432 
CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull.  225. 
Analyses  of  lower  Carboniferous  limestones. 
Number. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
P.  ct. 
0.50 
1.45 
96.58 
2.58 
P.ct. 
1.73 
.78 
96.54 
P.  ct. 
0.77 
.35 
97. 60 
P.  ct. 
1.14 
.31 
98.53 
P.  ct. 
1.02 
1.38 
95. 25 
1.73 
P.  ct. 
1.40 
1.17 
94. 67 
2.  26 
P.  ct. 
0.68 
1.02 
96.54 
1.26 
P.ct. 
0.81 
.89 
97. 45 
.35 
P.  ct. 
0.82 
.60 
97.37 
.75 
.029 
P.  ct. 
2.16 
2.31 
89. 15 
4.20 
Iron  ami  aluminum  <>xi<lr. . . 
Magnesium  carbonate 
Number. 
11. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
P.ct. 
3.12 
2.32 
85.87 
4.20 
P.  ct. 
0.85 
.65 
96.64 
1.36 
.024 
P.  ct. 
1.08 
.61 
96.  91 
.90 
.019 
P.ct. 
0.73 
.65 
97.  60 
.52 
.018 
P.  ct. 
0.64 
.62 
97. 48 
.76 
P.  ct. 
1.12 
.90 
96.38 
1.10 
P.ct. 
0. 42 
.37 
97.  32 
1.  39 
.020 
P.ct. 
2.  05 
.76 
89.64 
8. 15 
P.ct. 
4.45 
3.30 
86.35 
P.  ct. 
2. 80 
.70 
94. 59 
Iron  and  aluminum  oxide. . . 
<  !alcium  carbonate 
Magnesium  carbonate 
1.  Average  sample  from  Fossick  quarry,  near  Rockwood,  Franklin  County.     Analyzed  at  Govern- 
ment Arsenal,  Watertown,  N.  Y. 
2.  Average  sample  from  Blount  Springs  quarry—a  compact  limestone.     Henry  McCalley,  analyst. 
3.  Average  sample  from  Blount  Springs  qua'rry— a  granular  oolitic  limestone.     Henry  McCalley, 
analyst. 
5-9.  Average  sample  Blount  Springs  quarry.    J.  R.  Harris,  analyst. 
10,11.  From  Worthington  quarry,  near  Trussville,  Jefferson  County.    C.  A.  Meissner,  analyst. 
12-17.  From  Vanns,  near  Trussville.    J.  R.  Harris,  analyst. 
18.  Average  of  about  150  feet  thickness  of  rock  used  for  flux,  Compton  quarry,  Blount  County.    J.  L. 
Beeson,  analyst. 
19, 20.  Stockhouse  sample,  Compton  quarry.     Wm.  B.  Phillips,  analyst. 
Analyses  of  Trenton  limestones. 
s 
.1 
f 
I 
Number. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
! 
1 
Silica 
P.ct. 
4.48 
1.22 
88. 85 
3.52 
P.  ct. 
5.70 
1.87 
91. 16 
P.ct. 
2.43 
3.30 
89.88 
P.  ct. 
3.65 
.91 
92.38 
P.ct. 
3.29 
1.49 
92.61 
P.ct. 
3.82 
1.96 
90.44 
P.ct. 
0.39 
.13 
99.11 
.75 
P.  ct. 
0.15 
Tr. 
99.16 
.75 
P.ct. 
0.78 
.35 
97.52 
1.27 
P.  ct. 
1.00 
.30 
97. 00 
Tr.i 
Tr. 
1- 
Iron  and  aluminum  oxides.. 
Calcium  carbonate 
= 
Magnesium  carbonate 
Sulphur 
.1 
F 
Number, 
11. 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
; 
20. 
Silica  
P.ct. 
0.43 
.42 
.  98. 49 
.16 
P.ct. 
0.58 
.25 
95.78 
2.89 
P.  ct. 
0.38 
.47 
98.35 
.30 
P.ct. 
0.34 
.46 
96.53 
2.17 
P.ct. 
0.39 
.37 
94.27 
4.47 
P.ct. 
0.98 
.52 
96.92 
1.08 
P.ct. 
2.50 
1.40 
96. 70 
P.ct. 
2.09 
1.01 
93.77 
2.48 
P.ct. 
1.08 
.63 
98.  91 
.58 
P.  ct. 
2. 2£ 
.68 
95. 4C 
.94 
L. 
11 
Iron  and  aluminum  oxides.. 
Calcium  carbonate 
Magnesium  carbonate 
Sulphur 
1   " 
1.  Average  of  several  carloa 
Company  at  Tuscaloosa,     H. 
2.  Gate  City  quarry,  Jeffei 
analyst. 
(3s  flux 
Buel,  a 
son  Co 
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lalyst. 
unty. 
om  qus 
Averag 
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^ance, 
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Tuscalc 
n  the 
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crushei 
anty,  o 
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lry  Mc 
al  Iron 
"alley, 
