THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Vol. XIY. (IT.S.), lo. 39. JOTE, 1915. 



THE SUBSIDENCE OF TORSIONAL OSCILLATIONS 

 AND THE FATIGUE OF NICKEL WIRES WHEN 

 SUBJECTED TO THE INFLUENCE OF ALTER- 

 NATING MAGNETIC FIELDS OF FREQUENCIES 

 UP TO 250 PER SECOND. 



WILLIAM BROWN, B.Sc, 



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



\_A uthors alone are responsible for all opinions expressed in their Gommunioaiions.^ 



DUBLIN: 



PUBLISHED BY THE ROYAL DUBLIN SOCIE'l Y, 



LEIN8TER HOUSE, DUBLIN. 



WILLIAMS AND NORGATE, 



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



1915. 



Price Sixpence. 



