+7° 



Tables 568 and 569 



DEMAGNETIZING FACTORS FOR RODS 



TABLE 568 



H= true intensity o. magnetizing field, //' = intensity of applied field, /= in- 

 tensity of magnetization, //= H' — NI. 



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

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

 (=//-f-4 tt I) less than 10000, A T is approximately constant; using a solenoid 

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

 values for N 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 569 



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



and H=//'— KB. 



Smithsonian Tables. 



