52 



A. W. Stewart on 



When a magnetic field is applied to a thin pencil of the 

 Becquerel rays the pencil is split up into three different sprays as 

 shown in Fi;?. III. 



jr-rays 



ot- rays 



6 Kays 



RADIOACTIVE SOURCC 



The Gamma-rays are almost unaHected by the magnetic 

 field ; the Alpha-rays are slightly deviated, while the Beta-rays 

 are more strongly aff"ected. 



The Alpha rays are defiected on to the right, the Beta 

 to the left of the original direction, which the Gamma-rays 

 continue to pursue, unaffected by the magnetic field. 



