400 



Scientific Proceedings, Royal Dublin Society. 



magnetic field. This wire was also taken down and heated three times 

 to a bright red heat in the same manner as the previous wire, then replaced 

 in the solenoid, and the damping curves again observed for botli D.O. and 

 A.C. magnetic fields. 



The results for both wires, S.C.I, and atalloy, in the soft physical state 

 are shown in Table IV, and also as curves' in fig. 3. 



20Q 



<3 



I 



25 50 



Number of Vibrations. 



The simple rigidity of the wires in the soft state was found to be 

 for S.C.I. = 800 X lO'', and for stalloy = 776 x I0^ grammes per 

 sq. cm. 



1 The two wires when tested in the physical state in which they were received from the 

 manufacturer had specific resistance ; S.C.I. = 10-5, stalloy = 44 microhms, per c.c. 



