PHYSICAL TESTS OF ROAD-BUILDING ROCK. 49 
Table 2.— Results of compression tests of rock, made prior to Jan. 1, 1916 — Continued. 
NORTH CAROLINA— Continued. 
Serial 
No. 
Locality. 
County. 
Name. 
Crushing 
strength, 
pounds per 
square inch. 
9038 
Granite 
16, 070 
5956 
23,220 
5496 
Granite 
33,750 
6071 
16, 100 
5497 
Granite 
18,400 
7433 
do 
do 
15,200 
8901 
do 
do 
do 
5,100 
9048 
do 
do . 
do 
16,440 
8419 
3807 
Granita (near) 
Wake 
14, 160 
18, 210 
3808 
do 
do 
do 
18, 560 
5374 
(*) 
12,900 
OHIO. 
4694 
Clark 
8,690 
4695 
...do . 
18, 960 
31, 790 
9282 
Granite 
92S3 
. ..do .... 
do 
do 
27,900 
9284 
do 
...do .... 
do 
24, 790 
26,990 
9285 
. .do . 
....do 
do 
9459 
do 
Sandusky 
do 
Castalia 
do 
Marble Cliff 
do 
Columbus 
Patterson 
Dunkirk 
Hillsboro 
Clarksfield 
Big Springs 
Vulcan 
Holland 
Toledo, 10 miles west of. 
White Rock 
Bloomville 
Middleport 
do 
do 
24,900 
4378 
Erie 
19,400 
21, 850 
5554 
do 
5753 
...do . 
18,530 
20, 810 
6055 
...do .. 
5505 
do 
16, 750 
5506 
do 
do 
12, 350 
5630 
....do 
21, 800 
11, 360 
4693 
Hardin 
Dolomite 
5553 
do 
do 
26,200 
4707 
15, 590 
9,490 
16, 380 
25, 4S0 
8347 
Huron 
4656 
6054 
6057 
do 
....do 
Argillaceous limestone 
19, 430 
11,600 
8402 
6052 
do 
16, 620 
20, 250 
25, 200 
OKLAHOMA. 
3388 Granite. 
Greer Granite 
PENNSYLVANIA. 
5602 
Hvndman 
Bedford. . . 
24,150 
21, 860 
5603 
do 
do 
Siliceous limest one 
5632 
Birdsboro 
Berks 
39, 215 
15, 4S0 
20, 880 
9,000 
31,800 
23,500 
23,900 
18,710 
26,500 
8,510 
19, 250 
8724 
Juniata 
Blair 
8725 
(i) 
do 
do 
8625 
Hazard 
Carbon 
7973 
(i) 
Chester 
Pyroxene quartzite 
7978 
(i) 
do 
7979 
(') 
do 
do 
5578 
Clinton 
7844 
0) 
Dauphin 
8306 
(i) 
do 
8427 
(i) 
do 
do 
8465 
(i) 
do 
9,640 
14, 150 
37,740 
13,450 
8049 
(i) 
Elk 
5771 
Indian Creek Station. . 
Bidwell 
Fayette 
6097 
.../.do 
Limestone 
1 Exact locality not known. 
