PEIRCE. — ANOMALOUS MAGNETIZATION OF IRON AND STEEL. 667 



When the shell was removed the fluxes were those given in Table XV. 



TABLE XV. 

 Core alone. 



The eddy currents in the copper made the gradual reduction of the 

 current by the introduction of resistance into the circuit more continu- 

 ous and prevented the magnetizing field from vanishing suddenly when 

 the circuit was broken. 



A freshly annealed piece of Bessemer steel 1.6 centimeters in diame- 

 ter and 12 centimeters long was tested alone, and inside each of two 

 copper shells of its own length, with wall thicknesses of 1.20 cen- 

 timeters and 0.47 centimeters respectively. Table XVI. shows the 

 fluxes through the central cross section of the iron for slow removals 

 of the excitation. The fluxes for the thick shell, the thinner shell, and 

 for the core without any shell, are given in the columns headed A, B, 

 C. Table XVII. gives the corresponding figures for the case where the 

 exciting current was suddenly destroyed. 



TABLE XVI. 



Slow Break. 

 H. A. B. C. 



38 + 45.5 + 42.4 + 37.6 



64 + 84.2 + 71.5 + 67.0 



168 +162.4 +126.0 +108.0 



360 +207.0 +163.0 +112.5 



