Tables 371-372. 

 DEMAGNETIZING FACTORS FOR RODS. 



323 



TABLE 371. 



/f^=true intensity o. magnetizing field, iY' = intensity of applied field, /= in- 

 tensity of magnetization, H= H' — NI. 



Shuddemagen says : The demagnetizing factor is not a constant, falling for 

 highest values of /to about 1/7 the value when unsaturated; for values of B 

 (=■'^+4'^/) less than loooo, N is approximately constant; using a solenoid 

 wound on an insulating tube, or a tube of split brass, the reversal method gives 

 values for A^ which are considerably lower than those given by the step-by-step 

 method ; if the solenoid is wound on a thick brass tube, the two methods prac- 

 tically agree. 



C. R. Mann, Physical Review, 3, p. 359; 1896, 



H. DuBois, Wied. Ann. 7, p. 942 ; 1902. 



C, L. B. Shuddemagen, Proc. Am. Acad. Arts and Sci. 43, p. 185, 1907 (Bibliography). 



TABLE 372. 



Shuddemagen also gives the following, where B is determined by the step method 

 zxvAH=H'—KB. 



Smithsonian Tables. 



