422 Mr Beatty, The production of Cathode Particles, etc. 



Table IV. 



7p of X«ro(dmttOTi iu/l^ 



^^o 



W 



Fig. 3. 



Note. In a recent communication to Nature (October 28, 

 1909) Sadler has determined various relations among the cathode 

 particles excited by homogeneous Rontgen radiations. His results 

 do not in all cases agree with the relations here described. 



I have much pleasure in thanking Sir J. J. Thomson for his 

 interest in this investigation. 



