34 Mr. R. L. Wills on the Effects of Temperature 



Table V. 



Temperature 

 15° C. 



Magnetic 

 Force 



_i?L 



1-76 



5-27 



8-78 

 13-17 

 17-56 

 21-95 

 23-71 

 26-34 

 3073 

 35-12 

 4215 



Permea- 

 bility 



JaL- 



46 



49 

 57 

 74 

 109 

 205 

 226 

 238 

 241 

 230 

 209 



Temperature 



before experiment 



245° C. 



Temperature 



after experiment 



245° C. 



Magnetic 



Force 



(H). 



176 



5-27 

 8-78 

 10-54 

 1317 

 1536 

 17-56 

 19-32 

 21-95 

 26-34 

 30 73 

 36-87 



Permea- 

 bility 

 M_ 



67 



79 

 103 

 141 

 231 

 346 

 360 

 354 

 335 

 304 

 273 

 236 



Temperature 



before experiment 



314° C. 



Temperature 



after experiment 



316° C. 



0-88 



79 



351 



95 



5-27 



105 



8-78 



153 



12-73 



364 



15-36 



395 



17-56 



383 



19-75 



365 



21-95 



346 



26-34 



306 



32-92 



259 



38 63 



228 



Temperature 



before experiment 



482° C. 



Temperature 



after experiment 



482° 0. 



0-176 



0-88 



2-63 



4-39 



7-02 



7-90 



8-78 



10-54 



13-17 



17-56 



2195 



2634 



185 

 185 

 238 

 317 

 549 

 586 

 604 

 580 

 511 

 411 

 346 

 298 



Temperature 



before experiment 



607° C. 



Temperature 



after experiment 



607° 0. 



0176 



278 



1-76 



347 



263 



419 



4-39 



611 



5-27 



694 



6-15 



712 



7-02 



704 



7 90 



660 



8-78 



626 



10-98 



519 



13-17 



454 



17-56 



362 



Temperature 



before experiment 



681° C. 



Temperature 



after experiment 



681° 0. 



0176 



0-88 

 1-76 

 2-20 

 3-07 

 351 

 395 

 4-39 

 5-27 

 615 

 8-78 



370 

 445 

 577 

 652 

 805 

 824 

 821 

 798 

 714 

 645 

 494 



The results are shown graphically in. fig. 16, the scale of 

 magnetic force for each curve being regulated so that the 

 point giving the maximum permeability occurs at the same 

 distance along the axis of force in each case. 



It will be seen that as the temperature increases the first 

 and second stages of the magnetizing process get less dis- 

 tinguishable, and when a temperature of '681° C. is reached 

 there is practically no first stage at all. 



Comparing these curves with the corresponding curves for 



