24 
BULLETIN 670, U. S. DEPARTMENT OF AGRICULTURE. 
Table II.— Results of compression tests of rock, made prior to Jan. 1, 1916. 
ARKANSAS. 
Serial 
No. 
Locality. 
County. 
Name. 
Crushing 
strength, 
pounds per 
square inch. 
6331 
Bald Knob 
White 
19, 860 
CONNECTICUT. 
ILLINOIS. 
INDIANA. 
IOWA. 
KENTUCKY. 
4422 
Embarras 
Coles 
17,300 
23,060 
16, 880 
15, 730 
19, 150 
25, 780 
28,400 
20, 610 
17, 710 
20,830 
11,660 
13,500 
25,850 
20,000 
19,800 
19, 700 
17 050 
5509 
Thornton 
Cook 
Dolomite 
6053 
8711 
do 
Hillside 
do 
do 
do 
4660 
Tunnel Hill 
Johnson 
7509 
Reevesville 
do 
7510 
do 
Kankakee 
do 
do 
4764 
Kankakee 
Dolomite 
5550 
6088 
do 
do 
do 
do 
do 
do 
do 
Argillaceous dolomite 
6165 
6865 
7298 
do 
do 
do 
do 
do 
7299 
7300 
7301 
7302 
do 
do 
do 
do 
do 
do 
do 
do 
do 
do 
do 
7871 
Lehigh 
do 
16 700 
4421 
Alton 
15,100 
18,640 
18, 180 
19,510 
7422 
Brookville 
Ogle 
7423 
5549 
do 
do 
Union 
.....do 
5534 
Limestone 
Dolomite 
Limestone 
Dolomitic limestone 
20,350 
17, 960 
4655 
Greensburg 
Decatur 
4658 
St. Paul... 
. .do 
18,400 
4690 
....do 
20,000 
4659 
5088 
4197 
St. Paul 
do 
Mitchell 
do 
do 
Lawrence 
do 
do 
Limestone 
Argillaceous dolomite 
20, 510 
19,800 
12,250 
5027 
Bedford 
Limestone 
do 
do 
do 
Dolnmitin limestone - ■ , 
6,900 
6,450 
16,000 
5029 
3368 
do 
do 
Putman 
Ripley 
Wabash 
5737 
Osgood 
14, 470 
4657 
18,790 
5525 
Linn. . 
Dolomite limestone 
19,950 
5526 
do 
14,850 
5552 
Princeton 
Caldwell 
do 
Carter 
.do.... 
Dolomitic limestone 
23,860 
7688 
5921 
Cedar Bluff 
Limestone 
Argillaceous limestone 
Limestone 
Siliceous limestone 
25, 720 
14,900 
5922 
13,400 
