192 



Scientific Proceedings, Royal Dublin Society. 



Table III. 

 Load = 2 x 10 s grammes per sq. cm. 



With direct longitudinal magnetic fields Honda and Terada 1 showed 

 that when the constant load on the nickel wire was increased the field in 

 which the minimum value of the modulus occurred was increased, but that 

 the actual value of the modulus was diminished. 



From the second columns in Tables II and III, it will be seen that the 

 reverse takes place with transverse magnetic fields, that is, when the 

 constant load on the nickel wire is increased the field in which the 

 maximum value of the modulus occurs is decreased and the actual value 

 of the modulus in that field is increased. 



From the values in Table III it will be seen that the maximum value 

 of the modulus for D.O. and A.C. fields at the different frequencies takes 

 place in the same field of about 28 units. 



Comparing the maximum values in columns 3 and 5 of Table III, it 

 will be found that when the frequency of the alternating field is increased 

 6 times the modulus is decreased about 2'5 per cent. 



For assistance in this work I am indebted to Mr. E. Macaulay, the 

 College Electrician. 



i Phil. Mag., Jan., 1907, p. 36. 



