AND STRAIN ON THE ACTION OF PHYSICAL FORCES. 
21 
Table I. (continued)—Number of complete turns of permanent torsion produced 
before the application of the load — n. Temporary alteration of torsion produced 
by the load in terms of divisions of the scale =a; + signifies further twist, 
— untwist on loading. 
7c. 
Hard piano steel, diameter = '082 centim. 
l. 
Copper, diameter = ' 
09C centim. 
n. 
k. 
a . 
n. 
1c. 
a. 
5 mins. 
5 mins. 
0 
0 
5 
4 
171- 
10 
6 
103 + 
8 
193- 
20 
6 
153 + 
12 
198- 
40 
6 
151 + 
12 lirs. 
2 hrs. 
12 
9 
5 
4 
162- 
40 
6 
112 + 
8 
192- 
12 
192- 
2 hrs. 
12 
Same 
wire partially annealed 
40 
6 
53 + 
2 hrs. 
10 
100 + 
12 
i hr. 
10 
4 
44-5- 
13 
8 
52'0- 
12 
47-0- 
40 
6 
50-5 + 
10 
95-0 + 
Same wire completely annealed 
i hr. 
5 mins. 
14 
0 
40 
6 
44-5 + 
15 
4 
29 + 
10 
88-0 + 
8 
100 + 
Total permanent increase of length 
h hr. 
produced by the loading = 10 per cent. 
8 
15 
4 
34 + 
8 
58 + 
