January^ igo<p THE NEW YORK lO 



ACADCMY OF SCIENCES. 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



Volume XXVII, Section A, No. 10 



FREDERICK PURSER 



ON ETHER STRESS, GRAVITATIONAL 

 AND ELECTROSTATICAL 



DUBLIN 



HODGES, FIGGIS, & CO., Ltd. 



LONDON : WILLIAMS & NORGATE 



1909 



Price Sixpence 



