A HUGE ELECTRIC SPARK 

 This is an actual photograph of an 

 electric spark. It is leaping a dis- 

 tance of about to feet, and is the 

 discharge of a million volts. It is 

 a graphic illustration of the tre- 

 mendous energy of electrons. 



From "Scientific Ideas of To-day." 



ELECTRICAL ATTRACTION' BE- 

 TWEEN COMMON OBJECTS 



Take an ordinary flower-vase well 

 dried and energetically rub it with 

 a silk handkerchief. The vase 

 which thus becomes electrified 

 will attract any light body, such 

 as a feather, as shown in the above 

 illustration. 



