338 



ILLINOIS STATE ACADEMY OF SCIENCE 



magnetic theory along tlie same lines. In fact, if any 

 kind of a wave theory is postulated in which the wave 

 front is discontinuous, it is evident at once that an ap- 

 preciable scattering effect would be expected under the 

 condition of the experiment. 



E i.so - 



"o 



.1.46 



(o 



O 



Q 



1.40 



1.36 



06 



Picture Numbers 



Pig. 4. Graphical representation of the differences in the diameters 

 of the electron traces. 



Why the velocity of the electron should be decreased 

 when they pass through short electromagnetic waves is 

 difficult to see in the light of our present theories. So far 

 as is known, the usual form of the undulatory theory can- 

 not give an explanation. 



