68 
CEMENT MATERIALS AND INDUSTRY. 
| HILL. 243. 
because inaccessible, the clays mentioned below (tabulated on page 71) 
arc worthy of consideration: 27, from Bexar; 28, from Briggs Fred- 
ericks', in sec. 8, T. 10, R. 13 W. The last is from the great clay 
deposit which gives the name to Chalk Bluff and which underlies 
about two townships; 29 is from a locality about 16 miles southwest 
of Hamilton, the count}*- seat. 
No. 30 is from a locality near the Mississippi line, in sec. 20, T. 8, 
R. 15 W., in Franklin County, from land of Mr. Thomas Rollins. 
Of the numerous fine clays of Colbert County analyses are given of 
two from Pegram station, on the Southern Railway near the Missis- 
sippi State line. These are Nos. 31 and 32. 
ANALYSES. 
Analyses of Mississippian limestones from Alabama. 
Number. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
Silica 
(Si0 2 ). 
0.50 
1.73 
.77 
1.14 
1.02 
1.40 
.68 
.81 
.82 
2.16 
3.12 
.85 
1.08 
.73 
.64 
1.12 
.42 
2.05 
4.45 
2.80 
Iron oxide 
and 
alumina 
(Fe 2 Oj and 
Al 2 6 3 ). 
1.45 
.78 
.35 
.34 
1.38 
1.17 
1.02 
.89 
.60 
2.31 
2.32 
.65 
.61 
.65 
.62 
.90 
.37 
.76 
3. 30 
.70 
Lime 
carbonate 
(CaC0 3 ). 
96. 58 
96.54 
97. 60 
98.53 
95.25 
94.67 
96.54 
97.45 
97.37 
89.15 
85. 87 
96.64 
96.91 
97.60 
97.48 
96.38 
97. 32 
89.64 
86.35 
94.59 
Magnesium 
carbonate 
(MgC0 8 ). 
2.58 
1.73 
2.26 
1.26 
.35 
.75 
4.20 
4.20 
1.36 
.90 
.52 
.76 
1.10 
1.39 
8.15 
Sulphur 
(S). 
0.029 
.024 
.019 
.018 
020 
1. Average sample from Fossick quarry, near Rockwood, Franklin County. Government Arsenal, 
Watertown, Mass., analyst. 
2. Average sample from Blount Springs quarry— a compact limestone. Henrv McCalley, analyst. 
3. Average sample from Blount Springs quarry— a granular oolith limestone. Henrv McCalleyJ 
analyst. * 
4. Average sample upper 75 feet, Blount Springs quarry. J. L. Beeson, analyst. 
5-9. Average sample Blount Springs quarry. .1. R. Harris, analyst. 
l^'lb E rom Worthington quarry, near Trussville, Jefferson County. ('. A. Meissncr, analyst. 
12-1/. From Vanns, near Trussville. J. R. Harris, analyst. 
18. Average of about 150 feet thickness of rock used for flux, Gompton quarry, Blount County. J. L, 
Beeson, analyst. H ' * 
19,20. Stockhouse sample, Compton quarry. Wm. B. Phillips, analyst. 
