ATMOSPHERIC ELECTRICITY. 



159 





N 



'.S 



.5 8 



sl 





fl 



| 

 & 



a . 

 u. o 



** 



p 



Si 



'I 



ii 



"+ 



CM 

 < 



5 

 la 



2 





s 



10 



Si 



1 





j 



Ji 



