flature'* dfctraclea. 



have great capacity and be close together to 

 fully protect a building. 



There is a popular notion that rods draw the 

 lightning and increase the damage rather than 

 otherwise. This is a mistake. Points will 

 draw off electricity from a charged body 

 silently. It would be possible to so protect a 

 district of any size in such a way that thunder 

 would never be heard within its boundaries if 

 we should erect rods enough and run them 

 high enough into the upper air. The points 

 if they were close enough together would 

 silently draw off the electricity from a cloud 

 as fast as it formed, and thus effectually pre- 

 vent any disruptive discharge from taking 

 place. 



