TABLES 463-469. 

 MAGNETIC PROPERTIES OF METALS. 



TABLE 463.- Cobalt at 100 0. TABLE 464. -Nickel at 100 0. 



373 



TABLE 465. Magnetite. 



The following results are given by Du Bois * for a specimen of magnetite. 



Professor Ewing has investigated the effects of very intense fields on the induction in iron and other metals.t The 

 results show that the intensity of magnetization does not increase much in iron after the field has reached an in- 

 tensity of looo c. g. s. units, the increase of induction above this being almost the same as if the iron were not 

 there, that is to say, dBl dH is practically unity. For hard steels, and particularly manganese steels, much higher 

 forces are required to produce saturation. Hadfield's manganese steel seems to have nearly constant susceptibility 

 up to a magnetizing force of 10,000. The following tables, taken from living's papers, illustrate the effects of 

 strong fields on iron and steel. 



The results for nickel and cobalt do not differ greatly from those given above. 



TABLE 466. Lowmoor 

 Wrought Iron. 



TABLE 467. Vlcker's 

 Tool Steel. 



TABLE 468. -Hadlield's 

 Manganese Steel. 



1930 

 2380 

 335 

 5920 

 6620 

 7890 

 8, 



10 



in 



187 

 191 



2620 



3430 

 4400 



73 10 



8970 



10290 



11690 



14790 



1.36 

 1.44 



1.24 



1.30 



J-39 

 1.51 



TABLE 469. Saturation Valnes for Steels of Different Kinds. 



* " Phil. Mag." 5 series, vol. xxix, 1890. 

 SMITHSONIAN TABLES. 



t " Phil. Trans. Roy. Soc." 1885 and 1889. 



