268 



IT. NAGAOKA AND K. HONDA I 



difference in the method of measuring the twist and partly to 

 the non-uniformity of the fiehl, as was often the case in most of 

 the ohJer experiments. 



The observed angles of twist in iron and nickel are exhibited 

 in the following tables, where C denotes the longitudinal current 

 per sq. mm. in amperes, H the field strength in C.G.S. units 

 and r the angle of twist per cm. expressed in seconds. 



Circular Field being Constant. 

 Iron wire: fliam.=0.98 mm. 



Nickel wire: diam.=0.83 mm. 



