RESULTS OF PHYSICAL TESTS OF ROCK, 1916 AND 1917. 
27 
Table II. — Results of compression tests of rock, made prior to Jan. 1, 1916 — Continued. 
PENNSYLVANIA. 
Serial 
No. 
Locality. 
County. 
Name. 
Crushing 
strength, 
pounds per 
square inch. 
5602 
Bedford 
Impure limestone 
24, 150 
21,860 
5603 
do 
Birdsboro 
Juniata 
0) 
Hazard 
0) 
0) 
0)... 
do 
Siliceous limestone 
5632 
Berks 
39, 215 
15, 480 
20, 880 
9,000 
31 800 
8724 
Blair 
Argillaceous limestone 
8725 
do... 
do 
8625 
Blast-furnace slag 
7973 
797S 
do 
Mica schist 
23, 500 
23,900 
18,710 
7979 
. do... 
do 
Salona 
Clinton 
Argillaceous limestone 
7844 
(i) 
26,500 
8,510 
8306 
(i) 
do 
Limestone 
8427 
(') 
(i) 
...do .. 
do 
19 250 
S465 
do 
Siliceous dolomite 
9,640 
14,150 
8049 
(i) 
Elk 
5771 
Indian Creek Station. . 
Bidwell 
37, 740 
6097 
do 
Limestone 
13, 450 
9347 
. do... 
do 
26, 050 
22, 330 
5604 
Water Street 
Feldspathic sandstone 
Walford 
27, 500 
28,580 
26, 860 
6153 
Porter Township 
do 
do 
do 
do 
do 
Port Allegheny 
(i) 
6154 
do 
do 
6155 
do 
do 
18, 610 
22, 930 
6156 
do 
do 
6157 
do 
Limestone 
21,900 
6158 
do 
do 
14, 160 
9,6S0 
7980 
McKean 
Feldspathic sandstone : 
8022 
(i) 
12, 130 
14,000 
12,480 
8023 
(i) 
(i) 
do 
S024 
(i) 
(i) 
do 
3243 
McSpadden 
Sandstone 
26, 900 
5S30 
26, 340 
5605 
Blairsville intersection 
Westmoreland 
York 
Siliceous limestone 
32,560 
uii 
York 
Dolomitic marble 
27, 400 
RHODE ISLAND. 
8867 
Granite 11 740 
8868 
do 
do 
do 20,300 
8869 
do 
do 
do.. . 20 750 
SOUTH CAROLINA. 
8389 
Williamstown 
12, 990 
5568 
Rion 
Fan-field 
do 
29,180 
5586a 
do 
do 
do 
do 
25, 790 
55S6b 
do 
do... 
19, 240 
55S6c 
do 
do 
33, 880 
TENNESSEE. 
5597 
Quarry 
Straw'Plains 
do 
do 
Knoxville 
Carter 
Limestone 
22, 750 
5502 
do 
21,730 
5504 
do 
do 
28, 340 
5503 
do.:.:: 
Dolomite 
38, 070 
6533 
Marble 
17, 970 
VERMONT. 
East Wallingford. 
Barre 
Rutland 
Washington. 
Altered diabase . 
Granite 
16,S00 
19,560 
Exact locality not known. 
