22 
BULLETIN 537, U. S. DEPARTMENT OF AGRICULTURE. 
Table II. — Results of compression tests of rock complete to Jan. 1, 1917 — Continued. 
VIRGINIA. 
Serial 
No. 
Locality. 
County. 
Name. 
Crushing 
strength, 
pounds 
per 
square 
inch. 
8S04 
Albert 
Bedford 
13,820 
25 885 
10344 
L vnchburg 
Campbell 
6796 
Dinwiddie 
Fauquier 
13,150 
2S 400 
4900A 
Broad Run 
4900B 
do 
do 
28,000 
13, 210 
45, 690 
13,550 
20, 300 
16 500 
5923 
5678 
Giles 
5924 
Goochland 
6615 
Koran Station 
5925 
Nelson 
5492 
Prince "William . . . 
Rockbridge 
Rockingham 
do 
Ferruginous sandstone 
17 780 
5920 
36,900 
21,450 
40,850 
17 600 
' 53S2 
Bluff "Water Station 
53S5 
do 
do. . . 
5375 
St. Paul 
Russell 
do 
7217 
Burkes Garden 
Tazewell , 
21,500 
WEST VIRGINIA. 
5365 
23,350 
21 300 
5917 
Renick 
Greenbrier 
do 
5918 
17 450 
5919 
do 
do 
7475 
Hampshire 
do. . 
34 400 
7476 
do 
15,050 
12, 400 
5 420 
6109 
Spring Hill 
9132 
do 
9133 
do 
do 
do 
5 720 
9134 
do 
do 
do 
6, 080 
22, 440 
5610 
Monongalia 
do 
Siliceous limestone 
5612 
do 
17 910 
5613 
do 
do 
Argillaceous limestone 
14,300 
29,840 
5614 
do 
do 
5615 
..do 
do 
19 650 
5616 
..do 
do 
Argillaceous limestone 
Feldspathic sandstone 
24,850 
11,910 
8447 
W r ood 
WISCONSIN. 
5523 
3448 
11129 
Peebles Fond du Lac. 
Amberg i Marinette 
Wauwatosa Milwaukee . . . 
Lannon Waukesha — 
Dolomite 
Biotite granite 
Argillaceous dolomite 
Dolomite 
32,600 
20, 000 
45,310 
23,020 
Exact locality not known. 
Table III. — Geographical distribution of rock samples tested to Jan. 1, 191', 
Alabama 31 
Arizona 3 
Arkansas 17 
California 101 
Colorado 28 
Connecticut 52 
Delaware • 30 
Florida 13 
Georgia 256 
Idaho 10 
Illinois 128 
Indiana 179 
Iowa 23 
Kansas 13 
Kentucky 46 
Louisiana 7 
Maine 86 
Maryland 121 
Massachusetts 192 
Michigan 95 
Minnesota 17 
Mississippi 13 
Missouri 39 
Montana 4 
Nebraska 12 
New Hampshire. . 27 
New Jersey 75 
New Mexico 1 
New York 148 
North Carolina ... 149 
Ohio 165 
Oklahoma 50 
Oregon 14 
Pennsylvania 610 
Rhode Island 41 
South Carolina ... 30 
South Dakota 15 
Tennessee 77 
Texas 63 
Utah 13 
Vermont 35 
Virginia 424 
Washington 213 
West Virginia 180 
Wisconsin 149 
Wyoming 3 
Canada 52 
Porto Rico 12 
Cuba 4 
Total 4,066 
By comparing the results of tests on a sample of rock with the 
limits as shown in the following table, a general idea of the types of 
road construction for which it is best suited may be obtained. 
