and Electrical Resistance of Iron. 

 TABLE II.— Specimen A. 



Data for Cyclic B-H Curves at various Temperatures. 



Limits of Cycle : H= + 6'10. 



(a) Before annealing. (Curves 2.) 



235 



H 



20°. 



224°. 



367°. 



534°. 



665°. 





B 



B 



B 



B 



B 



610 



7370 



7145 



6830 



7980 



8610 



394 



6985 



6645 



6300 



7365 



7715 



224 



6380 



5945 



5530 



6500 



6570 



•917 



5620 



5090 



4660 



5410 



5240 







4800 



4232 



3805 



4265 



3750 



- 917 



3513 



2793 



2285 



1750 



- 526 



-2 24 



-1642 



-2365 



-2600 



-3935 



-5148 



-3 94 



-5410 



-5345 



-5170 



-6380 



-7140 



-610 



-7370 



-7145 



-6830 



-7980 



-8610 

 1850 



Hysteresis in "I 

 ergs per cm. 3 J ' 



3900 



3210 



2800 



2670 













(6) After annealing at 1050° C. (Curves 2 and 14.) 



H 



765°. 



708°. 



625°. 



506°. 



325°. 



175°. 



21°5. 





B 



B 



B 



B 



B 



B 



B 



610 



9100 



10220 



10640 



11185 



11850 



12320 



12480 



394 



8790 



9630 



10085 



10615 



11400 



12000 



12190 



224 



8075 



8720 



9220 



9880 



10815 



11520 



11760 



•917 



6720 



7205 



7730 



8565 



9925 



10835 



11180 







2985 



3930 



4780 



6190 



8170 



9565 



10210 



- 917 



-5830 



- 5845 



- 5290 



- 4290 



- 2005 



1389 



4170 



-224 



-7880 



- 8275 



- 8400 



- 8620 



- 9090 



- 9145 



- 8990 



-3 94 



-8780 



- 9440 



- 9750 



-10190 



- 10810 



-11210 



-11340 



-610 



-9100 



-10220 



-10640 

 1345 



-11185 



-11840 



-12320 



-12480 

 4570 



Hysteresis in "1 

 ergs per cm. 3 J 



500 



920 



2060 



3090 



4110 

















(c) After re-heating to 920°. (Curves not given.) 



H 



738°. 



679°. 



630°. 



22°. 





B 



B 



B 



B 



610 



10370 



10840 



10660 



12520 



3-94 



9565 



10115 



10020 



12210 



224 



8515 



9120 



9085 



11790 



•917 



6880 



7510 



7505 



11185 







3535 



4397 



4500 



9995 



- 917 



- 5610 



- 5240 



- 4435 



2766 



-224 



- 8100 



- 8365 



- 8080 



- 8420 



-394 



- 9450 



- 9320 



- 9670 



-11210 



-610 



- 10370 



-10840 



-10660 



-12520 



Hysteresis in 1 

 ergs per cm. 3 j 



780 



1280 



1510 



4720 











