ON THE MAGNETIC QUALITIES OF IRON. 
1011 
Ring VIIL — Second State, Soft Iron Wire of “ Hedgelrog ” Transformer 
after special anoealing. 
Cycle (1). 
Cycle (2), 
Cycle (3). 
Cycle (4). 
Cycle (5). 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
23-60 
16170 
15-25 
15490 
11-24 
14870 
8-05 
13840 
6-15 
12640 
9-63 
15700 
7-89 
15220 
6-74 
14660 ! 
4-08 
13510 
3-50 
12450 
5-77 
15450 
4-01 
14830 
3-70 
14460 ^ 
1-81 
13330 
1-27 
12120 
3-46 
15180 
2-04 
14570 
1-92 
14070 
0 
12720 
0 
11650 
212 
14970 
0 
13970 
0 
13460 
-1-50 
11470 
-1-54 
10540 
0 
14310 
! - 1-23 
13040 
- 1-54 
12150 
-2-16 
8480 
-2-35 
4890 
- 1-54 
13380 
j - 1-92 
11720 
- 2-31 
7650 
-2-73 
1780 
-2-89 
- 2110 
- 2-58 
5560 
j - 2-69 
3570 
- 2-69 
2800 i 
-3-27 
- 5160 
-3-46 
- 6950 
- 3-08 
- 1060 
- 3-27 
- 3700 
- 3-08 
- 2350 
-3-85 
- 8360 
-4-58 
-10410 
- 3-46 
- 4960 
- 3-85 
- 7880 
- 3-47 
- 5990 
-4-62 
-10330 
-6-15 
-12640 
- 3-91 
- 8020 
1 - 4-62 
-10340 
- 4-23 
- 9500 
-7-05 
-13190 
- 4-70 
-10410 
- 7-05 
-13170 
- 5-27 
-11490 
-8-05 
-13840 
- 5-77 
-12180 
-10-82 
-14690 
- 7-05 
-13280'^ 
- 7-74 
-13730 
-15-25 
-15490 
- 9-59 
-14400 ' 
-12-24 
-15180 
-11-24 
-14870 1 
-16-17 
-15640 
1 
-23-60 
-16170 
1 
1 
! 
Cycle (6). 
Cycle (7). 
Cycle (8). 
Cycle (9). 
Cycl 
B (10). 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
4-66 
10940 
3-63 
8640 ! 
2-50 
4000 
1-92 
1390 
1-41 
660 
2-19 
10610 
1-42 
8250 
0 
3140 
0 
730 
0 
260 
1-19 
10480 
0 
7780 
-1-39 
1480 
-1-06 
- 120 
-0-81 
- 70 
0 
10080 
-1-54 
6310 
-1-73 
30 
-1-35 
— 450 
-1-41 
-660 
-1-42 
9010 
-2-27 
1890 
-2-07 
-2101 
-1-92 
-1390 
-1-92 
7550 
-2-87 
—4660 
-2-50 
-4000 
-2-50 
1060 
-3-63 
-8640 
-2-89 
- 3570 
-3-66 
- 8750 
-4-27 
-10140 
— 4-66 
-10940 
Inspection of these curves (figs. 19 and 19a, Plate 40) will show that a result of the 
special annealing, which the ring received after it was coiled, was to make the stages of 
the cyclic process be much more sharply differentiated from one another than they were 
before. In other words, the curves are now exceedingly square-shouldered. The 
residual magnetism is high, and the rate of descent when reversal of magnetism is 
taking place is extremely rapid and uniform. dB/dH in the higher cycles is about 
13,000 at its maximum, and maintains a value little short of this, while B changes by 
as much as 20,000. 
G N 2 
