1910-11.] Young’s Modulus under an Electric Current. 
237 
Copper. 
Length 
Area of cross-section 
Elongation weight 
Total load on wire 
Load per sq. mm. 
Table 
= 98T5 cms. 
= 0*0006026 sq. cm. 
= 300 grams. 
= 1 kilo. 
= 16*6 kilos. 
V. 
No. 
Temp. 
Elongation for 
300 grams. 
No. of 
Observations. 
M. 
1 
16°9 0. 
*04320 cm. 
7 
llTOx 10 11 
2 
20-2 
*04192 
8 
11*44 
3 
25-4 
*04064 
8 
11 "80 
4 
29’8 
*03995 
9 
12-01 
5 
33-0 
*03963 
9 
12-10 
6 
35*3 
*03960 
8 
12-11 
7 
40-5 
*03990 
9 
12-02 
8 
48-7 
*04039 
7 
11-87 
9 
55*3 
*04092 
7 
11-72 
10 
61*6 
*04120 
6 
11-64 
11 
70T 
•04174 
9 
11-49 
12 
79-8 
•04218 
9 
11-37 
13 
91*2 
•04263 
8 
11-25 
14 
101*5 
•04287 
8 
11-19 
15 
114*6 
•04313 
9 
11-12 
16 
124*7 
*04337 
7 
11-06 
17 
117*4 
•04305 
7 
11-14 
18 
108*8 
•04278 
6 
11-21 
19 
97*9 
•04248 
9 
11-29 
20 
85*4 
•04166 
8 
11-51 
21 
76*3 
•04126 
9 
11-62 
22 
64*0 
•04064 
9 
11-80 
23 
59*8 
•04046 
10 
11-85 
24 
52*1 
•04039 
10 
11-87 
25 
45*2 
•04067 
7 
11-79 
26 
38*6 
•04105 
6 
11-68 
27 
34*5 
•04145 
8 
11-57 
28 
27*7 
•04188 
8 
11-45 
29 
23*4 
•04240 
8 
11*31 
30 
16*9 
•04320 
8 
11-10 
Total load = 1*2 kilos. 
= 19*9 kilos, per sq. mm. 
Table Y. 
No. 
Temp. | 
Elongation for 
300 grams. 
No. of 
Observations. 
M. 
1 
17°2 C. 
•04317 cm. 
6 
1111 xlO 11 
2 
19-6 
•04260 
8 
1T26 
3 
24-3 
•04203 
8 
11-41 
4 
28-0 
•04174 
6 
11-49 
