CLAKKE.l 
CAEBONATE EOCKS. 
NEW YORK. 
303 
A. Dolomite-marble, New York Quarry Company, Tuckahoe, West- 
chester County. Analysis by W. F. Hillebrand, record No. 746. 
B. Hydraulic-cement rock, Akron. Analysis by George Steiger, 
record No. 1655. Described by Diller in Bull. 150. 
Insoluble 
SiO, 
Ti0 2 . 
A1 2 3 
Fe 2 3 
FeO . 
1.33 
.21 
CaO 
MgO 
K 2 
Na 2 
H 2 
PA --- 
co 2 
Organic matter 
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 
