PEIRCE. — MAGNETIZATION IN IRON. 



121 



It is now possible to get in the market large pieces of iron which 

 has less than 0.03% of impurities all told, and I have used Norway iron 



TABLE III. 



Hadfield and Hopkinson's Values of the Specific Magnetism 

 OF Ikon and Cakbon Alloys. 



Percentage of Carbon. 

 * 



0.5 

 1.0 

 1.5 

 2.0 

 2.5 

 3.0 

 3.5 



Specific Magnetism. 



1(380 

 1630 

 1580 

 1530 

 1480 

 1430 

 1380 

 1330 



99.87% pure, as well as many other specimens of nearly this excellence. 

 In some cases the specific magnetism seemed to be about 1740 and in 

 others less than 1700. For these determinations I have usually em- 

 ployed some form of isthmus method. 



TABLE IV. 

 Saturation Values of the Magnetization Vector in Iron. 



