669 
1907-8.] Young’s Modulus under an Electric Current. 
Platinum. 
Length 
© 
Area of cross-section 
Elongation weight 
Total load on wire 
Load per sq. mm. 
= 62T2 cms. 
= ’0007548 sq. cms. 
= 300 grams. 
© 
= 800 „ 
= 10’56 kilos. 
Table I.— First Cycle. 
No. 
Temp. 
Elongation for 
300 grains. 
No. of 
Observations. 
M. 
1 
20°0 C. 
'01788 cm. 
8 
13-55 x 10 11 
2 
22-8 
•01918 
8 
12-63 
3 
30’0 
•01897 
8 
12-74 
4 
45’1 
•01829 
6 
13-25 
5 
59’3 
•01786 
6 
13-57 
6 
68’9 
•01749 
8 
13-85 
7 
796 
•01709 
8 
14T8 
8 
88’5 
•01671 
9 
14*50 
9 
94’2 
•01642 
10 
14-76 
10 
101-5 
•01601 
8 
1544 
11 
107’7 
•01573 
8 
15-41 
12 
114-0 
•01583 
8 
15-31 
13 
1238 
•01626 
8 
14-90 
14 
135’6 
•01704 
8 
14-22 
15 
145-4 
•01802 
8 
13-45 
16 
155-2 
•01918 
8 
12-63 
17 
150-0 
•01948 
8 
12*44 
18 
142-6 
•01943 
8 
12-47 
19 
131-1 
•01920 
8 
12-62 
20 
120-7 
•01858 
8 
13-04 
21 
112-3 
•01759 
6 
13-79 
22 
108-2 
01682 
9 
14-41 
23 
103-5 
•01602 
7 
15-13 
24 
97-6 
•01505 
8 
16T0 
25 
89-9 
•01399 
8 
17*32 
26 
85-1 
•01376 
8 
17-61 
27 
82-6 
•01386 
8 
17-48 
28 
78-2 
•01446 
8 
16-75 
29 
74-9 
•01497 
7 
16T9 
30 
68-8 
•01563 
6 
15-50 
31 
55-7 
•01656 
8 
14-63 
32 
44-2 
•01731 
9 
14-00 
33 
32-3 
•01780 
8 
13-61 
34 
26-5 
•01796 
8 
13-49 
35 
23-2 
•01802 
8 
13-45 
36 
20-3 
•01669 
8 
14-52 
