Tables 570-572 



TABLE 570.— Magnetic Properties of Iron and Steel 



471 



E Gumlich, Zs fur Electrochemie, 15, p. 599; 1909. 

 Brackets indicate annealing at 8oo° C in vacuum. Parentheses indicate hardening by quenching from cherry-red. 



TABLE 571.— Cast Iron in Intense Fields 



B. O. Peirce, Proc. Am. Acad. 44, 1909. 



TABLE 572. — Corrections for Ring Specimens 



In the case of ring specimens, the average magnetizing force is not the value at the mean radius, 

 the ratio of the two being given in the table. The flux density consequently is not uniform, and 

 the measured hysteresis is less than it would be for a uniform distribution. This ratio is also given 

 for the case of constant permeability, the values being applicable for magnetizations in the neigh- 

 borhood of the maximum permeability. For higher magnetizations the flux density is more uni- 

 form, for lower it is less, and the correction greater. 



M. G. Lloyd, Bu.ll. Bur. Standards, 5, p. 435; 1908. 



Smithsonian Tables. 



