PHOSPHORESCENT MOLECULES 291 



off at the same time, much more easily than a 

 corpuscle, as it is of the same sign as the aggre- 

 gate. The /8 rays are the corpuscles which are" 

 either shot out with a great velocity or on 

 account of the molecular concentration and in- 

 creased free-path acquire greater freedom and 

 diffuse out of the body. 



V 2 



