244 Dr. D. K. Morris on the Magnetic Properties 



Table X. [continued) . 

 (b) Cycle between constant Limits of Magnetic Induction. 

 Specimen B. 



Annealed at 840°. 



Limits : 

 B= +4260. 



Tempera- 

 ture. 



Hysteresis in 



ergs per c.cm. 



per cycle. 



°0. 

 764 

 746 

 710 

 648 5 

 567 

 467 

 360-5 

 2515 

 136 



18 



187 

 216 

 318 

 357 

 398 

 396 

 495 

 590 

 656 

 744 



Annealed at 1150°. 



Limits : 

 B=+4550. 



Tempera- 

 ture. 



Hysteresis in 



ergs perc.cm. 



per cycle. 



°0. 

 764-5 

 748 

 730 



695 . 

 634 

 554 

 457 

 352 

 249 

 1375 



18 



81 

 109 

 128 

 178 

 264 

 335 

 379 

 475 

 508 

 555 

 613 



(c) Specimen B. 



Comparison of Hysteresis 



after annealing at 840° and 



1150°. 



(Reduced to a uniform Induction 

 Limit of B= ±4550.) 



Tempera- 



Annealed 



Annealed 



ture. 



at 840°. 



at 1150°. 



°0. 





20 



822 



612 



200 



686 



530 



400 



504 



437 



600 



430 



302 



700 



358 



176 



750 



236 



106 



(d) Hysteresis of Specimen B 

 at 20° and Induction Limits ±4550, 

 showing various stages of annealing. 





Hysteresis in 



ergs per c.cm. 



per cycle. 



1480 

 810 



780 



822 

 612 



Initial condition 



After 2 hrs. at 840° 



,, 5 hrs. „ •*" .».r.T.. T .. 



„ 6 hrs. „ and 

 very gradual cooling. 

 After heating to 1150° and 

 very gradual cooling. 



