168 



Scientific Proceedings, Royal Dublin Society. 

 Table II. 



From the values in Table II it will be seen that, in the case of iron wire, 

 the maximum fatigue due to transverse alternating magnetic fields is about 



o 



la. 



10 



20 



40 



50 



60 



30 



Minufes. 



Fig. 3. 

 25 per cent, less than the maximum obtained with longitudinal alternating 

 magnetic fields of the same strength, and that it takes about twice as long to 

 attain the maximum. 



