PHYSICAL TESTS OF ROAD-BUILDING ROCK. 47 
Table 2. — Results of compression tests of rock, made prior to Jan. 1, 1916 — Continued. 
ILLINOIS— Continued. 
Serial 
No. 
Locality. 
County. 
Name. 
Crushing 
strength , 
pounds per 
square inch. 
7301 
19,700 
17,050 
16,700 
15,100 
18,640 
18,180 
19,510 
7302 
do-.. 
.do 
7871 
...do 
4421 
7422 
Osrle 
7423 
do 
do 
do 
5549 
INDIANA. 
5534 
Cass 
Limstone 
20,350 
17,960 
18,400 
20,000 
20, 510 
19,800 
12,250 
6,900 
6,450 
16,000 
14,470 
18,790 
4655 
4658 
St. Paul 
do 
Limestone 
4690 
do 
4659 
St. Paul... 
...do 
do... 
5088 
do 
do 
4197 
Mitchell 
Lawrence 
Argillaceous dolomite 
5027 
Bedford. . . 
do 
5029 
do 
...do... 
..do. 
3368 
do... 
5737 
Ripley 
do 
4657 
Wabash 
Wabash 
Dolomitic limestone 
IOWA. 
Cedar Rapids . 
La Grande — 
Linn 
Marshall . 
Dolomite limestone . 
do 
KENTUCKY. 
5552 
Caldwell 
Dolomitic limestone 
23,860 
25,720 
14,900 
13,400 
7688 
Cedar Bluff . . . 
do 
5921 
Carter 
5922 

MAINE. 
7438 
Hancock 
Biotite granite 
18,400 
20,020 
8745 
8768 
do 
do 
22,800 
20,930 
18,780 
8769' 
do 
....do... 
8781 
do 
do 
9865 
do 
do 
do 
17, 150 
9996 
....do 
do 
17,540 
9445 
. :.do.. 
21,220 
10366 
do 
do 
27,050 
20,600 
7439 
Frankford 
Waldo 
do 
MARYLAND. 
5611 
Mount Savage Junc- 
tion. 
34, 930 
4884 
17,580 
34,410 
5694 
Havre de Grace 
do 
Harford 
Gneissoid granite 
5695 
do 
20,090 
21, 670 
34,380 
5696 
.do 
.do . . 
5697 
do 
do 
do 
do.... 
...do 
5698 
35,210 
22,190 
5699 
do 
do 
