IOWA ACADEMY OF SCIENCE 
166 
DATA FOR THE HYSTERESIS LOOP. 
I 
+ .055 
.063 
.0?2 
.085 
.095 
.m 
.143 
.170 
.204 
.266 
.353 
.472 
.620 
.718 
.621 
+ .621 
.472 
.350 
.264 
.204 
.171 
.143 
.124 
.108 
.097 
.083 
.062 
.055 
.000 
— .055 
.062 
.073 
.125 
.142 
.167 
.205 
.350 
.468 
.609 
.714 
d 
+3.58 
1.05 
2.00 
5.80 
5.70 
5.69 
4.68 
3.60 
1.95 
— .08 
1.30 
1.50 
1.55 
1.75 
1.10 
.55 
.50 
.45 
5.10 
-^.00 
1.60 
5.68 
10.33 
15.90 
17.30 
13.25 
10.70 
9.84 
7.58 
6.50 
5.. 50 
2.13 
Sum. d. 
V equals .570747. 
+ 3.58 Radius of ring:, 4. 75 cm. 
4.63 Coil, 590. turns. 
6.63 Test coil 75. turns. 
11.71 Earth inductor 1000 turns. 
16.01 Radius of E. In. 7.7 cm. 
22.01 Radius of teste. .717 cm. 
28.69 Mean d was 8.36 cm. 
34.49 
39.79 
45.07 H B u 
50.77 
56.46 3.553 
61.14 5.068 
64.74 17.61 
66.69 
I 
+65.84 —.608 
64.59 .467 
63.09 .348 
61.54 .261 
60.10 .203 
69.09 .168 
58.21 .143 
57.51 .124 
56.91 .110 
53.36 .096 
55.86 .086 
55.36 .071 
54.66 .034 
54.21 .054 
49.11 .000 
—40.11 +.054 
38.51 .063 
35.51 .1073 
29.11 .087 
23.43 .097 
13.10 .109 
— 2.80 .124 
20.10 .142 
33.36 .169 
44.05 .204 
53.89 .262 
61.47 .350 
67.97 . 466 
73.47 .606 
75.60 .709 
7230.5 2036.6 max. 
9453.0 1865.5 
13920.0 790.3 
d Sum. d. 
+ .80 —74.80 
1.30 73.50 
2.45 71.05 
1.40 69.65 
1.30 68.35 
1 .02 67.33 
.80 66.53 
.70 65.83 
.60 65.23 
.55 64.68 
.49 64.19 
.90 63.29 
.62 62.67 
.42 62.25 
5.20 57.05 
+9.42 —47.63 
1.70 45.93 
3.18 42.75 
6.50 36.25 
5.67 30.58 
10.40 20.18 
15.90 +41.28 
17.45 13.17 
13.00 26.17 
10.27 36.44 
9.30 45.74 
8.02 53.76 
6.10 59.86 
4.30 64.16 
2.20 66.38 
