and Electrical Resistance of Iron. 237 



TABLE IV.— Specimen B. 

 Induction and Permeability in various Magnetic Fields 



taken successively during cooling from 840° C. 

 Above critical Temperature. (Curves 4, 7, and 13.) 



H 



820°. 



816°. 



799°. 



1-017 



249 



4-40 



683 



9-20 



B 



29 

 84 



12 

 12 



B 



19 



35 



78 



101 



124 



19 

 14 

 18 

 15 

 13 



B 



• 40 



97 



163 



262 



363 



39 

 39 

 37 

 38 

 39 



Mean 

 Permeability 



} 



12 





16 





38 



H 



797°. 



788°. 



784° -5. 



782°-5. 





B 



M 



B 



/* 



B 



/* 



B 



/* 



1017 











124 



122 







249 











273 



110 







440 











518 



118 







6-83 



349 



51 



409 



60 



787 



115 



825? 



121? 



9-20 











1035 



113 







Mean 

 Permeability 



} 











116 







Below criti. 



cal Temperature. (Curves 4, 



7, and 11.) 



H 



770°. 



764°. 



746°. 





B 



M 



B 



M 



B 



M 



•078 







298 



3820 



198 



2540 



153 







663 



4330 



490 



3200 



•378 







2780 



7360 



2248 



5950 



1017 







5675 



5575 



5830 



5730 



249 







6720 



2700 



8020 



3220 



4-40 



5960 



1355 



7070 



1606 



8565 



1950 



683 



6500 



952 



7410 



1084 



8905 



1304 



9-20 







7870 



856 



9165 



996 



H 



710°. 



648°-5. 



567°. 



467°. 





B 



/* 



B 



/* 



B 



M 



B 



H 



■078 



131 



1680 



90 



1150 



61 



780 



57 



730 



•153 



322 



2100 



230 



1500 



141 



920 



143 



935 



•378 



1722 



4560 



1041 



2755 



645 



1710 



511 



1354 



1-017 



5955 



5850 



5fi85 



5585 



5110 



5020 



5195 



5100 



249 



8630 



3470 



9030 



3625 



8995 



3610 



9475 



3800 



440 



9840 



2260 



10440 



2375 



10695 



2430 



11030 



2510 



683 



10580 



1550 



11350 



1662 



11770 



1725 



12090 



1770 



920 



10955 



1191 



11870 



1290 



12315 



1340 



12660 



1377 



