1912-13.] Electrical Resistance and Magnetization of Nickel. 215 
Table D. — Values of Changes of Resistance per 10,000 due to Cyclic Longitudinal 
Fields ( h ) Superposed on various Values of Steady Transverse Magnetization. 
h-- 
10 
20 
30 
40 
50 
60 
0 
+ 9 
+ 27 
+ 43 
+ 54 
+ 61 
+ 66 
100 
+ 4 
+ 12 
+ 19 
+ 24 
+ 27 
+ 29 
200 
+ 0-3 
+ 0*8 
+ F3 
+ 1*6 
+ 1-8 
+ 2 
300 
-IT 
- 3-2 
- 5T 
- 6-4 
- 7-2 
- 7*8 
400 
-F7 
- 5-0 
- 8 
- 10T 
- 11-4 
-12-3 
500 
-L9 
- 5-8 
- 9-2 
-11-6 
- 13T 
-14T 
600 
-2-2 
- 6-5 
-10-4 
-13T 
-14-8 
- 16-0 
800 
-23 
- 6-9 
-11-0 
- 13-8 
-15-6 
- 16'9 
Table E. — Values of Changes of Resistance per 10,000 due to Cyclic Transverse 
Fields (t) superposed on Steady Longitudinal Magnetization. 
N. t 
h\ 
= 100 
200 
300 
400 
500 
600 
800 
0 
-41 
- 70 
- 81 
- 86 
- 88 
- 90 
- 91 
10 
-47 
. - 80 
- 93 
- 99 
-101 
- 104 
-105 
20 
-60 
-102 
-118 
-126 
-128 
-131 
-133 
30 
-71 
-121 
-140 
-149 
-152 
-155 
-157 
40 
-78 
-134 
-155 
- 164 
- 168 
-172 
-174 
50 
-83 
-142 
-164 
-175 
-179 
-183 
-185 
60 
, -87 
-148 
-171 
-182 
-186 
-190 
-192 
1 
The significance of these numbers is shown clearly in the representative 
graphs of the accompanying figure. The cyclic fields to which the changes 
of resistance are due are measured horizontally, and the corresponding 
changes of resistance vertically. The values of the steady magnetizing 
forces are indicated on the figure by numbers placed to the right of the 
curves. The curves marked H, which lie in the upper part of the diagram, 
correspond to the first of the two tables just given. They show the effect 
of the cyclic longitudinal field acting alone. For the lower values of the 
transverse field t , the resistance increases with application of the longi- 
tudinal field. But for a certain value of the transverse field, about 220, the 
change of resistance is zero. For higher values of steady transverse field 
the effect of the superposed cyclic longitudinal field is to decrease the 
resistance ; and this decrease of resistance increases numerically as the 
longitudinal field is taken stronger. 
The curves marked T, which are all on the negative or lower side of the 
horizontal axis, correspond to the second of the two tables. The striking 
feature is that the decrease of resistance is numerically increased when the 
transverse field is superposed on a steady longitudinal field, and that this 
