THE 



SCIENTIFIC PROCEEDINGS 



OF THE 



ROYAL DUBLIN SOCIETY. 



Yol. XII. (KS.), No. 26. PEBRUAEY, 1910. 



PERMANENT STEEL MAGNETS. 



W. BKOWN, B.Sc, 



PKOFESSOK OF APPLIED PHYSICS, ROYAL COLLEGE OF SCIENCE FOE IRELAND. 



[A uihors alone are responsible for all opinions expressed in iheirCommunicalions.'] 



DUBLIN: 



PUBLISHED BY THE EOYAL DUBLIN SOCIETY, 



LEINSTER HOUSE, DUBLIN. 



WILLIAMS AND NORGATE, 



14, HENRIETTA STREET, COVENT GARDEN, LONDON, W.C. / c^ ^ '^^y^ 



1910. [ Ju(\i lo i^lQ "^ 



Price Sixpence. ^V^o/?i(/ Mu8CVi''^V^ 



