68 



ProcccdiniiH <ij llie l!oi/al Irish Aadlcimi. 



Table IV. — contimied. 



Occasion. f!harge per e.o. in Electrostatic Units. 



5th March, 1912, . . . . . . 12-3 



. 10-3 



. 8-7 



. 8-4 



. 6-3 

 5-6 



. 4-2 



. , 3-2 



1st May, 1912, 



Occasion. 



B. — Nefjativr Rfdn. 



Cliarge per c.c. in Eleeti'ostatic Units. 



23rd June, 1911, . 

 5th March, 1912, . 



The foUowin 



4-9 

 9-0 

 8-3 

 7-4 

 6-6 

 6-2 

 3-3 



table gives the greatest values of current per sq. cm. 

 observed. In this manner of representing the result the rate at which the 

 rain is falling is of course taken into account as well as the charge per c.e : — 



Table V. 



Occasion. Current per 



<i- 



cm. in Amperes x 10-' 



5th March, 1912, 





+ 814 



+ 704 

 + 580 

 + 550 

 -370 

 -343 

 -275 



Ohscrvations on Snov.' and Hail. 







During this series of observations snow occurred on only one day, the 

 4th February, 1912. Four showers fell during the day, and observations of 

 each were made. The potential gradient was also observed during the 

 showers. Estimates of the quantity of snow falling into the receiver were made 

 by exposing a second vessel near the apparatus from which the snow could 

 be i-emoved at intervals and measured. 



