IRON AND STEEL IN A ROTATING MAGNETIC FIELD. 
745 
Table XIII.—Soft Iron Armature of 250 Plates, of thickness '0081 centim. Varia¬ 
tion of Hysteresis with Speed ; Deflexions. 
Speed in 
revs, per 
sec. 
B = 2000. 
2750 
4400 
7800 
11,400 
15,000 
17,200 
17,200 
2 
4-0 
31-5 
7 
, , 
4-0 
7-8 
18-2 
31-4 
37-6 
38-8 
39-1 
14 
2-8 
41 
7-9 
18-3 
31 4 
38-2 
38-7 
39-3 
17-5 
2-6 
4-2 
7-9 
# # 
• o 
. , 
38-8 
38-8 
21 
2-6 
4-2 
8-1 
18-7 
32T 
38-6 
39-1 
38-1 
24-5 
2-4 
4-3 
8-1 
19-0 
3L8 
39-1 
39-5 
38-1 
28 
2-6 
4-4 
8-2 
19-1 
31-2 
38-7 
40T 
40-1 
31-5 
2-6 
4-4 
, , 
19-3 
31-4 
37-9 
40-1 
39-0 
35 
27 
4-4 
8-2 
19-2 
31-5 
38T 
397 
40-6 
38-5 
2-7 
# . 
. , 
19-6 
31-8 
38-8 
40-2 
39-9 
42 
2-7 
4-3 
8-2 
19-4 
30-8 
37-9 
39-5 
38-6 
45-5 
27 
4-3 
8-5 
19-7 
30-8 
38-4 
39-9 
40-2 
49 
, , 
4-4 
8-4 
20-3 
30-5 
37-6 
39T 
41-2 
52‘5 
. , 
4-2 
, , 
20-5 
30-7 
38-4 
39-1 
39-8 
56 
, , 
. . 
. . 
20-5 
31-5 
38-9 
40-2 
40'2 
59-5 
, , 
. . 
. , 
2L2 
31-9 
40-4 
4L2 
4L6 
63 
, , 
. . 
. , 
20-6 
32-2 
39-9 
417 
41-2 
66-5 
32-6 
• • 
43-6 
Hyst. 
1050 
1530 
3060 
7660 
12,100 
14,500 
14,700 
14,700 
Eddy currents (div.) 
■OOlu 
•002k 
•003k 
•006u 
•010k 
- 014k 
■014k 
5 o 
MDCCCXCVI.—A. 
