TABLE A. 
Results of Experiments upon Gun Metals. 
Bronze. 
1 * 
Bronze steel from 
i ^ 
Steel 
from 
Krupp 
a 
Cast iron 
from a 
9-inch e:un 
Common 
bronze 
Cast in chill. 
1 f! 
1 
The 
from an 
“I 
u-pi • 
gun 
- 
i 
exterior 
o5 
w eigne 
8-pr. 
As cast 
Rolled 
• * 
' 
I 
1 
l 
1 
si 
square 
Elongation in hundred-thousands of the length 
8 
1 
1 
1 
H 
1 
1 
1 
1 
.2 
3 
§ 
1 
j 
M 
1 
Q 
1 
g 
•-§ 
M 
o 
I 
§ 
g 
<D 
•ji 
m 
c3 
« 
o 
3 
1 
§ 
§ 
a 
H 
Ph 
fH 
Ph 
H 
Ph 
H 
Ph 
H 
PH 
u 
Ph 
H 
S 
H 
Ph 
0-636 
2 
0 
10 
0 
8 
0 
2 
0 
4 
0 
1 
0 
i 3 
0 
3 
0 
1-272 
10 
0 
15 
0 
15 
0 
7 
0 
9 
0 
3 
c 
i 5 
0 
14 
0 
1-908 
15 
0 
25 
0 
25 
0 
10 
0 
11 
0 
7 
0 
i 8 
0 
25 
0 
2-544 
22 
0 
35 
0 
40 
0 
22 
0 
14 
0 
12 
€ 
i 14 
0 
35 
0 
3-180 
27 
0 
47 
1 
53 
2 
37 
0 
18 
0 
16 
€ 
i 20 
0 
55 
0 
3-816 
33 
0 
56 
4 
62 
4 
50 
0 
22 
0 
20 
C 
» 26 
0 
65 
0 
4-452 
38 
2 
66 
7 
70 
6 
60 
0 
24 
0 
25 
€ 
i 33 
0 
78 
0 
5.888 
47 
4 
77 
11 
79 
8 
73 
0 
27 
0 
30 
0 
i 40 
0 
86 
3 
5*724 
54 
5 
88 
20 
87 
10 
86 
0 
31 
0 
34 
0 
i 48 
0 
93 
9 
6-360 
61 
6 
101 
32 
100 
13 
96 
0 
35 
0 
39 
3 
54 
0 
103 
12 
6996 
68 
8 
110 
52 
108 
22 
107 
0 
37 
0 
44 
5 
60 
0 
112 
18 
7.632 
76 
10 
120 
96 
115 
47 
117 
0 
40 
2 
50 
7 
66 
0 
129 
26 
8-268 
84 
14 
130 
117 
128 
0 
42 
3 
55 
10 
73 
0 
135 
45 
8-904 
92 
19 
150 
327 
139 
0 
45 
4 
60 
14 
80 
0 
100 
125 
9-540 
101 
24 
170 
380 
149 
0 
48 
5 
65 
20 
88 
0 
10-176 
110 
30 
192 
441 
159 
0 
52 
6 
71 
31 
96 
0 
10-812 
120 
35 
170 
0 
57 
7 
76 
38 
102 
0 
11-448 
130 
50 
179 
2 
62 
8 
81 
48 
110 
0 
12-084 
142 
65 
... 
193 
5 
67 
8 
85 
120 
115 
2 
• • • 
12-720 
157 
81 
205 
8 
72 
9 
90 
252 
121 
3 
13-366 
215 
10 
77 
10 
98 
360 
127 
5 
13-992 
222 
12 
82 
12 
110 
586 
134 
7 
14-628 
239 
14 
88 
14 
142 
8 
15-264 
252 
18 
93 
16 
152 
10 
Tensile 
strength, 
tons per 
15! 
14! 
19 
1 i 
32 
29 
t 
30! 
31 
21 
sq. 
inch. 
Limit of 
tons, 
elasticity 
3*8 
2-6 
2-6 
11 
7 
5-8 
11! 
4-5 
per sq. in. 
ji 
s! 
5 Cl 
Elas¬ 
tic 
0-033 
0-035 
0-040 
0-170 
0-037 
0-034 
0-110 
0-076 
•g° 
£8 
a g 
At 
mnt. 
of 
0-40 
15-0 
40-0 
2-1 
22-0 
21-4 
. 
2-5 
40-0 
rupt. 
Section at 
point of 
0.96 
0-66 
0-54 
0-96 
0-62 
0-50 
0-96 
0-58 
rupture 
Hardness 
in mm.* 
10-2 
12-5 j 
12-5 
10-2 
10-5 
10-5 
10-5 
12-0 
* This hardness was measured by the indentation made in the specimen by a knife 
with given statical pressure, so that the greater the indentation given the softer the 
metal will prove. 
