and Electrical Resistance of Iron. 241 



TABLE VIII.— Specimen B. 



Data for Cyclic B-H Curves between constant limits of Induction taken 



successively at diminishing temperatures. 



(a) After annealing at 840° C. 

 Limits of Cycle : B= ±4260. (Curves 4 and 16.) 



764°. 



H 



•60 

 ■31 







•31 

 -•60 



B 



4250 

 3520 

 209? 

 -1762 

 -4250 



Hysteresis 

 per cycle 



= 187 ^ 

 cm. 1 



7 



16°. 



7 



10°. 



648°5. 



567°. 



H 



B 



H 



B 



H 



B 



H 



B 



•60 



4255 



•73 



4265 



•81 



4260 



•93 



4250 



•32 



3547 



•34 



3668 



•36 



3725 



•56 



3970 







2261 







2611 







2860 







2870 



-•32 



-1359 



-■34 



- 440 



-•36 



- 189 



-•56 



-2263 



-•60 



-4255 



-•73 



-4265 



-•81 



-4260 



-•93 



-4250 



216 ergs_ 



318 ^i! 



357 US. 



398 ^li 





cm. 





cm/ 





cm. 





cm. 



467°. 



360° -5. 



251° 5. 



136°. 



18°. 



H 



B 



H 



B 



H 



B 



H 



B 



H 



B 



•88 



4265 



•93 



4265 



105 



4265 



1-20 



4265 



1-318 



4265 



•38 



3760 



•40 



3743 



•42 



3732 



•43 



3700 



•426 



3725 







3010 







2930 







3000 







3033 







3115 



-•38 



- 733 



-•40 



924 



- -42 



1378 



- -43 



1630 



- -426 



1910 



-•88 



-4265 



-•93 



-4265 



-105 



-4265 



-1-20 



-4265 



-1-318 



-4265 



Hysteresis "J _ 396 ergs 

 per cycle J cm. 3 



495 !£i? 



590 e -TI? 



656 er S s 



744 5I£? 



cm. 3 



cm. 



cm. 3 



cm. 



(b) After annealing at 1150° C. 

 Limits of Cycle : B= +4550. (Curves 5 and 16.) 



764° -5. 



748°. 



730°. 



695°. 



H 



•640 



•210 







—•210 



-•640 



B 



4543 



3690 



1660 



- 2665 



-4543 



H 



•403 



•174 







-•174 



-•403 



B 



4540 



3662 



2002 



-1921 



-4540 



H 



•443 



•184 







-•184 



-•443 



B 



4547 

 3722 



2272 

 -1468 

 -4547 



H 



•516 



•197 







-•197 



-•516 



B 



4540 



3712 



2564 



- 897 



-4540 



Hysteresis] _g, ergs 

 per cycle J — crn .3 



109 erg8 

 cm. 



128 ?H5 



era. 3 



178 erg8 

 cm. 



