PROPERTIES OF IRON AT A HIGH TEMPERATURE. 
453 
Table 18. 
Magnetising 
force. 
Galvanometer 
kick. 
Eesistance in 
circuit. 
Induction per 
sq. cm. 
Resistance of 
coil. 
Temperature. 
° C. 
3-01 
728 
0075 
229 
13-44 
847 
0-075 
155 
13-44 
573 
0-3 
89 
103-44 
2528 
0-075 
154 
13-43 
570 
0-3 
96 
103-43 
2726 
1-2 
132 
103-43 
3749 
7-3 
156 
103-43 
4430 
37-2 
I8I 
103-43 
5155 
3-0 
725 
The sample was again heated until it became non-magnetic. A magnetising force 
of 0'075 was applied by a current in the primary during heating, and was taken off 
entirely by breaking the primary circuit when the sample was non-magnetic. The 
sample was allowed to cool to the ordinary temperature of the room, 12° C., and the 
following series of observations was made, the first reversal being from the direction 
of the force of 0‘075 which had been applied when the ring was heated. 
Table 19. 
Magnei ising 
Galvanometer 
Resistance in 
Induction per 
force. 
kick. 
circuit. 
sq. cm. 
0-075 
120 
1-244 
41 
87 
99 
30 
0-15 
249 
85 
210 
72 
0-3 
62 
11-244 
193 
58 
99 
179 
0-6 V 
178 
99 
550 
154 
476 
1-2 
59 
55 
101-244 
99 
■ 
1,590 
2-2 
227 
223 
99 
■ 
6,300 
4-0 
7-3 
357 
363 
99 
201-24 
99 
■ 
> 10,080 
226 
228 
> 12,553 
12-1 
252 
' 
• 13,991 
254 
18-8 
268 
270 
9 9 
99 
■ 
■ 14,876 
25-9 
99 
275 
278 
9 9 
99 
■ 
. 15,318 
42-4 
i 99 
1 
1 
293 
291 
99 
99 
■ 
- 16,148 
