PEIRCE. — ANOMALOUS MAGNETIZATION OF IRON AND STEEL. 651 



doubtful. The next table (Table II.) records the results of observa- 

 tions made upon a certain piece of glass-hard tool steel, 12 centimeters 

 long and 3 centimeters in diameter. The solenoid used in this experi- 

 ment, one of a large number at our disposal, was 176.2 centimeters long 

 and had 5526 turns of insulated wire divided up into three coils of 1837, 



Figure 11. Magnetism induced by different exciting fields in a set of 

 rods of various lengths. 



1847, and 1847 turns respectively. The first column gives the inten- 

 sity of the exciting current and the second column, on an arbitrary scale, 

 the remanent magnetism, which always had the sign of the magnetizing 

 field which had just been suddenly interrupted. 



