•284 
PROFESSOR OSBORNE REYNOLDS AND MR. J. H. SMITH ON A 
having been subjected to about half the number of reversals required to break them. 
The speed of the machine and the suspended load (24'96 lbs.) were kejM the same in 
all cases. The results of these tests are given in Table II. 
O 
Table II.— B 
Oscillatory weight, 24 - 96. Diameter of Specimens, ’265 inch to '269 inch. 
Unannealed. 
Number. 
Revolu¬ 
tions per 
minute. 
Maximum 
stress. 
Minimum 
stress. 
Range of 
stress. 
Reversals. 
Total 
revex-sals. 
1 
1948 
11-56 
10-23 
21-79 
114,000 
114,000 
9 
1949 
11-35 
10-06 
21-41 
122,000 
122,000 
Q 
O 
1947 
11-53 
10-21 
21-74 
124,000 
124,000 
4 
1940 
11-54 
10-22 
21-76 
47,500 
47,500 
5 
1947 
11-69 
10-37 
22-06 
58,400 
— 
(After 3 days) 
1933 
11-51 
10-21 
21-72 
53,800 
112,200 
6 
1935 
11-37 
10-08 
21-45 
58,100 
— 
(After 5 days) 
1938 
11-41 
10-11 
21-52 
60,200 
118,300 
7 
1938 
11-38 
10-09 
21-47 
58,200 
— 
(After 5 days) 
1942 
11-53 
10-02 
21-55 
80,600 
138,800 
8 
1937 
11-49 
10-17 
21-66 
58,200 
— 
(After 11 days) 
1932 
11-43 
10-11 
21-54 
58,500 
116,700 
9 
1940 
11-39 
10-09 
21-48 
58,200 
— 
(After 11 days) 
1936 
11-37 
10-07 
21-44 
7,500 
65,700 
10 
1944 
11-58 
10-26 
21-84 
58,300 
— 
(After 4 months) 
1942 
11-56 
10-23 
21-79 
30,800 
89,100 
11 
1944 
11-57 
10-24 
21-81 
58,300 
— 
(After 4 months) 
1950 
11-63 
10-31 
21-94 
32,100 
90,400 
Annealed. 
Diameter of 
Specimens, 
‘25 inch. 
12 
1947 
13-14 
11-62 
24-76 
30,600 
30,600* 
13 
1947 
13-14 
11-63 
24-77 
30,500 
30,500* 
14 
1947 
13-09 
11 ■ 58 
24-67 
15,600 
(After 4 months) 
1938 
12-98 
11-46 
24-44 
20,250 
35,850 
15 
1947 
13-87 
11-21 
25-08 
15,600 
— 
(After 4 months) 
1936 
16-40 
13-35 
29-75 
12,600 
28,200 
No. 15 had extended during the first part of the test, and the diameter had changed 
from 
•2487 to -227 
1. 
In these experiments, two sets of specimens were prepared all from the same bar. 
The material was the same as that employed in the tests recorded in Table III. The 
first set consisted of 11 specimens, which were tested without annealing. The 
length of each was '63 inch, and their diameters varied from '265 to ‘269 inch. 
Specimens 1, 2, 3, and 4 were broken without stopping the machine. Specimens 
* These two tests are also included in Table III., Set C, Nos. 37, 38. 
