260 
ANALYSES OF ROCKS, U. S. GEOLOGICAL SUEVEY. [bull. 168. 
The following partial analyses by F. W. Clarke, record No. 738, all 
relate to Trenton limestones: 
A. Well No. 3, Bryan. Gas rock. 
B. McElree well, Kenton. Depth, 1,315 feet. 
C. Huntsville. Depth, 1,405 feet. 
D. Prospect. Depth, 1,650 feet. 
E. Findlay street well, Dayton. Depth, 975 feet. 
F. Xenia. Depth, 1,075 feet. 
G. New Madison. Depth, 1,150 feet. 
A. 
B. 
c. 
]). 
Insoluble 
9.22 
1.51 
49.00 
38. 59 
5.26 
1.10 
84.32 
8.43 
4.41 
3.15 
57.23 
33. 16 
26.12 
2.57 
66.02 
3.77 
Fe 2 3 , A1 2 3 
CaC0 3 
MgC0 3 
98.32 
99.11 
98.95 
98.58 
E. 
F. 
G. 
Insoluble 
12. 34 
.58 
82. 36 
1.67 
9.23 
.18 
86.54 
2.99 
11.11 
3.60 
64.91 
17.98 
Fe 9 0,, ALOo 
CaC0 3 
MgC0 3 
96.95 
98.94 
97.60 
In C and G there is ferrous carbonate. 
