290 
PEOFESSOE OSBORNE REYNOLDS AND ME. J. H. SMITH ON A 
but there does not appear to be any definite connection between these changes of 
dimensions and the range of stress or speed, as far as the author has observed. In 
only one test, namely, No. 15, Table II., was a change of diameter observed on 
stopping the machine before rupture. The author is led to believe that the change 
in dimensions occurs, if at all, just before breaking. In only one case had flaws been 
observed on stopping the machine before the breaking-point was reached, namely, 
No. 15, Table IV. It showed most peculiar flaws at both ends. 
Table IV.—Annealed Lowmoor Iron. 
Set A. 
Oscillatory weight, 12’42 lbs. Diameter of Specimens, '245 inch to '249 inch. 
Number. 
Devolutions per 
minute. 
Maximum 
stress. 
Minimum 
stress. 
Range of 
stress. 
Eeversals for 
rupture. 
1 
2380 
10-15 
9-08 
19-23 
33,350 
2 
2308 
9-33 
8-35 
17-68 
49,200 
3 
2298 
9 • 53 
8-51 
18-04 
36,200 
4 
2217 
8-82 
7-86 
16-68 
43,250 
5 
2122 
7-99 
7-10 
15-09 
252,500 
6 
2038 
7-28 
6 • 47 
13-75 
89,700 
I 
2034 
7-31 
6-50 
13-81 
192,300 
8 
19G9 
6-73 
5-97 
12-70 
399,600 
9 
1893 
6-23 
5-50 
11-73 
111,600 
10 
1890 
6-21 
5 • 48 
11-69 
1,236,000 
Set B. 
Oscillatory weight, 24'9f> lbs. Diameter of Specimens, '245 inch to '248 inch. 
11 
2217 
13-03 
11-53 
24-56 
16,270 
12 
2131 
12-19 
10-74 
22-93 
43,800 
13 
2066 
11-54 
10-17 
21-71 
63,000 
14 
2019 
10-77 
9-45 
20 • 22 
85,800 
15 
1975 
10-50 
9-20 
19-71 
413,000 
1G 
1917 
9-76 
8-52 
18-24 
342,000 
Set C. 
Oscillatory weight, 
31'23 lbs. Diameter of Specimens, '248 inch to -25 inch. 
17 
191G 
12-87 
11-25 
24-12 
62,700 
18 
1836 
11-77 
10-25 
22-02 
80,200 
19 
1701 
10-28 
8-88 
19-16 
243,800 
20 
1630 
8 • 48 
8-14 
17-62 
760,100 
Set D. 
Oscillatory weight, 4377 lbs. Diameter of Specimens, '248 inch to '249 inch. 
21 
1486 
13-81 
11-90 
25-71 
54,000 
22 
1397 
12-15 
10-37 
22-52 
100,400 
23 
1367 
11-69 
9-96 
21-65 
299,500 
