665 
1907-8.] Young’s Modulus under an Electric Current. 
Copper. 
Length = 97*83 cms. 
Area of cross-section = *0006026 sq. cm. 
Elongation weight = 300 grams. 
Total load on wire — 800 „ 
Load per sq. mm. = 12*8 kilos. 
Table I. 
No. 
Temp. 
Elongation for 
300 grams. 
No. of 
Observations. 
M. 
1 
15-2 C. 
•04264 cm. 
8 
1T21 xlO 11 
2 
16-3 
•04306 
8 
11T0 
3 
17*5 
•04230 
8 
11-30 
4 
20-0 
•04082 
8 
11-71 
5 
24'8 
•03934 
8 
12T5 
6 
30-6 
•03830 
8 
12-48 
7 
367 
•03766 
8 
12-69 
8 
41-4 
•03734 
8 
12-80 
9 
44-8 
•03731 
8 
12-81 
10 
47*5 
•03746 
8 
12-76 
11 
52-0 
•03796 
7 
12-59 
12 
60*1 
•03925 
7 
12T8 
13 
65*3 
•04020 
7 
1T89 
14 
70-9 
•04086 
6 
11-70 
15 
77*7 
•04138 
8 
11-55 
16 
84*2 
•04178 
8 
11-44 
17 
956 
•04215 
8 
11-34 
18 
106T 
•04238 
8 
11-28 
19 
115-5 
•04267 
8 
11-22 
20 
122-3 
•04277 
9 
11T8 
21 
116-2 
•04225 
8 
11-29 
22 
110-0 
•04193 
8 
1T40 
23 
99-8 
•04103 
8 
11-65 
24 
9T0 
•04026 
8 
1T87 
25 
82-3 
•03944 
8 
12T2 
26 
74-1 
•03858 
8 
12*39 
27 
67*4 
•03825 
8 
12-50 
28 
62-5 
•03812 
7 
12-54 
29 
56-7 
•03809 
7 
12-55 
30 
51-5 
•03822 
8 
12-51 
31 
44-2 
•03861 
9 
12-38 
32 
34-9 
•03955 
7 
12-09 
33 
27-6 
•04051 
8 
11-80 
34 
22-8 
•04150 
8 
11-52 
35 
20-0 
•04212 
8 
11-35 
36 
16-3 
•04306 
8 
11-10 
37 
15-8 
•04249 
6 
11-25 
