CLARKE.] 
CARBONATE HOCKS. 
258 
NEW YORK, PENNSYLVANIA, MARYLAND. 
A. Dolomite-marble, New York Quarry Company, Tuckahoe, West- 
chester County, New York. Analysis by W. F. Hillebrand, record 
No. 746. 
B. Hydraulic-cement rock, Akron, New York. Analysis b}^ George 
Steiger, record No. 1655. 
C. Compact gray limestone, G reason, Pennsylvania. Analysis by 
E. A. Schneider, record No. 1279. 
D. Dolomite-marble, Cockeysville, Maryland. Analysis by Schnei- 
der, No. 1279. P. R. C. 117. 
E. An earlier sample of D. Analysis by J. E. Whitfield, record 
No. 827. P. R. C. 117. 
Rocks B, C, D, E are described by Diller in Bull. 150, pp. 127, 133, 
300. 
Insoluble 
SiO, 
Ti0 2 
ALA- 
FeA 
FeO 
CaO 
MgO 
K 2 
Na 2 
H 2 
PA 
co 2 
Organic matter. 
33 
30. 68 
20.71 
.16 
46.66 
99.75 
9. 03 
.16 
2.25 
.85 
.52 
26. 84 
18.37 
.85 
none 
.98 
.03 
40. 33 
100. 21 
n. 0i 
5. 5; 
.40 
39. 26 
9.00 
is 
38.82 
.75 
99. 08 
29. 08 
20. 30 
44.26 
99.61 
.44 
1.22 
trace 
30. 73 
20.87 
1.22 
45. 85 
100. 33 
