . . 100.00 
100.00 100.00 
100.00 100.00 
57.32 
54.17 
55.61 
30.97 
33.52 
The following 
are Di 
r. G.’ 
s notes 
in part : “ 
Nos. 
28 and 29. K. B. 
Swain, Davidson 
county. 
The ores 
on this place are 
both massive and 
granular magnetite, with small admixtures of greenish chlorite, mostly 
between the fracture plants, partly altered to the above-mentioned silverv- 
white or brownish-white micaceous mineral, and those in which the latter 
forms a conspicuous constituent. Both kinds were analyzed ; 28, the 
massive ore ; 29, the micaceous. 
No. 30. Elisha Charles, Guildford county. The ore is granular, iron- 
black, with small quantities of the silvery micaceous mineral. 
No. 31. Widow Cook. The ore is similar to the last, although a little 
more chloritic and micaceous in little patches throughout the mass. 
