287 
THEOW-TESTING MACHINE FOR REVERSALS OF MEAN STRESS. 
Table III. — continued. 
Set B. 
Annealed Mild Steel. 
Oscillatory weight, 18'69 lbs. Diameter of Specimens, '247 inch to ’249 inch. 
Number. 
Revolutions per 
minute. 
Maximum 
stress. 
Minimum 
stress. 
Range of 
stress. 
Reversals for 
rupture. 
21 
2285 
13-86 
12-39 
26-25 
4,100 
22 
2250 
13-33 
11-91 
25-24 
6,200 
23 
2150 
12-36 
11-00 
23-36 
35,500 
24 
2170 
12-29 
10-96 
23-25 
58,900 
25 
2113 
11-60 
10-33 
21-93 
86,000 
26 
2032 
10-83 
9-62 
20 ■ 45 
124,700 
27 
1934 
9-88 
8-74 
18-62 
199,700 
28 
1860 
9-30 
7-20 
17-50 
350,000 
29 
1807 
8-68 
7 • 65 
16-33 
438,000 
30 
1790 
8-77 
7-71 
16-48 
528,000 
31 
1749 
8-08 
7-09 
15-17 
843,000 
32 
1715 
7-79 
6-82 
14-61 
1,840,000 
33 
1696 
7 -65 
6-70 
14-35 
5,076,000 
(Not broken.) 
Set C. 
Annealed Mild Steel. 
Oscillatory weight, 
24'9G lbs. Diameter of Specimens, '248 inch to '25 inch. 
34 
2150 
16-09 
14-32 
30-41 
0 
35 
2032 
14-34 
12-73 
27-07 
13,500 
36 
1962 
13-52 
11-97 
25 • 49 
30,900 
37 
, 1947 
13-14 
11-62 
24-76 
30,600* 
38 
1947 
13-14 
11-63 
24-77 
30,5 00 f 
39 
1903 
12-62 
11-13 
23-75 
55,250 
40 
1845 
11-83 
10-41 
22 • 24 
143,200 
41 
1758 
10-89 
9-56 
20 • 45 
348,000 
42 
1693 
10-10 
8-82 
18-92 
283,000 
43 
1682 
9-88 
8-64 
18-52 
783,200 
Set D. 
Annealed Mild Steel. 
Oscillatory weight, 31'23 lbs. Diameter of Specimens, '245 inch to '249 inch. 
44 
1920 
16-43 
14-52 
30 ■ 95 
4,400 
45 
1887 
15-74 
13-89 
29-63 
11,090 
46 
1831 
15-03 
13-25 
28-28 
14.300 
47 
1776 
14-31 
12-57 
26-88 
22,600 
48 
1729 
13-31 
11-66 
24-97 
72,700 
49 
1698 
12-72 
11-12 
23-84 
92,900 
50 
1642 
11-99 
10-45 
22-44 
149,400 
51 
1609 
11-63 
10-12 
21-75 
112,000 
52 
1589 
11-14 
9-66 
20-80 
400,300 
53 
1544 
10-69 
9-24 
19-93 
540,100 
* Keyed bush, of lower bearing free to turn, 
„ „ „ locked. 
