IM ] 



II. 



FURTHER OBSERVATIOiNS OF THE ELECTJIIC CIIAUGE ON 



RAIN. 



Bv rROFESSOll J. A. M'CLELLAND, D.Sc, F.R.S., 



AND 



A. GILMOUR, M.8a 



Kead Januauv 12. Piililislud Amu. 26, 1920. 



The whole subject of Meteorology lias iu recent years attracted a great 

 deal of attention in view of the increasing importance of the knowledge of 

 meteorological conditions in the upper atmosphere. Since 1890 much work- 

 has been done on the electricity of atmospheric precipitation. The data 

 obtained by various workers are, like all meteorological data, somewhat 

 irregular' and- hard to co-ordinate, and show how complicated the subject is.' 

 Simpson^ gives the following list of workers, and references to their publica- 

 tions : — 



Place. 



Wolfenbeiitel, 

 Brunswick. 



GottiiiKen, . 



Vienna, 

 Porto Eico, . 

 Simla (India), 



Potsdam, 



Graz, 



Puy-en-Velay, 

 Puenos Aires, 



Dublin, 



OuSEltVEU. 



Elster & Geitel, . 



Gerdien, 



Weiss, 



Koliliauscb, 



Simpson, 



Kiibler, 



Scbindelhauor, 

 Eenndoif, . 



Baldit, 

 Perndt, 



Nolan & McClelland, 



Publication. 



Wien. Per. xcix, p. J21 (18!(0). 

 TeiT. Magn. iv, p. 15 (1899). 



Miinch. Ber. xxxiii, p. 367 (190.3). 

 Pbys. Ziit. iv, p. 837 (1903). 



Wien. Ber. cxv, Abt. ii a, p. 1299 (1906). 



Wien. Ber. cxviii, Abt. ii a, p. 25 (1909) 



Phil. Trans. A. ccix, p. 379 (1909). 

 Proo. Roy. Soc. A. Ixxxiii, p. 394 (1910). 



Phys. Zeit. ix, p. 258 (190S). 



Veruff d. k. Preuss Met. Inst. No. 213 (1909). 



Ditto, No. 263 (1913). 



Wien. Ber. exix, p. 89 (1910). 

 Sitz. Ber. K. B. Akad. d. Wiss. Miinehon, p. -102 

 (1012). 



Lo Radium viii (Ai.rit, 1911). 

 Ditto ix (March, 1912). 



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

 Veiolf d. Deutsch. Wiss. Vereins in Buenos Aires, 

 No. 3 (1913). 



Roy. Irish Acad. Proc. xxix, A, p. 81 (1912). 

 Ditto XXX, A, p. 61 (1912). 



' Simpson, Phil. Mag., vol. xxx, p. 1. July, 1915. 



RI.A. I'KOO., VOL. XXXV, SKOT. A. 



[8] 



