the Magnetic Permeability of Nickel and Iron. 
TABLE LV. 
Relation between Permeability and Temperature, 
for different Fields. 
2 
Cs 
03 
Nickel. * ee 1. 
| | 
| Field of 10 C.G.S. Field of 40 C.G.S. Temperature. 
Es | 
| 44-0 | 89°8 18-0 | 
) 74:2 ) 98-0 151°75 | 
| 91-1 94:6 170°4 
111°8 91-2 205-0 
. 1550 95°0 246-7 
179°0 99°0 284°13 
184-4 Slay 321°8 
176-0 at 346-58 
DID 1 J4:2 361°25 
27-0 25:0 3717 
Nickel. Set IT. 
Field of 10 C.G.8. Field of 40 C.G.S. Temperature. 
59°95 92-0 170 
83°0 100-05 99°3 
875 102-5 106°3 
85°5 91-0 1339 
102°5 91:0 164:0 
99°98 87-0 182°8 
| 1070 83-2 231°7 
| 167-0 73-0 281-45 
) 153-0 64:0 310:05 
130°0 49-0 328°1 
81:5 29-0 353'05 
73'0 21:0 396°1 
14:0 +0 371°8 
TABLE V.—Nickel. 
. a Hysteresis loss in ergs 
Temperature. cgairnal oe per cub. em. per cycle. 
5 ei 5% , H= =+-45.€.G6:8. 
17-0 168-5 13:2 | 12700 
78°5 1450 12-0 | 10700 
107°05 137°5 11:0 $600 
15415 140-0 10°75 8500 
164-2 / 1300 10-0 8200 
182-4 125°0 95 7300 
231-7 | 420-0 8-0 5800 
281-45 92:5 sls 3400 
309°75 750 4°12 2600 
3527 | 250 1-25 450 
