ELASTIC CONSTANTS OF ROCKS. 
43 
Granite, Quincy, Massachusetts, United States. 
First specimen. 
Second specimen. 
No. ... 
a 
a 
C 
C 
d 
d 
b 
b 
Size . . 
.989X1.071 
1.063 X .955 
1.011 X .954 
.945 X .892 
Area.. 
1.06 
1.06 
1.01 
1.01 
.965 
.965 
.843 
.843 
E 
6,560,000 
6,840,000 
6,630,000 
6,630,000 
6,820,000 
7,000,000 
8,135,000 
8,360,000 
tr 
.185 
.1925 
.21 
.21 
.244 
.25 
.1915 
.204 
D 
3,470,000 
3,710,000 
3,810,000 
3,810,000 
4,440,000 
4,666,000 
4,390,000 
4,720,000 
C 
2,765,000 
2,865,000 
2,760,000 
2,760,000 
2,740,000 
2,800,000 
3,410,000 
3,480,000 
LONGITUDINAL COMPRESSION MULTIPLY READINGS BY 4 FOR MILLIONTHS. 
Load (in 
pounds). 
Side 
U. 
Side 
P. 
Side 
U. 
Side 
P. 
Side 
U. 
Side 
P. 
Side 
U. 
Side 
P. 
l,OOO 
2,OOO 
3,000 
4,000 
5,000 
6,000 
7,000 
8,000 
9,000 
8,000 
7,000 
6,000 
5,ooo 
4,000 
3,000 
2,000 
1,000 
O 
60 
no 
1 60 
200 
240 
280 
3 20 
360 
3 2I 
282 
245 
203 
162 
112 
63 
4 

50 
95 
145 
185 
230 
270 
310 
345 
3i5 
280 
235 
195 
140 
90 
40 
5 

56 
109 
161 
206 
259 
291 
334 
374 
325 
290 
260 
2IO 
165 
no 
60 
5 

374 


45 
IOO 
150 
198 
246 
290 
330 
380 
340 
298 
250 
210 
165 
"5 
60 
5 
O 
370 
5 

365 
3 

50 
IOO 
142 
193 
225 
260 
310 
355 
3M 
274 
235 
190 
145 
IOO 
50 
5 
LATERAL EXTENSION MILLIONTHS. 
First specimen. 
Second specimen. 
No 
a 
c 
d 
6 
b 
Size 
.989 
.955 
1.011 
.892 
.945 
1,000. 
2,000. 
3,000. 


25 
55 
90 
H5 
145 
175 
200 
240 
205 
1 80 
155 
120 
95 
60 
30 
5 

35 
70 
no 
150 
190 
230 
270 
300 
275 
240 
195 
155 
1 20 
75 
40 
10 
O 
24 
51 
76 
IOI 
125 
157 
174 
206 
175 
153 
127 
103 
77 
50 
25 
2 
O 
2O 
45 
70 
IOO 
125 
155 
1 86 
219 
192 
164 
134 
105 
88 
50 
25 
3 
4,000 
5,000. 
6,000. 
7,000. 
8,000. 
9,000 
210 
8,000 
7,000 
6,000. 
5.000. 
4,000. 
3,000 
2,000 
I,OOO. 
5 
