478 
ME. W. H. BAELOW 0 ^ THE EESISTAA^CE OE ELEXTEE 
Experiments on the Transverse Strength of Cast Iron, made by the Officers of the 
Ordnance Department of the United States Government. 
Square bars. Length of bearing 20 inches. 
Tensile resistance 
Description of iron. 
Number of 
experiment. 
Hours in 
fusion. 
Breadth. 
Depth. 
Breaking 
■weight. 
calculated from the 
formula, including ■ 
resistance of flexure. 
in. 
in. 
lbs. 
lbs. 
Franklin iron. 
r 
9 
u 
2-025 
2-058 
12,712 
18,920 
Second fusion... c 
10 
11 
2 
2f 
2-000 
1-994 
2-054 
2-008 
12,712 
13,950 
19,233 
22,149 
L 
12 
2|- 
1-989 
2-013 
11,700 
18,531 
Third fusion ... 
79 
^ 4 . 
1-975 
1-999 
14,569 
23,566 
80 
2^ 
4 
1-977 
2-008 
13,387 
21,440 
21 
0 
2-025 
1-980 
12,987 
20,882 
22 
0 
2-020 
1-990 
13,365 
21,330 
23 
1 
2-030 
1-990 
15,363 
24,396 
Third fusion ...< 
24 
1 
2-030 
1-990 
14,616 
23,211 i 
25 
2 
2-020 
2-050 
13,788 
20,735 
26 
2 
2-050 
2-070 
14,850 
21,582 
27 
3 
2-025 
2-060 
16,056 
23,852 
28 
3 
2-035 
2-020 
16,722 
25,708 
r 
29 
1 
2 
1-978 
2-003 
12,994 
20,904 
Third fusion ...< 
30 
31 
H 
3 
1-930 
1-977 
2-003 
2-028 
15,300 
15,862 
25,226 
24,904 
32 
2-010 
2-008 
16,172 
25,473 
Eound bars. Length of bearing 20 inches. 
Deseription of iron. 
Number of 
experiment. 
Hours in 
fusion. 
Diameter. 
Breaking 
■weight. 
Tensde resistance 
computed from the 
formula, including 
resistance of flexure. 
in. 
lbs. 
lbs. 
Franklin iron... 
37 
1 
1-975 
7,920 
20,711 
Second fusion... << 
38 
39 
2 
3 
1-950 
1-953 
9,270 
9,481 
25,188 
25,644 
40 
4 
1-975 
7,920 
20,711 
r 
81 
1 
2 
2-415 
16,425 
23,493 
82 
H 
2-420 
18,141 
25,788 
Third fusion ...<^ 
83 
24 
2-420 
20,419 
29,093 
84 
2f 
2-420 
19,997 
28,425 
85 
H 
2-420 
18,225 
25,907 
" 
33 
1 
2 
1-960 
10,437 
27,927 
Third fusion ...< 
34 
35 
14 
3 
1- 970 
2- 000 
8,665 
11,112 
22,833 
27,984 
L 
36 
H 
1-960 
10,606 
28,378 
The tensile strength of the same metal, as ascertained by direct experiment, is thus 
stated at page 44 of the Keport : — 
