1^16] on X-Rays and Atomic Structure 725 



collision of electrons with an anti-kathode is not of sufficiently sudden 

 a nature or sufficiently violent to result in the generation of X-rays 

 :as ordinarily detected. The probability is rather that the function 

 of the kathode particle is to displace electrons from atoms in the 

 anti-kathode, and thus to produce 'vibrations in the atoms which result 

 in the emission of the primary X-radiation. Some of these vibra- 

 tions may be due to the fall of electrons from definite positions — 

 outer rings — in which case characteristic radiations are emitted ; or 

 they may be due to falls from any other positions, in which case the 

 radiation is not characteristic of the anti-kathode. Such a mixture 

 of radiatious has been observed. 



[c. a. B.] 



WEEKLY EYENma MEETING, 



Friday, June 2, 1916. 



Sir James Crichton Browne, J.P. M.D. LL.D. F.R.S., 

 Treasurer and Yice-President, in the Chair. 



Lieut. Paul Hyacixthe Loysox. 

 La France dans I'HIstoire comme Champion du Droit. 



[No Abstract.] 



