688 PROCEEDINGS OF SECTION H. 
a direct tensile stress. Guillaume’s results are recorded in 
the following table :—- 
Coefficient of Elasticity 
Percentage of Nickel. in tons per square 
inch. ; 
5 13,720 
15 12,120 
19 11,260 
24°1 12,280 
24°1 11,040 
26°2 11,740 
27°9 11,500 
30°4 10,180 
31°4 9830 
34°6 9780 
35°2 9450 
37°2 9260 
39°4 9590 
44°3 10,340 
100 13,660 
a 
The following table gives the elastic limit, the load at 
fracture, and the elongations measured on lengths of 1 and 
2 inches, and represents a summary of the results obtained 
by the German Commission : — 
Siges Peseta Elongation per cent. 
Percentage | pyopor- ; measured on. 
ot tional limit | 4PParent Load at 
Nickel. of limit of Feanind: : at 
Elasticity. Elasticity. linch. | 2 inches. 
| 
0:05 4°25 9-90 21°52 34°3 Pfs) 
0°91 4°32 10°34 20°96 29°1 24°1 
2°05 6°45 12°80 23°52 26°1 22°7 
3°01 10:24 15.20 25°72 23°4 20°1 
3°98 10°56 17°08 25°72 20:1 7G) 
4°92 12°46 20 64 28° 24 12-9 10°8 
7°84 14°46 28°00 35°68 vb) bo . Ore 
15°60 10°20 28°00 25°88 0'9 0°6 
29°78 4°60 8°63 63 2°8 2:2 
59°60 3°80 7°93 24°00 37°9 36°1 
93°52 2°54 6°85 21°08 20°1 19:0 
98°56 2°28 5°80 19°34 18°8 17°1 
