70 
CEMENT MATERIALS AND INDUSTRY. 
Analyses of crystalline marbles. 
[BULL. 24.1. 
Number. 
I 
2 
3 
4 
5 
6 
i 
Silica (Si0 2 ). 
Tr. 
2.70 
2.95 
4.65 
2.80 
1.35 
.28 
Iron oxide 
and alumina 
(FeoOj and 
Alo0 3 ). 
0.40 
1.15 
.75 
.48 
.30 
.28 
Lime car- 
bonate 
(CaC0 3 ). 
99.47 
90.80 
95.25 
94.40 
95. 60 
97.60 
99.19 
Magnesium 
carbonate 
(MgCO s ). 
0. 30 
Tr. 
.62 
.41 
.66 
Tr. 
.14 
1. Herd's upper quarry, Talladega County. Tuomev's Second Report, Geology of Alabama. 
2. Herd's quarry, sec. 16, T. 21, R. 4 E., Talladega County. Wm. B. Pbillips, analyst. 
3. Taylor's mill, Talladega County, white marble. Wm. C. Stubbs, analyst. 
4. Taylor's mill, Talladega County, blue marble. Wm. C. Stubbs, analyst. 
5. Taylor's mill, Talladega County. A. F. Brainerd, analyst. 
6. Nix quarry, sec. 36, T. 20, R. 4 E., Talladega County, white marble. Wm. B. Phillips, analyst. 
7. Gannt's quarry, sec. 2, T. 22, R. 3 E., Talladega County, white marble. A. F. Brainerd, analyst. 
A nalyses of clays — Paleozoic and lower Cretaceous. 
Number. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
Id 
II 
II* 
13 
14 
15 
16 
17 
is 
19 
•jo 
•J I 
22 
23 
Silica 
(SiOo). 
61.55 
57. 80 
79.80 
82.04 
66.25 
82. 1 1 
60.50 
72.20 
57. 00 
67. 95 
61. 50 
84.21 
66.61 
62.60 
60.38 
65.82 
74.25 
61.25 
65.35 
60.03 
58.13 
68.23 
60.90 
Alumina 
(A1 2 3 ). 
20. 25 
25.00 
11.75 
12.17 
22.90 
11.41 
26.55 
22.04 
17.80 
20.15 
26.20 
9.75 
21.04 
26.98 
20.21 
24.58 
17.25 
25.60 
21.30 
24.66 
24.68 
20.35 
18.98 
Iron oxide 
(Fe 2 3 ). 
7.23 
4.00 
1. 75 
Tr. 
1.60 
1.40 
.30 
.16 
5.60 
1.00 
2.10 
.69 
2.88 
.72 
6.16 
1.25 
1.19 
2.10 
2.72 
3.69 
3.85 
3.20 
7.68 
Lime 
(CaO). 
Tr. 
2.10 
.75 
Tr. 
Tr. 
Tr. 
.90 
.50 
2.10 
1.00 
.50 
.70 
.40 
.40 
.09 
.40 
.25 
.60 
.13 
.15 
.34 
Tr. 
Magnesia 
(MgO). 
0.99 
.80 
Tr. 
.33 
Tr. 
.66 
.65 
.40 
1.20 
Tr. 
.43 
.14 
.58 
.36 
.72 
Tr. 
Tr. 
.82 
.86 
.38 
.32 
Tr. 
Tr. 
Alkalies 
(KoO, 
Na 2 0). 
Ignition. 
1.25 
6.19 
1.80 
7.50 
1. 50 
4.11 
.60 
4.33 
.75 
9.05 
1.80 
4.00 
2.70 
7.90 
.60 
5.80 
6.00 
9.45 
1.87 
8.00 
.70 
7.29 
4.10 
.70 
7.00 
.65 
9.30 
1.80 
10. 21 
.60 
8.16 
.52 
6.30 
1.35 
8.10 
Tr. 
8.79 
Tr. 
11.34 
1.78 
11.78 
.74 
7.16 
Tr. 
13.63 
Total. 
! 
98. 
99.00 
99.16 
99.47 
100. 55p 
101.38 j 
99. 50 j 
101. 70 ij 
99. 15 i 
99.97 
98.72' 
99.59 1 
99. 21 j s 
101.01 
99. 57 
100. 41 
99.39 
99.471 
99.62 
100. 23 
100.51 
100. 02' 
100.95 
