661 
1907-8.] Young’s Modulus under an Electric Current. 
is greater than that for heating by the current when the load is 22 kilos, 
and if these lines were produced they would intersect at about 240° C. In 
this case, also, the graph for the electric heating with a load of • 8 kilo 
approaches the other two graphs, and it is again possible that the three 
may ultimately all coincide. 
Steel Wire. 
Length 
Area of cross-section 
Elongation weight 
Total load on wire 
Load per sq. mm. 
= 98'45 cms. 
= ‘0004714 sq. cm. 
= 500 grams. 
- 800 „ 
'= 16'96 kilos. 
Table I. — First Cycle. 
No. 
Temp. 
Elongation for 
500 grams. 
No. of 
Observations. 
| 
M. 
1 
12°0 C. 
*04745 cm. 
8 
2T60 x 10 11 
2 
14T 
•04839 
8 
21T8 
3 
20-3 
•04803 
8 
21-34 
4 
28-4 
•04776 
8 
21*46 
5 
33-5 
•04760 
8 
2T53 
6 
40-0 
•04747 
8 
2T59 
7 
43-2 
*04745 
10 
21-60 
8 
48-8 
•04749 
8 
21-58 
9 
55-4 
•04760 
8 
21-53 
10 
64-7 
•04778 
6 
21-45 
11 
76T 
•04798 
8 
21-36 
12 
89-5 
•04818 
8 
21-27 
13 
100-9 
•04830 
7 
2T22 
14 
109-2 
•04837 
8 
21T9 
15 
106-0 
•04830 
7 
21-22 
16 
97-3 
•04800 
8 
2T35 
17 
90-4 
•04773 
6 
21-47 
18 
80-6 
•04740 
8 
21-62 
19 
7T7 
•04716 
10 
21-75 
20 
64-0 
•04701 
8 
21-80 
21 
62-1 
•04699 
9 
21*81 
22 
60-2 
•04702 
8 
21*79 
23 
55 4 
•04710 
8 
21-76 
24 
45-7 
•04742 
8 
21-61 
25 
38-9 
•04760 
8 
21-48 
26 
30-5 
•04818 
8 
21*27 
27 
24-8 
•04848 
6 
21T5 
28 
20-0 
•04867 
7 
2T06 
29 
14-0 
•04880 
8 
20-98 
30 
12-5 
•04740 
8 
21-62 
