PROPERTIES OF CORPUSCLES. 



71 



in Fig. 17; and a piece of platinum, if placed in the focus, 

 may be raised to a white heat; and glass may be melted, 

 and a diamond charred. 



Fig. 17. Cathode rays of corpuscles brought to a focus. 

 MECHANICAL EFFECT. 



Corpuscles, when they strike against an object, tend to 

 push it away. This is very prettily shown in the appara- 

 tus in Fig. 18, where the impact of the corpuscles in the 

 cathode rays makes the little carriage move from one end 

 of the rails to the other. 



Fip. 18. Showing that corpuscles will move a body which they strike. 



