McCli j.lanu and Noi.an — The Elcclric Chanje on Rain. 63 

 Table I. 



Month. 



c.c. of rain 

 examined. 



Electrostatic Units 

 of Charge. 



Electrostatic Units , 

 per c.c. 



1 

 ' i - 



+ 1 



+ 



Oct. and Nov., 



.5280 600 



836-3 



234-0 



•1.58 ^:90 



December, 



lUO 270 



129-2 



12-4 



-113 -016 



Jamiary, . 



3870 



990 



930-8 



16-0 



-240 -016 



Febiii:ay, . 



3210 



960 



622-0 



■22 -S 



•194 -024 



JIarcl., 



4020 



690 



3963-8 



1811-7 



~ -986 2-63 



April, 



240 







11-0 







-046 



— 



May, 



960 



420 



629-0 



34-8 



•656 



' •083 



The previous observations streugtheu this point, for the average values of 

 charge per c.c. for March, April, May, aud June, 1911, were '81 and '41 

 for positive aud negative respectively. This contrast will also appear 

 if we exanime the number of times that different values of the charge 

 per c.c. have occm-red. The following tables give the number of discharges 

 of the tipping-bucket, each discharge representing 30 c.c. of rain, which 

 had values of charge per c.c. lying within certain limits. 



Table II. 

 A. — Positive Rain. 









Charge per c.c. in Electrostatic Units. 









Month. 















<1 



•1 - -2 



•2- 3 



•3- -4 



•4 - •o 



•5- 1 



1-2 J2 - 3 



i 



3-4 



4-5 



> 5 



Oct. and Nov., 



84 



40 



27 



16 



4 



5 



— _ - 



— 







December, 



25 



8 



4 



- 



- 



1 



- - 



- 



- 



— 



January, 



28 



35 



21 



22 



13 



10 



- -. 



- 



- 



— 



February, 



41 



26 



19 



6 



6 



10 



- - 



— 



— 



— 



1 March, . 



37 



25 



7 



2 i 3 



19 



23 3 



1 



1 



6 



April and May, 



26 



1 





— 1 — 



2 



8 2 



I 



_ 



— 



Total. . 



241 



135 



78 



46 26 



47 31 



2 



1 



6 



[10*1 



