388 



DK. G. C. SIMPSON ON THE ELECTRICITY OF 



A current of a given value may be made up in two ways : (1) by light rain 

 carrying heavy charges ; or (2) by heavy rain carrying light charges. Hence it will 

 be interesting to investigate the charges brought down by a given quantity of water 

 and then to see how these charges vary with the rate of rainfall. 



TABLE III. 



Table III shows the number of two minutes' intervals during which rain having 

 different charges was recorded. It will be seen that although these numbers do not 

 indicate any marked change in the proportion of positively charged rain as the 



TABLE IV. 



