ON THE MAGNETIC QUALITIES OF IRON. 
1009 
Ring VIIL —Soft Iron Wire of “ Hedgehog ” Transformer. First State. 
Cycl 
3(1). 
Cycle (2). 
Cycle (3). 
Cycle (4). 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
22-23 
15600 
15-04 
14200 
11-33 
13020 
8-62 
11690 
9-58 
14400 
7-89 
13410 
6-72 
12550 
4-60 
11030 
4-45 
I3I40 
4-05 
12530 
3-69 
11820 
1-84 
10290 
2-16 
I2I30 
2-00 
11840 
1-92 
11160 
0-75 
9830 
1-06 
11540 
0 
10140 
0-98 
10630 
0 
9300 
0 
10750 
- 1-21 
9080 
0 
9960 
- 1-53 
7500 
- 1-38 
9150 
- 1-96 
7550 
- 1-45 
8300 
- 1-96 
6380 
- 2-16 
7020 
- 2-77 
1380 
- 1-96 
7110 
- 2-37 
3590 
- 2-44 
4830 
- 3-14 
- 2080 
- 2-40 
4190 
- 2-75 
- .3301 
- 2-79 
1450 
- 3-53 
- 4280 
- 2-75 
800 
- 3-14 
- 3130 
- 3-02 
- 550 
- 4-34 
- 6790 
- 3-14 
- 2520 
- 3-73 
- 5980 
- 3-34 
- 2950 
- 4-71 
- 8120 
- 3-54 
- 4780 
- 4-32 
- 7430 
- 3-93 
- 5530 
- 5-89 
- 9520 
- 4-15 
- 6770 
- 5-07 
- 8630 
- 4-71 
- 7520 
- 6-88 
-10580 
- 4-71 
- 8040 
- 5-91 
- 96.30 
- 5-89 
- 9430 
- 8-24 
-11580 
- 5-70 
- 9430 
- 7-66 
-11030 
- 7-85 
-11310 
-12-29 
-13310 
- 6-68 
-10430 
- 8-62 
-11690 
- 9-81 
-12500 
-15-04 
-14200 
- 9-69 
-12350 
-16-72 
-14710 
-11-33 
-13020 
— 22-23 
-15600 
Cycle (5). 
Cycle (6). 
Cycle (7). 
Cycle (8). 
Cycle (9). 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
H. 
B. 
6-56 
10160 
5-03 
8490 
3-65 
5950 
2-51 
2490 
1-73 
900 
3-65 
9630 
3-14 
8170 
2-56 
5740 
1-42 
2150 
0-82 
630 
1-57 
9030 
1-57 
7700 
1-69 
5470 
0 
1490 
0 
300 
0-90 
8760 
1 0 
6910 
0 
4680 
1-10 
430 
0-66 
- .30 
0 
8230 
! -1-10 
5780 
-1-10 
3480 
1-77 
- 690 
1-18 
— 360 
-0-98 
7240 
! -1-57 
4980 
-1-77 
1960 
2-12 
- 1020 
1-73 
-900 
-1-.38 
6710 
: -2-16 
2320 
-2-36 
- 1630 
2-51 
— 2490 
-1-96 
5120 
- -2-75 
- 2660 
-2-87 
- 4150 
-2-36 
2320 
-3-10 
— 4650 
-3-65 
— 5950 
-2-76 
- 1530 
1 -.3-95 
- 6910 
i 
-3-14 
- 4190 
! -5-03 
- 8490 
-3-53 
- 5780 
. 
-4-13 
- 7300 
-4-83 
- 8360 
-6-01 
- 9630 
< 
—6-56 
-10160 
These cycles give the following values of JHdl and the coercive force :— 
6 N 
MDCCCXCIII.—A. 
