734 
PROFESSOR F. G. BAILY ON THE HYSTERESIS OF 
Table IV.—Soft Iron Armature of 250 Plates of thickness ‘0081 centim. 
Diagram 5. Speed, 35 revs. per. sec. 
B. 
Hyst. in ergs 
per cub. centim. 
per rev. 
B. 
Hyst. in ergs 
per cub. centim. 
per rev. 
B. 
Hyst. in ergs 
per cab.centim. 
per rev. 
102 
9-6 
5,420 
4,650 
18,200 
14,800 
166 
22 
6,250 
5,430 
18,400 
14,300 
193 
26 
7,360 
6,850 
18,600 
14,000 
410 
87 
8,640 
8,450 
18,700 
13,500 
593 
97 
9,800 
10,450 
18,800 
12,900 
980 
367 
10,850 
11,600 
18,900 
12,400 
1,180 
483 
11,950 
13,000 
1,500 
725 
13,000 
13,600 
1,770 
933 
14,000 
14,100 
1,930 
1,090 
14,800 
14,900 
2,360 
1,430 
15,200 
15,200 
2,760 
1,750 
15,800 
15,600 
3,160 
2,090 
16,200 
15,700 
Eddies = 6 0 x lO"? B 2 . 
3,560 
2,480 
17,000 
15,900 
3,940 
2,960 
17,500 
15,750 
17,700 
15,700 
Also plotted on Diagram 8. 
17,900 
15,400 
Also plotted on Diagram 6. 
18,000 
15,100 
| 
Table V. — Hysteresis in Soft Iron Armature of 156 Plates of thickness '0081 centim. 
Square pole pieces. Diagram 5. Speed, 21 revs, per sec. 
B. 
Hyst. in ergs 
per cnb. centim. 
per rev. 
B. 
Hyst. in ergs 
per cnb. centim. 
per rev. 
B. 
Hyst. in ergs 
per cnb. centim. 
per rev. 
1,290 
390 
13,800 
13,200 
16,200 
14,700 
1,660 
1,000 
14,700 
1.3,900 
16,500 
15,000 
2,020 
1,160 
16,200 
14,500 
17,300 
14,200 
2,580 
1,630 
16,800 
14,300 
18,000 
12,600 
2,940 
1,940 
17,500 
13,800 
18,400 
11,100 
3,310 
2,480 
18,000 
12,600 
19,000 
8,800 
3,680 
2,800 
18,400 
12,700 
19,100 
6,800 
4,050 
3,340 
18,700 
9,500 
19,350 
5,700 
4,150 
3,410 
19,100 
6,800 
19,500 
4,800 
4,780 
3,950 
19,400 
5,900 
5,800 
5,100 
19,500 
4,500 
6,450 
5,800 
7,700 
7,200 
Eddy currents = 
9,300 
9,000 
14,400 
13,500 
3’5 X 10 
‘ B- ergs 
10,400 
11,200 
15,400 
13,850 
per cub. centim. per rev. 
