12 Electricity of Atmospheric Precipitation. 



the complete separation of the electricity, hence the ratio of 

 positive to negative electricity is greater. 



(10) The separation of electricit} r produced by the impact 

 and friction of solids is probably greater than that produced 

 by the splashing of drops, hence very large charges on snow 

 may be expected. 

 Simla, March 1915. 



Appendix. 

 Observations on the electricity of precipitation. 



Place. Observers. 



Publications. 



Wolfenbeiitel Elster & Geitel. 

 (Brunswick). 



Wien. Per. xcix. p. 421 (1S90). 

 Terr. Magn. iv. p. 15 (1899). 



Gottingen. Gerdien. 



Munch. Per. xxxiii. p. 367 (1903). 

 Phys. Zeit. iv. p. 837 (1903). 



Vienna. Weiss. 



Wicn. Per. cxv. Abt. iia. p. 1299 



(1906). 



Porto Eico. Kohlrausch. 



Wien. Ber. cxviii. Abt. ii a. p. 25 

 (1909). 



Simla (India). Simpson. Phil. Trans. A. ccix. p. 379 (1909). 



i Proc. Roy. Soc. A. lxxxiii. d. 394 

 | (1910). 

 i Full details of observations given in 



India Met. Memoirs, vol. xx. 



pt. 8. 



Potsdam. K. Kahler. Phys. Zeit. ix. p. 258 (1908). 



1 Verdff d. k. Preuss. Met. Inst. 

 No. 213 (1909). 

 F. Scbindelbauer. Do. No. 263 (1913). 



Graz. Benndorf Wien. Per. exix. p. 89 (1910). 



Sits. Per. K.P. Akad. d. Wiss. 

 Munchen, p. 402 (1912). 



Puy-en-Yelay. Baldit, 



Le Eadium, viii. April 1911. 

 Do. ix. March 1912. 



Buenos Aires. Berndr. 



Phys. Zeit. xiii. p. 151 (1912). 

 Verdff d. Deutsch. Wiss. Vereins in 

 Buenos Aires, No. 3 (1913). 



Dublin. McClelland & Nolan. 



1 



, Roy. Irish Acad. Proc. xxix. p. 81 



(1912). 

 Do. xxx. p. 61 (1912). 



