THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Vol. XIV. (N.S.), No. 26. JAEUAET, 1915. 



THE FATIGUE OF NICKEL AND IRON WIRES 

 WHEN SUBJECTED TO THE INFLUI^iNCE 

 OF ALTERNATING MAGNETIC FIELDS OF 

 FREQUENCY 50 PER SECOND. 



WILLIAM BROWN, B.Sc, 



PROFESSOR OF APPLIED PHYSICS, ROYAL COLLEGE OF SCIENCE FOB IRELAND, DUBLIN. 



[Authors alone are responsible jor all opinions expressed in iheirOommunications.~\ 



DUBLIN J 



PUBLISHED BY THE llOYAL DUBLIN SOCIETY, 



LEINSTEU HOUSE, DUBMN. 



WILLIAMS AND NORGATE, 



U, HENKIETTA STREET, COVENT GARDEN, LONDON. W.C. 



1915. 



Price Sixpence. 



