McCi-Ei.LAND AND NoLAN — The Elcctric Charge on Rain. 91 



3. Kain consisting of large drops was nearly always positively charged. 

 The charge per c.c. on this rain varied between wide limits. 



4. The negative charge per c.c. on rain consisting of minute drops was 

 smaller and more constant. 



5. Eain consisting of a mixture of minute and large drops was usually 

 positively charged ; but the charge was smaller than when large drops alone 

 were present. 



6. Snow and hail were observed on only a few occasions. The snow was 

 charged negatively and the hail positively. Abnormally large negative 

 potentials accompanied the fall of snow. 



It is hoped to discuss these results more fully when the observations 

 being made during the present winter months are ready for publication. 

 The results are in good agreement with those of Simpson, so that the charges 

 on rain are of the same type under ordinary atmospheric electrical conditions 

 as diiring thunderstorms. The further results we are now obtaining are 

 similar in character, but the average charge per c.c. is smaller than during 

 the summer months, and the division of the rain into different types is not so 

 well marked. 



f,,-t.!^. PKOC, VOL. XXIX. SECT, A. [18] 



