274 
CEMENT MATERIALS AND INDUSTRY 
[BULL. 24J 
the other four, located in central and northwestern Ohio, used a mix- 
ture of marl and clay. The limestone plants are the Diamond Portia n< 
Cement Company, of Middle Branch, Ohio; the Ironton Portlai 
Cement Company, of Ironton, Ohio; the Alma Portland Cement Com- 
pany, of Wellston, Ohio, and the Wellston Portland Cement Company, 
of Wellston, Ohio. All of these plants, with the possible exceptioi 
of the new Alma, mix Carboniferous shales with limestone. 
Analyses of limestones and shales used in Ohio. 
LIMESTONES. 
Silica (Si0 2 ) 
Alumina (A1 2 3 ) 
Iron oxide (Fe 2 3 ) . . . 
Lime(CaO) 
Magnesia (MgO) 
Sulphur trioxide (S0 3 ) 
Carbon dioxide (C0 2 ) 
1 
2 
3 
4 
0.86 
3.53 
0.56 
4.20 
.63 
1.03 
} 
1.14 
{ 
1.23 
.29 
1.61 
1.90 
53. 86 
54. 45 
54.45 
50. 6e 
n.d. 
.44 
.36 
.73 
n.d. 
n.d. 
tr. 
.23 
43. 20 
38.74 
43. 17 
40.60 
1.30 
.73 
1.17 
53.34: 
.75 
tr. 
42. 72: 
SHALES. 
Silica (Si0 2 ) 
Alumina ( A1 2 3 ) 
Iron oxide (Fe 2 3 ) 
Lime (CaO) 
Magnesia (MgO) 
Sulphur trioxide (S0 3 ) 
Carbon dioxide ( ( )( >., ) . 
60.00 
23.26 
4.32 
.90 
1.12 
n.d. 
n.d. 
55. 00 
21. 79 
9.26 
n.d. 
n.d. 
n.d. 
n.d. 
60.15 
19.78 
9.10 
.52 
.10 
tr. 
n.d. 
62.67 
19.99 
5.46 
1.25 
.72 
n.d. 
n.d. 
10 
63.30 
26.00 
1.25 
1.25 
n.d. 
n.d. 
ii 
69 
16.4 
2. 2i 
.71 
n.d j 
5.4; 
1, 6. Ironton Portland Cement Company. C. D. Quick, analyst. 
2, 11. Alma Portland Cement Company. Twenty-first Ann.* Kept. U. S. Geol. Survey, pt. 6 (cor ' 
tinued) ; p. 402. 
3, 10. Wellston Portland Cement Company. W. S. Trueblood, analyst. 
4, 5, 7, 8, 9. Diamond Portland Cement Company. E. Davidson, analyst. 
The plants using marl are the Sandusky Portland Cement Comij 
pany, of Bay Bridge, Ohio; the Castalia Portland Cement Company I 
of Castalia, Ohio; the Buckeye Portland Cement Company, of Rush : 
sylvania, Ohio, and the Alta Portland Cement Company, of Rushsyl 1 
vania, Ohio. 
Of these plants the Buckeye and Alta use marl from wet swam ' 
deposits, while the Castalia uses marl from a deposit which is ncn 
practically dry. The Sandusky, having almost exhausted its mai 
deposit, is now using limestone as part of its charge and will probabl 
soon use it entirely. The clays used at all these marl plants ar 
obtained from Quaternary deposits in the immediate vicinity of th ) 
marl beds. 
